Chemistry:Trade and use of saffron

Saffron threads are soaked in hot—but not boiling—water for several minutes prior to use in cuisine. This helps release the beneficial components.

Sale of saffron and other spices in Iran

Saffron is a key seasoning, fragrance, dye, and medicine in use for over three millennia. One of the world's most expensive spices by weight, saffron consists of stigmas plucked from the vegetatively propagated and sterile Crocus sativus, known popularly as the saffron crocus. The resulting dried stigmas, also known as "threads", are distinguished by their bitter taste, hay-like fragrance, and slight metallic notes. The saffron crocus is unknown in the wild; its most likely precursor, Crocus cartwrightianus, originated in Crete or Central Asia; The saffron crocus is native to Southwest Asia and was first cultivated in what is now Greece.

From ancient to modern times the history of saffron is full of applications in food, drink, and traditional herbal medicine: from Africa and Asia to Europe and the Americas the brilliant red threads were—and are—prized in baking, curries, and liquor. It coloured textiles and other items and often helped confer the social standing of political elites and religious adepts. Ancient and medieval peoples believed saffron could be used to treat a wide range of ailments, from stomach upsets to the plague.

"Saffron, for example, was once less regarded than it is today because the crocus from which it is extracted was not particularly mysterious. It flourished in European locations extending from Asia Minor, where it originated, to Saffron Walden in England, where it was naturalised. Only subsequently, when its labour-intensive cultivation became largely centred in Kashmir, did it seem sufficiently exotic to qualify as one of the most precious of spices."

Saffron crocus cultivation has long centered on a broad belt of Eurasia bounded by the Mediterranean Sea in the southwest to India and China in the northeast. The major producers of antiquity—Iran, Spain, India, and Greece—continue to dominate the world trade.

The cultivation of saffron in the Americas was begun by members of the Schwenkfelder Church in Pennsylvania. In recent decades cultivation has spread to New Zealand, Tasmania, and California. Iran has accounted for around 90–93 percent of recent annual world production and thereby dominates the export market on a by-quantity basis. Indian kashmiri saffron is considered the finest and most expensive of all saffron.

Modern trade

Producing regions:	major	minor
Producing nations:	major	minor
Trading centres:	present	past

Producers

Almost all saffron grows in a belt bounded by the Mediterranean in the west and mountainous Kashmir in the east. All other continents except Antarctica produce smaller amounts. In 1991, Some 300 t (300,000 kg) of whole threads and powder are gleaned yearly, of which 50 t (50,000 kg) is top-grade "coupe" saffron. Iran is by far the world's most important producer: in 2005 it grossed some 230 tonnes (230,000 kg) of dry threads, or 93.7 percent of the year's global total mass; much of the Iranian crop was bound for export. In the same year, second-ranked Greece produced 5.7 t (5,700.0 kg). Morocco and India's (most of the region's saffron is grown in the more climatically suitable "Valley of Kashmir", which is in Union territory of Jammu and Kashmir) region of Kashmir, tied as the next-highest producer, each produced 2.3 t (2,300.0 kg). Kashmiri saffron is considered the finest and most expensive of all kind of saffron. In decreasing order, Iran, Greece, Morocco, India (Kashmir valley), Azerbaijan, Spain, and Italy dominate the world harvest.

In Iran, the world's leading producer, the erstwhile and northeasterly Khorasan Province, which in 2004 was divided in three, grows 95 percent of Iranian saffron: the hinterlands of Birjand, Ghayen, Ferdows in South Khorasan Province, along with areas abutting Gonabad and Torbat-e Heydarieh in Razavi Khorasan Province, are its key cropping areas. Afghanistan has resumed cultivation in recent years. Despite numerous cultivation efforts in such countries as Austria, England, Germany, and Switzerland, only select locales continue the harvest in northern and central Europe. Among these is the small Swiss village of Mund, in the Valais canton, whose annual saffron output amounts to several kilograms. Microscale cultivation occurs in Tasmania, China, Egypt, France, Israel, Mexico, New Zealand, Turkey (especially Safranbolu), California, and Central Africa.

