talcum powder
edit
The English name of talcum powder is PULVISTALCI, which is white or white-like, delicate and not sandy, and it feels greasy. Odorless and tasteless. This product is insoluble in water, dilute inorganic acid or dilute alkali hydroxide solution. Can be used medicinally. [ 1-3]
Chinese name
talcum powder
Foreign name
mica
Seze
White or white-like
Gas smell
Odorless and tasteless
water-solubility
indiscerptible
Chemical abstracts service number
14807-96-6
catalogue
Molecular structure diagram of 1
2 components
Three characteristics
4 Physical attributes
Chemical grade
Ceramic grade
Cosmetic grade
Pharmaceutical food grade
Paper grade
Brucite powder
5 industrial production
6 Asbestos composition
7 Scope of application
8 food application
9 medical application
10 traditional Chinese medicine
Different names
source
Mineral morphology
collect
medicinal material
chemical composition
pharmacological action
Prepare herbs by frying.
Sexual taste
Meridian tropism
Functional indication
dosage
avoid
Party selection
The exposition of famous scholars
1 1 Harm to human body
12 product classification
Molecular structure diagram editing
This product is magnesium silicate mineral talc, and its main component is hydrated magnesium silicate. After crushing, it is treated with hydrochloric acid, washed with water and dried.
Composition editor
The main component of talc is magnesium silicate containing water in talc, and the molecular formula is.
Molecular structure diagram
It is Mg3[Si4O 10](OH)2. Talc belongs to monoclinic system. Occasionally, the crystals are pseudohexagonal or rhombic. It is usually in the form of dense blocks, leaves, radiations and fibrous aggregate. Colorless, transparent or white, but it is light green, light yellow, light brown or even light red because it contains a small amount of impurities; Cleavage surface is pearl luster. Hardness 1, specific gravity 2.7 ~ 2.8.
Feature editing
Talc has excellent physical and chemical properties, such as lubricity, anti-sticking, flow aid, fire resistance, acid resistance, insulation, high melting point, chemical inactivity, good hiding power, softness, good luster and strong adsorption. Because the crystal structure of talc is layered, it tends to split into scales easily and has special lubricity. If the content of Fe2O3 is high, its insulation will be reduced.
Talc is soft, its Mohs hardness coefficient is 1 ~ 1.5, and it is slippery, with {00 1} cleavage extremely complete, easy to split into thin slices, small natural angle of repose (35 ~ 40) and extremely unstable. The surrounding rock is silicified magnesite, magnesite, lean ore or.
Physical attribute editing
name
talcum powder
official rank
Superior product
elegant
1250 (use)
country of origin
Hebei Province
Silicon dioxide content
60(%)
allowable error
0.0 1 (kg)
Magnesium oxide content
30(%)
white
93
Talcum powder specifications: 200 mesh, 325 mesh, 500 mesh, 600 mesh, 800 mesh, 1250 mesh, etc.
Chemical grade
Uses: Used as reinforcing and modifying filler in rubber, plastic, paint and other chemical industries. Features: increase the stability of product shape, improve tensile strength, shear strength, bending strength and compressive strength, reduce deformation, elongation and thermal expansion coefficient, with high whiteness, uniform particle size and strong dispersibility.
Ceramic grade
Uses: Used for manufacturing high-frequency porcelain, radio porcelain, various industrial ceramics, building ceramics, daily-use ceramics and ceramic glazes. Features: no discoloration at high temperature, enhanced whiteness after calcination, uniform density, good luster and smooth surface.
Cosmetic grade
Uses: It is a high-quality filler in cosmetic industry. Features: contains a lot of silicon. It has the function of blocking infrared rays, thus enhancing the sunscreen and infrared resistance of cosmetics.
Pharmaceutical food grade
Uses: Used as additive in medicine and food industry. Features: non-toxic, tasteless, high whiteness, good tolerance, strong gloss, soft taste and strong smoothness. The PH value is 7-9, which will not reduce the characteristics of the original product.
