Lac
Encyclopedia
Lac is the scarlet resinous secretion of a number of species of insects, namely some of the species of the genera Metatachardia, Laccifer, Tachordiella, Austrotacharidia, Afrotachardina, and Tachardina of the superfamily Coccoidea, of which the most commonly cultivated species is Kerria lacca
.
The above-mentioned families are some of the 28 families of scale insect
s and mealybug
s comprising a large group of about 8000 described species of plant sucking insects, a few of which produce similar natural products (e.g., cochineal
and crimson
). Thousands of these tiny insects colonize branches of suitable host trees and secrete the resinous pigment. The coated branches of the host trees are cut and harvested as sticklac.
The harvested sticklac is crushed and sieved to remove impurities. The sieved material is then repeatedly washed to remove insect parts and other soluble material. The resulting product is known as seedlac. The prefix seed refers to its pellet shape. It is used in violin
and other varnish
and is soluble in alcohol
. This type of lac was used in the finishing of 18th century fowling guns in the US. Seedlac which still contains 3-5% impurities is processed into shellac
by heat treatment or solvent extraction.
The leading producer of Lac is Jharkhand
, followed by Chhattisgarh
, West Bengal
, Maharashtra
states of India.
Lac production is also found in Bangladesh
, Myanmar
, Thailand
, Laos
, Vietnam
, parts of China
, and Mexico
.
goes back to ancient times. It has been used in India as a skin cosmetic and dye for wool and silk. In China it is a traditional dye for leather goods. The use of lac for dye has been supplanted by synthetic dyes. It is used in medicine as hepatoprotective and antiobesity drug.
Kerria lacca
Kerria lacca is a species of scale insect of the family Kerriidae. It is most well known for secreting lac, a scarlet substance that is used for dyeing wool and silk, as a cosmetic, and as a medicinal drug. Kerria lacca insects inhabit trees in colonies of thousands and secrete the resinous...
.
The above-mentioned families are some of the 28 families of scale insect
Scale insect
The scale insects are small insects of the order Hemiptera, generally classified as the superfamily Coccoidea. There are about 8,000 species of scale insects.-Ecology:...
s and mealybug
Mealybug
Mealybugs are insects in the family Pseudococcidae, unarmored scale insects found in moist, warm climates. They are considered pests as they feed on plant juices of greenhouse plants, house plants and subtropical trees and also acts as a vector for several plant diseases.-Distribution:Mealybugs...
s comprising a large group of about 8000 described species of plant sucking insects, a few of which produce similar natural products (e.g., cochineal
Cochineal
The cochineal is a scale insect in the suborder Sternorrhyncha, from which the crimson-colour dye carmine is derived. A primarily sessile parasite native to tropical and subtropical South America and Mexico, this insect lives on cacti from the genus Opuntia, feeding on plant moisture and...
and crimson
Crimson
Crimson is a strong, bright, deep red color. It is originally the color of the dye produced from a scale insect, Kermes vermilio, but the name is now also used as a generic term for those slightly bluish-red colors that are between red and rose; besides crimson itself, these colors include...
). Thousands of these tiny insects colonize branches of suitable host trees and secrete the resinous pigment. The coated branches of the host trees are cut and harvested as sticklac.
The harvested sticklac is crushed and sieved to remove impurities. The sieved material is then repeatedly washed to remove insect parts and other soluble material. The resulting product is known as seedlac. The prefix seed refers to its pellet shape. It is used in violin
Violin
The violin is a string instrument, usually with four strings tuned in perfect fifths. It is the smallest, highest-pitched member of the violin family of string instruments, which includes the viola and cello....
and other varnish
Varnish
Varnish is a transparent, hard, protective finish or film primarily used in wood finishing but also for other materials. Varnish is traditionally a combination of a drying oil, a resin, and a thinner or solvent. Varnish finishes are usually glossy but may be designed to produce satin or semi-gloss...
and is soluble in alcohol
Alcohol
In chemistry, an alcohol is an organic compound in which the hydroxy functional group is bound to a carbon atom. In particular, this carbon center should be saturated, having single bonds to three other atoms....