C. sativus.

Price

Factors determining costs

The high cost of saffron is due to the difficulty of manually extracting large numbers of minute stigmas, which are the only part of the crocus with the desired aroma and flavour. An exorbitant number of flowers need to be processed in order to yield marketable amounts of saffron. Obtaining 1 lb (0.45 kg) of dry saffron requires the harvesting of some 50,000 flowers, the equivalent of an association football pitch's area of cultivation, or roughly 7,140 m² (0.714 ha). By another estimate some 75,000 flowers are needed to produce one pound of dry saffron. This too depends on the typical stigma size of each saffron cultivar. Another complication arises in the flowers' simultaneous and transient blooming. Since so many crocus flowers are needed to yield even derisory quantities of dry saffron, the harvest can be a frenetic affair entailing about forty hours of intense labour. In Kashmir, the thousands of growers must work continuously in relays over the span of one or two weeks throughout both day and night.

Once extracted, the stigmas must be dried quickly, lest decomposition or mould ruin the batch's marketability. The traditional method of drying involves spreading the fresh stigmas over screens of fine mesh, which are then baked over hot coals or wood or in oven-heated rooms where temperatures reach 30–35 °C (86–95 °F) for 10–12 hours. Afterwards the dried spice is preferably sealed in airtight glass containers.

Actual prices

Bulk quantities of lower-grade saffron can reach upwards of US$500 per pound; retail costs for small amounts may exceed ten times that rate. In Western countries the average retail price is approximately US$1,000 per pound. Indian Kashmiri saffron is considered best quality and most expensive saffron and has a high demand in world's spice market. Prices vary widely elsewhere, but on average tend to be lower. The high price is somewhat offset by the small quantities needed in kitchens: a few grams at most in medicinal use and a few strands, at most, in culinary applications; there are between 70,000 and 200,000 strands in a pound.

A price set during 2014 for Saffron grown within England was £15 for 0.2. grams, this being sold at Fortnum & Mason, and a gram priced at a value with a maximum of £75.

Buyers

Experienced saffron buyers often have rules of thumb when deliberating on their purchases. They may look for threads exhibiting a vivid crimson colouring, slight moistness, and elasticity. They reject threads displaying the telltale dull brick-red colouring—indicative of old stock—and broken-off debris collected at the container's bottom, indicative of age-related brittle dryness. Such aged samples are most likely encountered around the main June harvest season, when retailers attempt to clear out the previous season's old inventory and make room for the new season's crop. Buyers recommend that only the current season's threads be used. Reputable saffron wholesalers and retailers will indicate the year of harvest or the two years that bracket the harvest date; a late 2002 harvest would thus be shown as "2002/2003".

Culinary use

Saffron is one of three key ingredients in paella valenciana

Saffron features in European, North African, and Asian cuisines. Its aroma is described by taste experts as resembling that of honey, with woody, hay-like, and earthy notes; according to another such assessment, it tastes of hay, but only with bitter hints. Because it imparts a luminous yellow-orange hue, it is used worldwide in everything from cheeses, confectioneries, and liquors to baked goods, curries, meat dishes, and soups. In past eras, many dishes called for prohibitively copious amounts—hardly for taste, but to parade their wealth.

In Kashmir, saffron is used in kehva, an aromatic beverage made from saffron, almonds, wallnuts, cardamom etc. It is also used in Kashmiri marriage and occasional cuisine namely Wazwan, where chicken is cooked in its heated aromatic solution, and the dish is known as konge kokur in local language.

Because of its high cost saffron was often replaced by or diluted with safflower (Carthamus tinctorius) or turmeric (Curcuma longa) in cuisine. Both mimic saffron's colour well, but have distinctive flavours. Saffron is used in the confectionery and liquor industries; this is its most common use in Italy. Chartreuse, izarra, and strega are types of alcoholic beverages that rely on saffron to provide a flourish of colour and flavour. Saffron threads are often crumbled and pre-soaked in water or sherry for several minutes prior to adding them to a dish. This process extracts the threads' colour and flavour into the liquid phase; powdered saffron does not require this step. The soaking solution is then added to the hot cooking dish, allowing even colour and flavour distribution, which is critical in preparing baked goods or thick sauces.

