One of the signature dishes of Moroccan cuisine. Its ingredients include the exotic but its preparation is simplicity itself.
INGREDIENTS:
1 garlic clove, minced1 teaspoon ras el hanoutpinch of saffron, crushedpinch of loomisea saltblack pepper1 chicken or chicken pieces to serve 4 to 62 cups chicken broth1 cup white wine2 medium-sized onions, thinly sliced3/4 cup fresh flat leaf parsley, minced3/4 cup fresh cilantro, minced2 tablespoons extra virgin olive oil2 tablespoons butter1 cinnamon stick1/2 juice of lemon1 preserved lemon, peel only, cut into strips1 cup green and or black olives
PREPARATION:
Rub chicken inside and out with garlic, ras el hanout, saffron, loomi, salt and pepper. Put in a large Dutch oven.Add onions and herbs. Half cover with chicken broth and drop in the cinnamon stick Bring to a boil over medium-high heat then add the oil and butter. Cover and let boil for 45 minutes or until the Chicken is cooked.Transfer the chicken to a plate and keep warm. Boil the broth uncovered for a further 10 minutes, stirring regularly, until concentrated. Add the lemon juice, preserved lemon peel and olives and simmer for a few more minutes.About 5 minutes before the sauce is ready, if using whole chicken, cut up the chicken neatly into 8 pieces, then return to the pan, turning the pieces carefully in the sauce. Taste and adjust the seasoning if necessary. Transfer to serving dish and serve hot.
For more recipes visit Bio-saffron.com/Moroccan_saffron_recipes.html
vendredi 11 avril 2008
Information about Saffron
Saffron: is a spice derived from the flower of the saffron crocus (Crocus sativus), a species of crocus in the family Iridaceae. The flower has three stigmas, which are the distal ends of the plant's carpels. Together with its style, the stalk connecting the stigmas to the rest of the plant, these components are often dried and used in cooking as a seasoning and colouring agent. Saffron, which has for decades been the world's most expensive spice by weight, is native to Southwest Asia. It was first cultivated in the vicinity of Greece. Saffron is characterised by a bitter taste and an iodoform- or hay-like fragrance; these are caused by the chemicals picrocrocin and safranal. It also contains a carotenoid dye, crocin, that gives food a rich golden-yellow hue. These traits make saffron a much-sought ingredient in many foods worldwide. Saffron also has medicinal applications. The word saffron originated from the 12th-century Old French term safran, which derives from the Latin word safranum. Safranum is also related to the Italian zafferano and Spanish azafrán. Safranum comes from the Arabic word asfar (أَصْفَر), which means "yellow," via the paronymous zaafaran (زَعْفَرَان), the name of the spice in Arabic.
Biology
The domesticated saffron crocus C. sativus is a fall-flowering perennial plant unknown in the wild, and is a sterile triploid mutant of the eastern Mediterranean fall-flowering Crocus cartwrightianus. According to botanical research, C. cartwrightianus originated in Crete, not—as was once generally believed—in Central Asia. The saffron crocus resulted when C. cartwrightianus was subjected to extensive artificial selection by growers who desired elongated stigmas. Being sterile, the saffron crocus's purple flowers fail to produce viable seeds—thus, reproduction is dependent on human assistance: the corms (underground bulb-like starch-storing organs) must be manually dug up, broken apart, and replanted. A corm survives for only one season, reproducing via division into up to ten "cormlets" that eventually give rise to new plants. The corms are small brown globules up to 4.5 cm in diameter and are shrouded in a dense mat of parallel fibers. After a period of aestivation in summer, five to eleven narrow and nearly vertical green leaves—growing up to 40 cm in length—emerge from the ground. In autumn, purple buds appear. Only in October, after most other flowering plants have released their seeds, does it develop its brilliantly-hued flowers, ranging from a light pastel shade of lilac to a darker and more striated mauve. Upon flowering, it averages less than 30 cm in height. Inside each flower is a three-pronged style; in turn, each prong terminates with a crimson stigma 25–30 mm in length.