Paper grade
Usage: Used for all kinds of high-grade and low-grade paper products. Characteristics: Paper powder has the characteristics of high whiteness, stable particle size and small wear. The paper made of this powder can achieve smooth and delicate paper, save raw materials and improve the service life of grease net.
Brucite powder
Uses: Used for manufacturing electric porcelain, electric porcelain, various industrial ceramics, building ceramics, daily-use ceramics and ceramic glazes. Features: no discoloration at high temperature, enhanced whiteness after calcination, uniform density, good gloss and smooth surface.
Industrial production editor
talcum powder
The mined talc (raw material of talcum powder) is carefully selected, directly crushed by raymond mill or other high-pressure mills, and then packaged in woven bags (50 kg or 25 kg) to sell the finished products. In terms of mining methods, due to the extremely unstable ore and surrounding rock, the occurrence of ore bodies is mostly inclined and steeply inclined thick and extra-thick ore bodies, and the shape and thickness of ore bodies change greatly, and there are many inclusions in ore bodies. In the past, horizontal slicing, separation and filling mining method was used (at present, some mines still use this method).
Asbestos composition editor
talcum powder
Talc is one of the minerals. It is buried underground with serpentine containing asbestos, so it often contains asbestos in its natural form. Neither the National Toxicology Project of the United States nor the Occupational Safety and Health Administration (OSHA) of the United States listed talc as a known or possible carcinogen, so there is no way to say that asbestos in talc is carcinogenic. The American Association of Government Industrial Hygienists (ACGIH) also lists talcum powder as "a carcinogen that cannot be classified as human beings". Talc talcum powder is still used in America. According to the International Centre for Research on Cancer (IARC), "talc containing asbestos" is classified as a carcinogen. China people use it with caution.
Application scope editing
(1) cosmetic grade (HZ): used for all kinds of moisturizing powder, beauty powder, talcum powder, etc.
(2) Pharmaceutical-food grade (YS): medicinal tablets, sugar coating of medicinal powder (such as Acanthopanax senticosus powder), prickly heat powder, traditional Chinese medicine prescriptions, food additives, isolators, etc.
talcum powder
(3) Coating grade (TL): used for white pigments and various waterborne, oily and resin industrial coatings, primers, protective paints, etc.
(4) Paper grade (ZZ): filler of various papers and paperboard, and wood asphalt control agent.
(5) Plastic grade (SL): filler of plastics such as polypropylene, nylon, polyvinyl chloride, polyethylene, polystyrene and polyester.
(6) Rubber grade (AJ): used as rubber filler and adhesive for rubber products.
(7) Cable grade (DL): used as cable rubber extender and cable isolator.
(8) Ceramic grade (TC): used for manufacturing electric porcelain, electric porcelain, various industrial ceramics, building ceramics, daily-use ceramics and porcelain glaze, etc.
(9) Waterproof material grade (FS): used for waterproof coiled material, waterproof coating, waterproof ointment, etc.
(10) Fine talcum powder: used in high-grade paints and coatings, plastics, cable rubber, cosmetics, coated paper coatings, textile lubricants, etc. [2]
Food application editor
Edible talcum powder is used as an additive in medicine and food industry. Has the advantages of non-toxicity, no
talcum powder
It has the characteristics of soft and smooth taste and can be eaten, but excessive use or long-term consumption will cause cancer.
According to the national standard GB2760-20 1 1, the maximum dosage of talcum powder in preserved fruit and fermented food (licorice products) is 20.0g/kg.
Medical application editor
talcum powder
Source: This product is made of talc through selection, purification, crushing and drying.
talcum powder
Description: this product is white or white-like, fine and sand-free powder, which feels greasy. Odorless and tasteless. This product is insoluble in water, dilute hydrochloric acid or dilute sodium hydroxide solution.
Identification of this product, according to talc [identification ]( 1), (2) test, showed the same reaction.