Threads are a popular condiment for rice in Spain and Iran, India and Pakistan, and other countries. Two examples of such saffron rice is the zarzuela fish-seafood stew and paella valenciana, a piquant rice-meat preparation. It is essential in making the French bouillabaisse, which is a spicy fish stew from Marseilles, and the Italian risotto alla milanese.

A Swedish-style saffron bun, traditionally consumed before Christmas

The saffron bun has Swedish and Cornish variants and in Swedish is known as lussekatt (literally "Lucy cat", after Saint Lucy) or lussebulle. The latter is a rich yeast dough bun that is enhanced with saffron, along with cinnamon or nutmeg and currants. They are typically eaten during Advent, and especially on Saint Lucy's Day. In England, the saffron "revel buns" were traditionally baked for anniversary feasts (revels) or for church dedications. In the West of Cornwall, large saffron "tea treat buns" signify Methodist Sunday School outings and activities.

In traditional dishes of La Mancha, Spain, the spice is almost ubiquitous.

Moroccans use saffron in many salty or sweet-and salty dishes. It is a key recipe in the chermoula herb mixture that flavors many Moroccan dishes. Due to its high price, it is mostly used while cooking for special occasions as well as in some Moroccan high-end recipes like the pastilla. Other Moroccan dishes cooked with saffron include some types of tajines, kefta (meatballs with tomato), mqualli (a citron-chicken dish), and mrouzia (succulent lamb dressed with plums and almonds).

Uzbeks use it in a special rice-based offering known as "wedding plov" (cf. pilaf). Saffron is also essential in chelow kabab, the Iranian national dish. The use of saffron in south Indian cuisine is perhaps best characterised by the eponymous Kesari bhath - a semolina based dessert from Karnataka. South Asian cuisines also use saffron in biryanis, which are spicy rice-vegetable dishes. (An example is the Pakki variety of Hyderabadi biryani.) Saffron spices subcontinental beef and chicken entrees and goes into many sweets, particularly in Muslim and Rajasthani fare. Modern technology has added another delicacy to the list: saffron ice cream. Regional milk-based sweets feature it, among them gulab jamun, kulfi, double ka meetha, and "saffron lassi"; the last is a sweet yogurt-based Jodhpuri drink that is culturally symbolic.

Use Saffron in food

Shole Zard: This food is similar to Aush, Sholezard (Persian: شله‌زرد /ʃʊllə zærd/) is an Iranian traditional saffron rice pudding dessert.

ThahChin: (Tahchin Persian: ته چین), also spelled as tah chin or tah-chin, is an Iranian rice cake primarily consisting of rice, yogurt, saffron, and eggs.

ISaffron Icecream: Other name (Bastani sonnati), Very tasty ice cream with Cream or iranian pistachio.

Jojeh Kebab: Or (Jujeh kabab) Roast chicken in a mixture saffron. This Kebab, It is one of the most popular foods among Iranians.

Colouring

Buddhist monks in Hangzhou, China

Despite its high cost, saffron has been used as a fabric dye, particularly in China and India. It is in the long run an unstable colouring agent; the imparted vibrant orange-yellow hue quickly fades to a pale and creamy yellow. Even in minute amounts, the saffron stamens yield a luminous yellow-orange; increasing the applied saffron concentration will give fabric of increasingly rich shades of red. Clothing dyed with saffron was traditionally reserved for the noble classes, implying that saffron played a ritualised and status-keying role. It was originally responsible for the vermilion-, ochre-, and saffron-hued robes and mantles worn by Buddhist and Hindu monks. In medieval Ireland and Scotland, well-to-do monks wore a long linen undershirt known as a léine, which was traditionally dyed with saffron. In histology the hematoxylin-phloxine-saffron (HPS) stain and Movat's pentachrome stain are used as a tissue stain to make biological structures more visible under a microscope. Saffron stains collagen yellow.

There have been many attempts to replace saffron with a cheaper dye. Saffron's usual substitutes in food—turmeric and safflower, among others—yield a garishly bright yellow that could hardly be confused with that of saffron. Saffron's main colourant is the carotenoid crocin; it has been discovered in the less tediously harvested—and hence less costly—gardenia fruit. Research in China is ongoing.