Cultivation
The saffron crocus thrives in climates similar to that of the Mediterranean maquis or the North American chaparral, where hot, dry summer breezes blow across arid and semi-arid lands. Nevertheless, the plant can tolerate cold winters, surviving frosts as cold as -10°C and short periods of snow cover. However, if not grown in wet environments like Kashmir and Madurai(where rainfall averages 1000–1500 mm annually), irrigation is needed—this is true in the saffron-growing regions of Greece (500 mm of rainfall annually) and Spain (400 mm). Rainfall timing is also key: generous spring rains followed by relatively dry summers are optimal. In addition, rainfall occurring immediately prior to flowering also boosts saffron yields; nevertheless, rainy or cold weather occurring during flowering promotes disease, thereby reducing yields. Persistently damp and hot conditions also harm yields, as do the digging actions of rabbits, rats, and birds. Parasites such as nematodes, leaf rusts, and corm rot also pose significant threats. Saffron plants—faring poorly in shady conditions—grow best in strong and direct sunlight. Thus, planting is best done in fields that slope towards the sunlight (i.e. south-sloping in the Northern Hemisphere), maximizing the crocuses' sun exposure. In the Northern Hemisphere, planting is mostly done in June, with corms planted some 7–15 cm deep. Planting depth and corm spacing—along with climate—are both critical factors impacting plant yields. Thus, mother corms planted more deeply yield higher-quality saffron, although they produce fewer flower buds and daughter corms. With such knowledge, Italian growers have found that planting corms 15 cm deep and in rows spaced 2–3 cm apart optimizes threads yields, whereas planting depths of 8–10 cm optimizes flower and corm production. Meanwhile, Greek, Moroccan, and Spanish growers have devised different depths and spacings to suit their own climates. Saffron crocuses grow best in friable, loose, low-density, well-watered, and well-drained clay-calcareous soils with high organic content. Raised beds are traditionally used to promote good drainage. Historically, soil organic content was boosted via application of some 20–30 tonnes of manure per hectare. Afterwards—and with no further manure application—corms were planted. After a period of dormancy through the summer, the corms send up their narrow leaves and begin to bud in autumn. Only in October (in the Northern Hemisphere) do the plants begin to flower. Harvesting of flowers is by necessity a speedy affair: after their flowering at dawn, flowers quickly wilt as the day passes. Furthermore, saffron crocuses bloom within a narrow window spanning one or two weeks. Approximately 150 flowers yield 1 g of dry saffron threads; to produce 12 g of dried saffron (72 g freshly harvested), 1 kg of flowers are needed. On average, one freshly-picked flower yields 0.03 g of fresh saffron, or 0.007 g of dried saffron.