. This type of lac was used in the finishing of 18th century fowling guns in the US. Seedlac which still contains 3-5% impurities is processed into shellac
Shellac
Shellac is a resin secreted by the female lac bug, on trees in the forests of India and Thailand. It is processed and sold as dry flakes , which are dissolved in ethyl alcohol to make liquid shellac, which is used as a brush-on colorant, food glaze and wood finish...
by heat treatment or solvent extraction.
The leading producer of Lac is Jharkhand
Jharkhand
Jharkhand is a state in eastern India. It was carved out of the southern part of Bihar on 15 November 2000. Jharkhand shares its border with the states of Bihar to the north, Uttar Pradesh and Chhattisgarh to the west, Orissa to the south, and West Bengal to the east...
, followed by Chhattisgarh
Chhattisgarh
Chhattisgarh is a state in Central India, formed when the 16 Chhattisgarhi-speaking South-Eastern districts of Madhya Pradesh gained separate statehood on 1 November 2000....
, West Bengal
West Bengal
West Bengal is a state in the eastern region of India and is the nation's fourth-most populous. It is also the seventh-most populous sub-national entity in the world, with over 91 million inhabitants. A major agricultural producer, West Bengal is the sixth-largest contributor to India's GDP...
, Maharashtra
Maharashtra
Maharashtra is a state located in India. It is the second most populous after Uttar Pradesh and third largest state by area in India...
states of India.
Lac production is also found in Bangladesh
Bangladesh
Bangladesh , officially the People's Republic of Bangladesh is a sovereign state located in South Asia. It is bordered by India on all sides except for a small border with Burma to the far southeast and by the Bay of Bengal to the south...
, Myanmar
Myanmar
Burma , officially the Republic of the Union of Myanmar , is a country in Southeast Asia. Burma is bordered by China on the northeast, Laos on the east, Thailand on the southeast, Bangladesh on the west, India on the northwest, the Bay of Bengal to the southwest, and the Andaman Sea on the south....
, Thailand
Thailand
Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...
, Laos
Laos
Laos Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ Sathalanalat Paxathipatai Paxaxon Lao, officially the Lao People's Democratic Republic, is a landlocked country in Southeast Asia, bordered by Burma and China to the northwest, Vietnam to the east, Cambodia to the south and Thailand to the west...
, Vietnam
Vietnam
Vietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...
, parts of China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
, and Mexico
Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...
.
Host trees
Kerria lacca can be cultivated on either cultivated or wild host trees.- In India the most common host trees are
- DhakButea monospermaButea monosperma is a species of Butea native to tropical and sub-tropical parts of the Indian Subcontinent and Southeast Asia, ranging across India, Bangladesh, Nepal, Pakistan, Sri Lanka, Myanmar, Thailand, Laos, Cambodia, Vietnam, Malaysia, and western Indonesia...
(Butea monospermaButea monospermaButea monosperma is a species of Butea native to tropical and sub-tropical parts of the Indian Subcontinent and Southeast Asia, ranging across India, Bangladesh, Nepal, Pakistan, Sri Lanka, Myanmar, Thailand, Laos, Cambodia, Vietnam, Malaysia, and western Indonesia...
) - BerZiziphus mauritianaZiziphus mauritiana, also known as Jujube, Chinee Apple, Indian plum, and permseret , is a tropical fruit tree species belonging to the family Rhamnaceae....
(Ziziphus mauritianaZiziphus mauritianaZiziphus mauritiana, also known as Jujube, Chinee Apple, Indian plum, and permseret , is a tropical fruit tree species belonging to the family Rhamnaceae....
) - Kusum (Schleichera oleosa), (Reported to give the best quality and yield ).
- Dhak
- In Thailand the most common host trees are
- Rain tree (Samanea samanSamanea samanAlbizia samanalso known as samanea saman, is a species of flowering tree in the pea family, Fabaceae, that is native to the Neotropics. Its range extends from Mexico south to Peru and Brazil, but it has been widely introduced to South and Southeast Asia, as well as the Pacific Islands, including...