Sexual taste is sweet, light and cold. It belongs to bladder meridian, lung meridian and stomach meridian.
Indications: diuresis for stranguria, clearing heat and relieving summer heat, eliminating dampness and healing sores. Used for heat stranguria, stranguria, astringent pain due to urine heat, polydipsia due to summer dampness, and damp-heat watery diarrhea; External treatment of eczema, wet sore and miliaria.
Usage and dosage: 10~20g ~ 20g, decocted in water. Appropriate amount for external use.
Storage is airtight.
Chinese medicine medical editor
Different names
Liquid stone, exfoliated stone, Fan Shi (not recorded), late cold (on medicinal properties), brittle stone, retained stone (Shi Yao Erya) and painted stone (Herbal Yi Yan).
source
It is a silicate mineral talc.
Mineral morphology
Talc monoclinic system. Crystals are hexagonal or rhombic plates, but complete crystals are rare, usually granular and scaly dense blocks. Light green, white or gray. The stripes are white or light green. Glossy and fatty. The cleavage plane is pearl-shaped. Translucent to opaque.
The cleavage along the bottom is very complete. Hardness 1, specific gravity 2.7 ~ 2.8. Soft sex. There is a sense of satiety. Talc can be sawn into any shape, and the sheet can be bent, but it has no elasticity. It mainly exists in metamorphic rocks, limestone, dolomite, magnesite and shale.
collect
After harvesting, clean up the soil and miscellaneous stones. Or scraping talc, pulverizing with a pulverizer, and sieving to obtain talc.
medicinal material
It is flat, rhombic or irregular blocks of different sizes. All white, egg blue or yellow white, with pearl-like luster on the surface, translucent or opaque. Soft and delicate, smooth to the touch, you can scrape off white powder with your nails. Odorless and tasteless, slightly cool. It is best to be neat, blue and white, smooth and free of miscellaneous stones. Jiangxi, Shandong, Jiangsu, Shaanxi, Shanxi, Hebei, Fujian, Zhejiang, Guangdong, Guangxi and Liaoning.
chemical composition
It mainly contains magnesium silicate, including MgO3 1.7%, silica 63.5% and water 4.8%. Usually a part of MgO is replaced by FeO. In addition, it also contains impurities such as alumina.
pharmacological action
(1) The function of protecting skin and mucosa. Because of its small particles and large total area, talcum powder can absorb a large number of chemical irritants or poisons, so it can play a protective role when applied to the surface of inflamed or damaged tissues; When taken orally, it can not only protect the inflamed gastrointestinal mucosa, but also prevent the gastrointestinal tract from absorbing toxic substances. Talcum powder is not completely harmless, it can cause granuloma in abdomen, rectum and vagina.
(2) Antibacterial effect: The culture medium contains 10% talcum powder, which has inhibitory effect on typhoid Bacillus and paratyphoid A; The regularity of paper has only a slight bacteriostatic effect on meningococcus.
Prepare herbs by frying.
Clean, mash into small pieces, or grind into fine powder, or fly with water. On Leigong's baking: use white talc, scrape it with a knife and grind it into powder. At the same time, when the peony bark is boiled, remove the peony bark, take talc, wash it with clear water and dry it in the sun.
Sexual taste
Sweet light, cold
1 classic: sweet and cold.
2 "No recording": cold, non-toxic.
3 "Materia Medica": sweet and light, cold and non-toxic.
Meridian tropism
Return to stomach meridian and bladder meridian.
1 Herbal Soup: Entering the Sun Sutra.
② The Solution Prepared by Lei Gong: Entering the stomach and bladder meridian.
③ "Herbal Shu Shu": entering the foot Yangming, and the hands are deficient in Yin, Sun and Yangming Meridian.
Functional indication
Clearing heat, eliminating dampness and inducing resuscitation. Treat summer heat, polydipsia, dysuria, watery diarrhea, dysentery, gonorrhea, jaundice, edema, epistaxis, beriberi and moist skin.