Chemistry
Saffron contains in excess of 150 volatile and aroma-yielding compounds. It also has many nonvolatile active components, many of which are carotenoids, including zeaxanthin, lycopene, and various a- and ß-carotenes. However, saffron's golden yellow-orange colour is primarily the result of a-crocin. This crocin is trans-crocetin di-(ß-D-gentiobiosyl) ester (systematic (IUPAC) name: 8,8-diapo-8,8-carotenoic acid). This means that the crocin underlying saffron's aroma is a digentiobiose ester of the carotenoid crocetin. Crocins themselves are a series of hydrophilic carotenoids that are either monoglycosyl or diglycosyl polyene esters of crocetin. Meanwhile, crocetin is a conjugated polyene dicarboxylic acid that is hydrophobic, and thus oil-soluble. When crocetin is esterified with two water-soluble gentiobioses (which are sugars), a product results that is itself water-soluble. The resultant a-crocin is a carotenoid pigment that may comprise more than 10% of dry saffron's mass. The two esterified gentiobioses make a-crocin ideal for colouring water-based (non-fatty) foods such as rice dishes. The bitter glucoside picrocrocin is responsible for saffron's flavour. Picrocrocin (chemical formula: C16H26O7; systematic name: 4-(ß-D-glucopyranosyloxy)-2,6,6- trimethylcyclohex-1-ene-1-carboxaldehyde) is a union of an aldehyde sub-element known as safranal (systematic name: 2,6,6-trimethylcyclohexa-1,3-dien-1- carboxaldehyde) and a carbohydrate. It has insecticidal and pesticidal properties, and may comprise up to 4% of dry saffron. Significantly, picrocrocin is a truncated version (produced via oxidative cleavage) of the carotenoid zeaxanthin and is the glycoside of the terpene aldehyde safranal. The reddish-coloured zeaxanthin is, incidentally, one of the carotenoids naturally present within the retina of the human eye. When saffron is dried after its harvest, the heat, combined with enzymatic action, splits picrocrocin to yield D-glucose and a free safranal molecule. Safranal, a volatile oil, gives saffron much of its distinctive aroma. Safranal is less bitter than picrocrocin and may comprise up to 70% of dry saffron's volatile fraction in some samples. A second element underlying saffron's aroma is 2-hydroxy-4,4,6-trimethyl-2,5-cyclohexadien-1-one, the scent of which has been described as "saffron, dried hay like". Chemists found this to be the most powerful contributor to saffron's fragrance despite its being present in a lesser quantity than safranal. Dry saffron is highly sensitive to fluctuating pH levels, and rapidly breaks down chemically in the presence of light and oxidizing agents. It must therefore be stored away in air-tight containers in order to minimise contact with atmospheric oxygen. Saffron is somewhat more resistant to heat.
History
The history of saffron cultivation reaches back more than 3,000 years. The wild precursor of domesticated saffron crocus was Crocus cartwrightianus. Human cultivators bred wild specimens by selecting for unusually long stigmas. Thus, a sterile mutant form of C. cartwrightianus, C. sativus, emerged in late Bronze Age Crete. Experts believe saffron was first documented in a 7th century BC Assyrian botanical reference compiled under Ashurbanipal. Since then, documentation of saffron's use over the span of 4,000 years in the treatment of some 90 illnesses has been uncovered. Saffron has been used as a spice and medicine in the Mediterranean region since then, with usage and cultivation slowly spreading to other parts of Eurasia as well as North Africa and North America. In the last several decades, saffron cultivation has spread to Oceania.
Trade and usage
Saffron's aroma is often described by connoisseurs as reminiscent of metallic honey with grassy or hay-like notes, while its taste has been noted also as hay-like and yet somewhat bitter. Saffron also contributes a luminous yellow-orange colouring to foods. Because of the unusual taste and colouring it adds to foods, saffron is widely used in Arab, Central Asian, European, Indian, Iranian, Moroccan and Cornish cuisines. Confectionaries and liquors also often include saffron. Common saffron substitutes include safflower (Carthamus tinctorius, which is often sold as "Portuguese saffron" or "assafroa") and turmeric (Curcuma longa). Medicinally, saffron has a long history as part of traditional healing; modern medicine has also discovered saffron as having anticarcinogenic (cancer-suppressing), anti-mutagenic (mutation-preventing), immunomodulating, and antioxidant-like properties. Saffron has also been used as a fabric dye—particularly in China and India—and in perfumery. Most saffron is grown in a belt of land ranging from the Mediterranean in the west to Kashmir in the east. Annually, around 300 tonnes of saffron are produced worldwide. Iran, Spain, India, Greece, Azerbaijan, Morocco, and Italy (in decreasing order of production) are the major producers of saffron. A pound of dry saffron (0.45 kg) requires 50,000–75,000 flowers, the equivalent of a football field's area of cultivation. Some forty hours of frenetic day-and-night labour are needed to pick 150,000 flowers. Upon extraction, stigmas are dried quickly and (preferably) sealed in airtight containers. Saffron prices at wholesale and retail rates range from US$500/pound to US$5,000/pound (US$1100–US$11,000 per kilogram). In Western countries, the average retail price is $1,000/pound (US$2200 per kilogram). Between 70,000 and 200,000 threads comprise a pound. Vivid crimson colouring, slight moistness, elasticity, recent harvest date, and lack of broken-off thread debris are all traits of fresh saffron.