) - Pigeon peaPigeon peaThe pigeon pea , also known as tropical green pea, toor dāl or arhar dāl , ತೊಗರಿ ಬೇಳೆ kadios , or Congo pea or gungo pea , pois Congo , gandul , gunga pea, or no-eye pea, [Cajanus...
(Cajanus cajanPigeon peaThe pigeon pea , also known as tropical green pea, toor dāl or arhar dāl , ತೊಗರಿ ಬೇಳೆ kadios , or Congo pea or gungo pea , pois Congo , gandul , gunga pea, or no-eye pea, [Cajanus...
)
- Rain tree (Samanea saman
- In China the common host trees include
- Pigeon peaPigeon peaThe pigeon pea , also known as tropical green pea, toor dāl or arhar dāl , ತೊಗರಿ ಬೇಳೆ kadios , or Congo pea or gungo pea , pois Congo , gandul , gunga pea, or no-eye pea, [Cajanus...
(Cajanus cajanPigeon peaThe pigeon pea , also known as tropical green pea, toor dāl or arhar dāl , ತೊಗರಿ ಬೇಳೆ kadios , or Congo pea or gungo pea , pois Congo , gandul , gunga pea, or no-eye pea, [Cajanus...
) - HibiscusHibiscusHibiscus is a genus of flowering plants in the mallow family, Malvaceae. It is quite large, containing several hundred species that are native to warm-temperate, subtropical and tropical regions throughout the world...
species
- Pigeon pea
- In Mexico
- Barbados nutJatropha curcasJatropha curcas is a species of flowering plant in the spurge family, Euphorbiaceae, that is native to the American tropics, most likely Mexico and Central America. It is cultivated in tropical and subtropical regions around the world, becoming naturalized in some areas...
(Jatropha curcasJatropha curcasJatropha curcas is a species of flowering plant in the spurge family, Euphorbiaceae, that is native to the American tropics, most likely Mexico and Central America. It is cultivated in tropical and subtropical regions around the world, becoming naturalized in some areas...
)
- Barbados nut
Uses
The use of lac dyeDye
A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber....
goes back to ancient times. It has been used in India as a skin cosmetic and dye for wool and silk. In China it is a traditional dye for leather goods. The use of lac for dye has been supplanted by synthetic dyes. It is used in medicine as hepatoprotective and antiobesity drug.
Species
- Kerria laccaKerria laccaKerria lacca is a species of scale insect of the family Kerriidae. It is most well known for secreting lac, a scarlet substance that is used for dyeing wool and silk, as a cosmetic, and as a medicinal drug. Kerria lacca insects inhabit trees in colonies of thousands and secrete the resinous...
- the true lac scale. - Paratachardina decorellaParatachardina decorellaParatachardina decorella, the rosette lac scale, is a scale insect in the Kerriidae family....
- the rosette lac scale. - Paratachardina pseudolobata - the lobate lac scale.
See also
- LacquerLacquerIn a general sense, lacquer is a somewhat imprecise term for a clear or coloured varnish that dries by solvent evaporation and often a curing process as well that produces a hard, durable finish, in any sheen level from ultra matte to high gloss and that can be further polished as required...
- A product that was at one time made from lac, but in modern common usage now refers to a separate product with similar properties. - ShellacShellacShellac is a resin secreted by the female lac bug, on trees in the forests of India and Thailand. It is processed and sold as dry flakes , which are dissolved in ethyl alcohol to make liquid shellac, which is used as a brush-on colorant, food glaze and wood finish...
- A protective coating. - CarmineCarmineCarmine , also called Crimson Lake, Cochineal, Natural Red #4, C.I. 75470, or E120, is a pigment of a bright-red color obtained from the aluminum salt of carminic acid, which is produced by some scale insects, such as the cochineal beetle and the Polish cochineal, and is used as a general term for...
(E120) - Another pigment extracted from an insect.
External links
- Picture of lac insect
- Drawing of insect, its larva and a colony
- Indian Institute of Natural Resins and Gums - IINRG, formerly Indian Lac Research Institute - ILRI
- Beads and other products produced with the help of lac. Manufacturing process and information on site.
- FAO - Insect dyes - Lac - Summary of Basic Information
- The Jatropha Website For production in MexicoMexicoThe United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...