① Essence: the main body is hot and dry, and it is difficult for women to breastfeed, which is beneficial to urination. Cold and heat accumulate in the stomach and are beneficial to essence.
② "Don't record": dredge the viscera and body fluids of Jiuqiao Liufu, dissipate stagnation and quench thirst, and benefit middle energizer.
③ Theory of medicinal properties: it can cure five stranguria, dystocia, dysphoria and stranguria.
4 "Rihuazi Materia Medica": Treating breast abscess and promoting fluid production.
⑤ Herbal tonic: an essential medicine for eliminating dampness, dredging menstruation, strengthening intestine, detoxifying, promoting stagnation, promoting blood circulation, quenching thirst, nourishing spleen and stomach, and reducing heart fire.
⑥ Outline: Treat jaundice, edema, beriberi, hematemesis and epistaxis, bleeding from golden sore and various sores.
⑦ "Herbal Xuan Tong": clearing heat, clearing triple energizer, cooling the Sixth Hospital and relieving summer heat.
8 "Herbal rejuvenation": clearing fire and resolving phlegm, inducing diuresis to relieve summer heat, dredging channels and promoting blood circulation, stopping diarrhea and vomiting, eliminating edema and toxic fire.
dosage
Oral administration: decoction (cloth bag), 3 ~ 4 yuan; I still took the pills and dispersed them.
External use: grinding, mixing or dressing.
avoid
It is not suitable for people with spleen deficiency and weak qi, fine and slippery body fluid and fever. Pregnant women should take it carefully.
① Notes on Materia Medica: Made in Wei Shi. Evil has turned green.
② "Herbal Classics": it is forbidden for those who suffer from yin deficiency and internal heat, so that the water is less and astringent or unfavorable, and those who suffer from yin deficiency and excessive fire, thirst and body heat. People with spleen and stomach deficiency and cold should not take it even if they are venting.
(3) "drug meaning": thirst and urination are selfish, and body fluid is also insufficient; Those who have difficulty urinating and are not thirsty are not suitable for blood. And slippery, it is also taboo in front of the fetus.
4 "Ben Feng Jingyuan": The essence sinks and the urine is clear. Do not take it.
Party selection
(1) to treat fever, diarrhea, red and white dysentery, stranguria and stranguria; Promoting fluid production, promoting diuresis, quenching thirst, relieving anxiety and impatience, abdominal distension and pain, aphtha, tooth decay, heatstroke, typhoid fever and plague: talc 62, licorice 12 (stir-fried). The top is the bottom. Take San Qian with warm water three times a day. But pregnant women should not take it, and the tires are slippery. (Typhoid Specimens, Volume 63)
② Treatment of heat stranguria, red and astringent urine and heat pain: four or two talc. Beat the Luo into powder. Take two yuan each time, the soup and medicine are mixed, no matter when. (Talcum powder in Comprehensive Record of Biotechnology)
③ Treating qi-plastic obstruction, urinary stranguria, and pain under the umbilicus: eight points of talc. Grinding like noodles. Mix and stir with water and take. (Light Cube)
④ Treatment of postpartum stranguria: talcum is five taels, medulla tetrapanacis, plantain seeds and sunflower seeds are four taels each. Four flavors are served, waiting to be screened. Take one square inch of water and add it to two square inches. ("Qian Jinfang" talcum powder)
⑤ Treatment of dysuria, styloid pain and acute abdomen: talc, pollen typhae, etc. Serve two flavors, to be sifted. Drink three times a day. (Qian Jinfang)
⑥ Treatment of dysuria: talc is divided into two parts, hair is divided into two parts (burning) and white fish is divided into two parts. On the three flavors, it is scattered. Drink half a dollar and eat it three times a day. (Synopsis of the Golden Chamber: Talcum White Fish Meal)
⑦ Treatment of urinary tract obstruction: the last liter of talc is made of juice from the front of the car and the navel, four inches square, hot and easy, and water in winter and moon can also be used. (Milk Production Prescription)