Cultivars
Several saffron cultivars are grown worldwide. Spain, a major saffron exporter, generally produces mellow varieties with less intense colour, flavour, and aroma. Spanish varieties include the 'Spanish Superior' and 'Creme' tradenames, and are graded via government-regulated minimum standards. Most Italian saffron is more potent in these characteristics. However, the world's most intense and valuable varieties disproportionately have Macedonian Greek, Iranian, and Kashmiri Indian pedigrees. Westerners may face significant obstacles in obtaining saffron from Iran and India. For example, the United States has banned the import of Iranian saffron; meanwhile, India has banned the export of high-grade saffron abroad. Aside from these, various "boutique" crops are available from places such as New Zealand, France, Switzerland, England, and the United States. In the U.S., for example, Pennsylvania Dutch saffron—which is known for its earthy notes—is available in relatively small quantities. There are a handful of what are generally considered by consumers to be "premium" saffron types. For example, 'Aquila' saffron (Italian: zafferano dell'Aquila) is cultivated in the Navelli Valley, near L'Aquila, in the Abruzzo region of Italy. There, saffron is grown on some eight hectares of land. At present, this is its exclusive domain worldwide. It is distinguished by the shape and colour of its stigmas and styles as well as its high safranal content. These give 'Aquila' saffron an unusually pungent aroma. In addition, high crocin content results in exceptional colouring ability. 'Aquila' was first introduced to Italy from Inquisition-era Spain by a Dominican monk. Thereafter, for the duration of the Middle Ages, 'Aquila' became Europe's most sought-after cultivars. But in Italy the biggest saffron cultivation, for quality and quantity, is in San Gavino Monreale, Sardinia. There, saffron is grown on 40 hectares (comprising 60% of Italian production); it also has very high crocin, picrocrocin, and safranal content. Another premium saffron is the Kashmiri "Mongra" or "Lacha" saffron (Crocus sativus 'Cashmirianus'), which is among the most difficult and expensive for non-Indian consumers to obtain. It is even hard for Indian consumers to obtain, as most stores in India sell the cheaper Spanish saffron. This is due to repeated droughts, blights, and crop failures in Kashmir, combined with an Indian export ban. Kashmiri saffron is recognisable by its extremely dark maroon-purple hue, among the world's darkest, which suggests the saffron's strong flavour, aroma, and colourative effect.
Grades
Saffron types are graded by quality according to laboratory measurements of such characteristics as crocin (colour), picrocrocin (taste), and safranal (fragrance) content. Other metrics include floral waste content (i.e. the saffron spice sample's non-stigma floral content) and measurements of other extraneous matter such as inorganic material ("ash"). A uniform set of international standards in saffron grading was established by the International Standards Organization, which is an international federation of national standards bodies. Namely, ISO 3632 deals exclusively with saffron. It establishes four empirical grades of colour intensity: IV (poorest), III, II, and I (finest quality). Saffron samples are then assigned to one of these grades by gauging the spice's crocin content, which is revealed by measurements of crocin-specific spectroscopic absorbance. Absorbance is defined as A? = - log(I / I0), with A? as absorbance. It is a measure of a given substance's transparency (I / I0, the ratio of light intensity passing through sample to that of the incident light) to a given wavelength of light. For saffron, absorbance is determined for the crocin-specific photon wavelength of 440 nm in a given dry sample of spice. Higher absorbances at this wavelength imply greater crocin concentration, and thus a greater colourative intensity. These data are measured through photospectroscopy reports at certified testing laboratories worldwide. These colour grades proceed from grades with absorbances lower than 80 (for all category IV saffron) up to 190 or greater (for category I). The world's finest samples (the selected most red-maroon tips of stigmas picked from the finest flowers) receive