Perfumery

In Europe saffron threads were a key component of an aromatic oil known as crocinum, which comprised such motley ingredients as alkanet, dragon's blood (for colour), and wine (again for colour). Crocinum was applied as a perfume to hair. Another preparation involved mixing saffron with wine to produce a viscous yellow spray; it was copiously applied in sudoriferously sunny Roman amphitheatres—as an air freshener.

See also

• History of saffron

References

Books

• Dalby, A. (2002), Dangerous Tastes: The Story of Spices (1st ed.), University of California Press, ISBN 978-0-520-23674-5, https://books.google.com/books?id=7IHcZ21dyjwC 
• Grigg, D. B. (1974), The Agricultural Systems of the World (1st ed.), Cambridge University Press, ISBN 978-0-521-09843-4 
• Hill, T. (2004), The Contemporary Encyclopedia of Herbs and Spices: Seasonings for the Global Kitchen (1st ed.), Wiley, ISBN 978-0-471-21423-6 
• Kafi, M.; Koocheki, A.; Rashed, M. H.; Nassiri, M. (eds.) (2006), Saffron (Crocus sativus) Production and Processing (1st ed.), Science Publishers, ISBN 978-1-57808-427-2, https://books.google.com/books?id=kO8prjfiiCEC 
• Keay, John (2005): The Spice Route: A History. John Murray, U.K. ISBN:0 7195 6805 6
• Major, J. (1892), "A History of Greater Britain as well England as Scotland", Publications of the Scottish History Society (University Press) 10 
• McGee, H. (2004), On Food and Cooking: The Science and Lore of the Kitchen, Scribner, ISBN 978-0-684-80001-1, https://books.google.com/books?id=iX05JaZXRz0C 
• Negbi, M. (ed.) (1999), Saffron: Crocus sativusL., CRC Press, ISBN 978-90-5702-394-1, https://books.google.com/books?id=l-QJaUp31T4C 
• Raghavan, S. (2006), "Saffron", Handbook of Spices, Seasonings, and Flavorings (2 ed.), CRC Press, ISBN 978-0-8493-2842-8 
• Rau, S. R. (1969), The Cooking of India, Foods of the World, Time-Life Books, ISBN 978-0-8094-0069-0 
• Willard, P. (2002), Secrets of Saffron: The Vagabond Life of the World's Most Seductive Spice, Beacon Press, ISBN 978-0-8070-5009-5, https://books.google.com/books?id=WsUaFT7l3QsC 