absorbance scores in excess of 250. Market prices for saffron types follow directly from these ISO scores. However, many growers, traders, and consumers reject such lab test numbers. They prefer a more holistic method of sampling batches of thread for taste, aroma, pliability, and other traits in a fashion similar to that practiced by practised wine tasters. Despite such attempts at quality control and standardisation, an extensive history of saffron adulteration—particularly among the cheapest grades—continues into modern times. Adulteration was first documented in Europe's Middle Ages, when those found selling adulterated saffron were executed under the Safranschou code. Typical methods include mixing in extraneous substances like beet, pomegranate fibers, red-dyed silk fibers, or the saffron crocus's tasteless and odorless yellow stamens. Other methods included dousing saffron fibers with viscid substances like honey or vegetable oil. However, powdered saffron is more prone to adulteration, with turmeric, paprika, and other powders used as diluting fillers. Adulteration can also consist of selling mislabeled mixes of different saffron grades. Thus, in India, high-grade Kashmiri saffron is often sold mixed with cheaper Iranian imports; these mixes are then marketed as pure Kashmiri saffron, a development that has cost Kashmiri growers much of their income.
Biology
The domesticated saffron crocus C. sativus is a fall-flowering perennial plant unknown in the wild, and is a sterile triploid mutant of the eastern Mediterranean fall-flowering Crocus cartwrightianus. According to botanical research, C. cartwrightianus originated in Crete, not—as was once generally believed—in Central Asia. The saffron crocus resulted when C. cartwrightianus was subjected to extensive artificial selection by growers who desired elongated stigmas. Being sterile, the saffron crocus's purple flowers fail to produce viable seeds—thus, reproduction is dependent on human assistance: the corms (underground bulb-like starch-storing organs) must be manually dug up, broken apart, and replanted. A corm survives for only one season, reproducing via division into up to ten "cormlets" that eventually give rise to new plants. The corms are small brown globules up to 4.5 cm in diameter and are shrouded in a dense mat of parallel fibers. After a period of aestivation in summer, five to eleven narrow and nearly vertical green leaves—growing up to 40 cm in length—emerge from the ground. In autumn, purple buds appear. Only in October, after most other flowering plants have released their seeds, does it develop its brilliantly-hued flowers, ranging from a light pastel shade of lilac to a darker and more striated mauve. Upon flowering, it averages less than 30 cm in height. Inside each flower is a three-pronged style; in turn, each prong terminates with a crimson stigma 25–30 mm in length.
Cultivation
The saffron crocus thrives in climates similar to that of the Mediterranean maquis or the North American chaparral, where hot, dry summer breezes blow across arid and semi-arid lands. Nevertheless, the plant can tolerate cold winters, surviving frosts as cold as -10°C and short periods of snow cover. However, if not grown in wet environments like Kashmir and Madurai(where rainfall averages 1000–1500 mm annually), irrigation is needed—this is true in the saffron-growing regions of Greece (500 mm of rainfall annually) and Spain (400 mm). Rainfall timing is also key: generous spring rains followed by relatively dry summers are optimal. In addition, rainfall occurring immediately prior to flowering also boosts saffron yields; nevertheless, rainy or cold weather occurring during flowering promotes disease, thereby reducing yields. Persistently damp and hot conditions also harm yields, as do the digging actions of rabbits, rats, and birds. Parasites such as nematodes, leaf rusts, and corm rot also pose significant threats. Saffron plants—faring poorly in shady conditions—grow best in strong and direct sunlight. Thus, planting is best done in fields that slope towards the sunlight (i.e. south-sloping in the Northern Hemisphere), maximizing the crocuses' sun exposure. In the Northern Hemisphere, planting is mostly done in June, with corms planted some 7–15 cm deep. Planting depth and corm spacing—along with climate—are both critical factors impacting plant yields. Thus, mother corms planted more deeply yield higher-quality saffron, although they produce fewer flower buds and daughter corms. With such knowledge, Italian growers have found that planting corms 15 cm deep and in rows spaced 2–3 cm apart optimizes threads yields, whereas planting depths of 8–10 cm optimizes flower and corm production. Meanwhile, Greek, Moroccan, and Spanish growers have devised different depths and spacings to suit their own climates. Saffron crocuses grow best in friable, loose, low-density, well-watered, and well-drained clay-calcareous soils with high organic content. Raised beds are traditionally used to promote good drainage. Historically, soil organic content was boosted via application of some 20–30 tonnes of manure per hectare. Afterwards—and with no further manure application—corms were planted. After a period of dormancy through the summer, the corms send up their narrow leaves and begin to bud in autumn. Only in October (in the Northern Hemisphere) do the plants begin to flower. Harvesting of flowers is by necessity a speedy affair: after their flowering at dawn, flowers quickly wilt as the day passes. Furthermore, saffron crocuses bloom within a narrow window spanning one or two weeks. Approximately 150 flowers yield 1 g of dry saffron threads; to produce 12 g of dried saffron (72 g freshly harvested), 1 kg of flowers are needed. On average, one freshly-picked flower yields 0.03 g of fresh saffron, or 0.007 g of dried saffron.
Chemistry
Saffron contains in excess of 150 volatile and aroma-yielding compounds. It also has many nonvolatile active components, many of which are carotenoids, including zeaxanthin, lycopene, and various a- and ß-carotenes. However, saffron's golden yellow-orange colour is primarily the result of a-crocin. This crocin is trans-crocetin di-(ß-D-gentiobiosyl) ester (systematic (IUPAC) name: 8,8-diapo-8,8-carotenoic acid). This means that the crocin underlying saffron's aroma is a digentiobiose ester of the carotenoid crocetin. Crocins themselves are a series of hydrophilic carotenoids that are either monoglycosyl or diglycosyl polyene esters of crocetin. Meanwhile, crocetin is a conjugated polyene dicarboxylic acid that is hydrophobic, and thus oil-soluble. When crocetin is esterified with two water-soluble gentiobioses (which are sugars), a product results that is itself water-soluble. The resultant a-crocin is a carotenoid pigment that may comprise more than 10% of dry saffron's mass. The two esterified gentiobioses make a-crocin ideal for colouring water-based (non-fatty) foods such as rice dishes. The bitter glucoside picrocrocin is responsible for saffron's flavour. Picrocrocin (chemical formula: C16H26O7; systematic name: 4-(ß-D-glucopyranosyloxy)-2,6,6- trimethylcyclohex-1-ene-1-carboxaldehyde) is a union of an aldehyde sub-element known as safranal (systematic name: 2,6,6-trimethylcyclohexa-1,3-dien-1- carboxaldehyde) and a carbohydrate. It has insecticidal and pesticidal properties, and may comprise up to 4% of dry saffron. Significantly, picrocrocin is a truncated version (produced via oxidative cleavage) of the carotenoid zeaxanthin and is the glycoside of the terpene aldehyde safranal. The reddish-coloured zeaxanthin is, incidentally, one of the carotenoids naturally present within the retina of the human eye. When saffron is dried after its harvest, the heat, combined with enzymatic action, splits picrocrocin to yield D-glucose and a free safranal molecule. Safranal, a volatile oil, gives saffron much of its distinctive aroma. Safranal is less bitter than picrocrocin and may comprise up to 70% of dry saffron's volatile fraction in some samples. A second element underlying saffron's aroma is 2-hydroxy-4,4,6-trimethyl-2,5-cyclohexadien-1-one, the scent of which has been described as "saffron, dried hay like". Chemists found this to be the most powerful contributor to saffron's fragrance despite its being present in a lesser quantity than safranal. Dry saffron is highly sensitive to fluctuating pH levels, and rapidly breaks down chemically in the presence of light and oxidizing agents. It must therefore be stored away in air-tight containers in order to minimise contact with atmospheric oxygen. Saffron is somewhat more resistant to heat.