Journal articles

• Abdullaev, F. I. (2002), "Cancer Chemopreventive and Tumoricidal Properties of Saffron (Crocus sativus L.)", Experimental Biology and Medicine 227 (1): 20–5, doi:10.1177/153537020222700104, PMID 11788779, http://www.ebmonline.org/cgi/content/full/227/1/20, retrieved 11 September 2011 
• Assimopoulou, A. N.; Papageorgiou, V. P.; Sinakos, Z. (2005), "Radical Scavenging Activity of Crocus sativus L. Extract and Its Bioactive Constituents", Phytotherapy Research 19 (11): 997–1000, doi:10.1002/ptr.1749, PMID 16317646 
• Boskabady, M. H.; Ghasemzadeh Rahbardar, M.; Nemati, H.; Esmaeilzadeh, M. (2010), "Inhibitory Effect of Crocus sativus (Saffron) on Histamine (H1) Receptors of Guinea Pig Tracheal Chains", Die Pharmazie 65 (4): 300–5, PMID 20432629 
• Chang, P. Y.; Kuo, W.; Liang, C. T.; Wang, C. K. (1964), "The Pharmacological Action of 藏红花 (zà hóng huā—Crocus sativus L.): Effect on the Uterus and Estrous Cycle", Yao Hsueh Hsueh Pao 11 
• Chryssanthi, D. G.; Dedes, P. G.; Karamanos, N. K.; Cordopatis, P.; Lamari, F. N. (2011), "Crocetin Inhibits Invasiveness of MDA-MB-231 Breast Cancer Cells via Downregulation of Matrix Metalloproteinases", Planta Medica 77 (2): 146–51, doi:10.1055/s-0030-1250178, PMID 20803418 
• Deo, B. (2003), "Growing Saffron—The World's Most Expensive Spice", Crop and Food Research (New Zealand Institute for Crop and Food Research) (20), archived from the original on 27 December 2005, https://web.archive.org/web/20051227004245/http://www.crop.cri.nz/home/products-services/publications/broadsheets/020Saffron.pdf, retrieved 10 January 2006 
• Dharmananda, S. (2005), "Saffron: An Anti-Depressant Herb", Institute for Traditional Medicine, archived from the original on 26 September 2006, https://web.archive.org/web/20060926130959/http://www.itmonline.org/arts/saffron.htm, retrieved 10 January 2006 
• Ghorbani, M. (2008), "The Efficiency of Saffron's Marketing Channel in Iran", World Applied Sciences Journal 4 (4): 523–527, ISSN 1818-4952, http://www.idosi.org/wasj/wasj4%284%29/7.pdf, retrieved 3 October 2011 
• Gout, B.; Bourges, C.; Paineau-Dubreuil, S. (2010), "Satiereal, a Crocus sativus L. Extract, Reduces Snacking and Increases Satiety in a Randomised Placebo-Controlled Study of Mildly Overweight, Healthy Women", Nutrition Research 30 (5): 305–13, doi:10.1016/j.nutres.2010.04.008, PMID 20579522 
• Hasegawa, J. H.; Kurumboor, S. K.; Nair, S. C. (1995), "Saffron Chemoprevention in Biology and Medicine: A Review", Cancer Biotherapy 10 (4): 257–64, doi:10.1089/cbr.1995.10.257, PMID 8590890 
• Hosseinzadeh, H.; Karimi, G.; Niapoor, M. (2004), "Antidepressant Effect of Crocus sativus L. Stigma Extracts and Their Constituents, Crocin and Safranal, In Mice", Acta Horticulturae (International Society for Horticultural Science) (650): 435–445, doi:10.17660/actahortic.2004.650.54, http://www.actahort.org/books/650/650_54.htm, retrieved 23 November 2009 
• Nair, S. C.; Pannikar, B.; Panikkar, K. R. (1991), "Antitumour Activity of Saffron (Crocus sativus)", Cancer Letters 57 (2): 109–14, doi:10.1016/0304-3835(91)90203-T, PMID 2025883 
• Rubio-Moraga, A.; Castillo-López, R.; Gómez-Gómez, L.; Ahrazem, O. (2009), "Saffron Is a Monomorphic Species as Revealed by RAPD, ISSR, and Microsatellite Analyses", BMC Research Notes 2: 189, doi:10.1186/1756-0500-2-189, PMID 19772674 

Miscellaneous

• Courtney, P. (2002), "Tasmania's Saffron Gold", Landline (Australian Broadcasting Corp.), 19 May 2002, http://www.abc.net.au/landline/stories/s556192.htm, retrieved 29 September 2011 
• Katzer, G. (2010), "Saffron (Crocus sativus L.)", Gernot Katzer's Spice Pages, http://gernot-katzers-spice-pages.com/engl/Croc_sat.html, retrieved 3 December 2012 
• Lak, D. (1998), "Kashmiris Pin Hopes on Saffron", BBC News, 11 November 1998, http://news.bbc.co.uk/1/hi/world/south_asia/212491.stm, retrieved 11 September 2011 
• Malik, N. (2007), Saffron Manual for Afghanistan, DACAAR Rural Development Program, archived from the original on 9 September 2011, https://web.archive.org/web/20110909224926/http://www.icarda.org/RALFweb/PDFs/SaffronManualForAfghanistan.pdf, retrieved 17 September 2011 
• Park, J. B. (2005), "Saffron", USDA Phytochemical Database, archived from the original on 25 September 2006, https://web.archive.org/web/20060925041750/http://www.pl.barc.usda.gov/usda_supplement/supplement_detail_b.cfm?chemical_id=140, retrieved 10 January 2006 

External links

• ICEX (2015), Saffron in the word, ICEX, http://www.foodswinesfromspain.com/spanishfoodwine/tools/news/NEW2015514483.html 

• Darling Biomedical Library (2002), Saffron, UCLA, http://unitproj.library.ucla.edu/biomed/spice/index.cfm?displayID=22