History
The history of saffron cultivation reaches back more than 3,000 years. The wild precursor of domesticated saffron crocus was Crocus cartwrightianus. Human cultivators bred wild specimens by selecting for unusually long stigmas. Thus, a sterile mutant form of C. cartwrightianus, C. sativus, emerged in late Bronze Age Crete. Experts believe saffron was first documented in a 7th century BC Assyrian botanical reference compiled under Ashurbanipal. Since then, documentation of saffron's use over the span of 4,000 years in the treatment of some 90 illnesses has been uncovered. Saffron has been used as a spice and medicine in the Mediterranean region since then, with usage and cultivation slowly spreading to other parts of Eurasia as well as North Africa and North America. In the last several decades, saffron cultivation has spread to Oceania.
Trade and usage
Saffron's aroma is often described by connoisseurs as reminiscent of metallic honey with grassy or hay-like notes, while its taste has been noted also as hay-like and yet somewhat bitter. Saffron also contributes a luminous yellow-orange colouring to foods. Because of the unusual taste and colouring it adds to foods, saffron is widely used in Arab, Central Asian, European, Indian, Iranian, Moroccan and Cornish cuisines. Confectionaries and liquors also often include saffron. Common saffron substitutes include safflower (Carthamus tinctorius, which is often sold as "Portuguese saffron" or "assafroa") and turmeric (Curcuma longa). Medicinally, saffron has a long history as part of traditional healing; modern medicine has also discovered saffron as having anticarcinogenic (cancer-suppressing), anti-mutagenic (mutation-preventing), immunomodulating, and antioxidant-like properties. Saffron has also been used as a fabric dye—particularly in China and India—and in perfumery. Most saffron is grown in a belt of land ranging from the Mediterranean in the west to Kashmir in the east. Annually, around 300 tonnes of saffron are produced worldwide. Iran, Spain, India, Greece, Azerbaijan, Morocco, and Italy (in decreasing order of production) are the major producers of saffron. A pound of dry saffron (0.45 kg) requires 50,000–75,000 flowers, the equivalent of a football field's area of cultivation. Some forty hours of frenetic day-and-night labour are needed to pick 150,000 flowers. Upon extraction, stigmas are dried quickly and (preferably) sealed in airtight containers. Saffron prices at wholesale and retail rates range from US$500/pound to US$5,000/pound (US$1100–US$11,000 per kilogram). In Western countries, the average retail price is $1,000/pound (US$2200 per kilogram). Between 70,000 and 200,000 threads comprise a pound. Vivid crimson colouring, slight moistness, elasticity, recent harvest date, and lack of broken-off thread debris are all traits of fresh saffron.
Cultivars
Several saffron cultivars are grown worldwide. Spain, a major saffron exporter, generally produces mellow varieties with less intense colour, flavour, and aroma. Spanish varieties include the 'Spanish Superior' and 'Creme' tradenames, and are graded via government-regulated minimum standards. Most Italian saffron is more potent in these characteristics. However, the world's most intense and valuable varieties disproportionately have Macedonian Greek, Iranian, and Kashmiri Indian pedigrees. Westerners may face significant obstacles in obtaining saffron from Iran and India. For example, the United States has banned the import of Iranian saffron; meanwhile, India has banned the export of high-grade saffron abroad. Aside from these, various "boutique" crops are available from places such as New Zealand, France, Switzerland, England, and the United States. In the U.S., for example, Pennsylvania Dutch saffron—which is known for its earthy notes—is available in relatively small quantities. There are a handful of what are generally considered by consumers to be "premium" saffron types. For example, 'Aquila' saffron (Italian: zafferano dell'Aquila) is cultivated in the Navelli Valley, near L'Aquila, in the Abruzzo region of Italy. There, saffron is grown on some eight hectares of land. At present, this is its exclusive domain worldwide. It is distinguished by the shape and colour of its stigmas and styles as well as its high safranal content. These give 'Aquila' saffron an unusually pungent aroma. In addition, high crocin content results in exceptional colouring ability. 'Aquila' was first introduced to Italy from Inquisition-era Spain by a Dominican monk. Thereafter, for the duration of the Middle Ages, 'Aquila' became Europe's most sought-after cultivars. But in Italy the biggest saffron cultivation, for quality and quantity, is in San Gavino Monreale, Sardinia. There, saffron is grown on 40 hectares (comprising 60% of Italian production); it also has very high crocin, picrocrocin, and safranal content. Another premium saffron is the Kashmiri "Mongra" or "Lacha" saffron (Crocus sativus 'Cashmirianus'), which is among the most difficult and expensive for non-Indian consumers to obtain. It is even hard for Indian consumers to obtain, as most stores in India sell the cheaper Spanish saffron. This is due to repeated droughts, blights, and crop failures in Kashmir, combined with an Indian export ban. Kashmiri saffron is recognisable by its extremely dark maroon-purple hue, among the world's darkest, which suggests the saffron's strong flavour, aroma, and colourative effect.
Grades
Saffron types are graded by quality according to laboratory measurements of such characteristics as crocin (colour), picrocrocin (taste), and safranal (fragrance) content. Other metrics include floral waste content (i.e. the saffron spice sample's non-stigma floral content) and measurements of other extraneous matter such as inorganic material ("ash"). A uniform set of international standards in saffron grading was established by the International Standards Organization, which is an international federation of national standards bodies. Namely, ISO 3632 deals exclusively with saffron. It establishes four empirical grades of colour intensity: IV (poorest), III, II, and I (finest quality). Saffron samples are then assigned to one of these grades by gauging the spice's crocin content, which is revealed by measurements of crocin-specific spectroscopic absorbance. Absorbance is defined as A? = - log(I / I0), with A? as absorbance. It is a measure of a given substance's transparency (I / I0, the ratio of light intensity passing through sample to that of the incident light) to a given wavelength of light. For saffron, absorbance is determined for the crocin-specific photon wavelength of 440 nm in a given dry sample of spice. Higher absorbances at this wavelength imply greater crocin concentration, and thus a greater colourative intensity. These data are measured through photospectroscopy reports at certified testing laboratories worldwide. These colour grades proceed from grades with absorbances lower than 80 (for all category IV saffron) up to 190 or greater (for category I). The world's finest samples (the selected most red-maroon tips of stigmas picked from the finest flowers) receive absorbance scores in excess of 250. Market prices for saffron types follow directly from these ISO scores. However, many growers, traders, and consumers reject such lab test numbers. They prefer a more holistic method of sampling batches of thread for taste, aroma, pliability, and other traits in a fashion similar to that practiced by practised wine tasters. Despite such attempts at quality control and standardisation, an extensive history of saffron adulteration—particularly among the cheapest grades—continues into modern times. Adulteration was first documented in Europe's Middle Ages, when those found selling adulterated saffron were executed under the Safranschou code. Typical methods include mixing in extraneous substances like beet, pomegranate fibers, red-dyed silk fibers, or the saffron crocus's tasteless and odorless yellow stamens. Other methods included dousing saffron fibers with viscid substances like honey or vegetable oil. However, powdered saffron is more prone to adulteration, with turmeric, paprika, and other powders used as diluting fillers. Adulteration can also consist of selling mislabeled mixes of different saffron grades. Thus, in India, high-grade Kashmiri saffron is often sold mixed with cheaper Iranian imports; these mixes are then marketed as pure Kashmiri saffron, a development that has cost Kashmiri growers much of their income.
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