(8) Treating jaundice, fever, aversion to cold, scanty abdomen, yellow body, dark forehead, dark stool and hot feet caused by daily feeding. It is difficult to treat patients with fullness: talc and gypsum are divided equally. Serve two flavors, to be sifted. Drink a square inch knife with barley porridge juice for three days, and defecation is extremely beneficial. ("Qian Jin Fang") 9 Treating a cold for a long time in the sun, heat accumulates in the bladder. The urine is red and astringent, or the stool is slippery, and the constipation is diarrhea. For those who are newly treated with damp-heat, those who hate cold and excess heat, and have a greasy tongue coating: one or two talcum, two licorice coins, forsythia San Qian, cicada returned to San Qian (feet removed and soil removed), and four Hangshao coins were born. In case of diarrhea, licorice must be doubled. (Tang Xuanjie in Records of Traditional Chinese Medicine)
Indications for typhoid fever and epistaxis: the dosage of talcum powder is not limited. Rice balls are as big as tung nuts. Take ten capsules each time, chew them slightly and swallow them with clear water. As long as a large sum of money at the end of the medicine and a little rice are chewed together, you can get it. Suitable for all ages. ("Skill Prescription" talc pill)
To cure violence, you can't spit and eat at the same time: raw talc is fine and refined. Warm water suit, but also warm half a lamp, pledge. (materia medica)
Treat strange symptoms of heat toxicity, such as red eyes, swollen nose, wheezing, spots all over the body and iron hair. Due to moderate heat, toxic gas is deposited in the lower coke: talc and alum. Finally, make one, three bowls of water, fry half, and don't stop drinking. (Xia Ziyi's prescription for treating strange diseases)
Treatment of sudden change of female urine for several days: talc 22, cold water stone 22, sunflower seed. Medication and mashing. Take three glasses of water, fry them to one and a half cups, except me, and take them twice before eating. ("Shenghuifang" talcum powder)
Treatment of sores and ulcers such as damp-heat in Tianbao: talc, licorice powder (half of this should be used), and the first-grade powder is applied. Or add mung bean powder to treat damp-heat and seborrhea. ("Jing Yue Quan Shu" Golden III)
Treatment of children's body heat rash: talcum powder 32, alum ash 12, jujube leaf 42. It's the last step to apply medicine and pound Luo. Wash the sore with warm pulp first, and then apply the medicine. ("Shenghuifang" talcum powder)
⒃ Treatment of toe joint rot: one or two talcum, half two gypsum (calcined), and a little dried alum. It is also used to treat sweating due to dampness. ("lakeside collection simplified formula")
The exposition of famous scholars
① Origin of the drug: Talc, which is heavier and can dissuade the upper and lower organs, is said to be slippery and beneficial to the orifices, which is different from other light osmotic drugs. Bai Zhejia, be careful. Those red ones are soaked through.
(2) Herbal decoction: Talc is slippery, which helps to clear the orifices and is the driest medicine. Talc and donkey-hide gelatin used in Zhu Ling soup are smooth and beneficial to waterways. Stir-fry scallion, black beans and ginger, remove residue and clarify to facilitate defecation, and the light taste will leak into the sun to relieve exterior symptoms and facilitate urination. If urinating is self-serving, it should not be solved.
Compendium of Materia Medica: Talc can cure thirst, but it can't cure thirst. If it is used to benefit the orifices, it will neutralize the temper and quench thirst. If the weather is too wet and people are thirsty because of bad urination, it is appropriate to use it to discharge, and thirst will not be born. If there is no dampness and thirst for urine is self-interest, then we know that there is dryness and heat in it, and dryness should be moist. If taken by mistake, it will kill its body fluid, and thirst will overwhelm everything.
(4) Outline: Talc is beneficial to the orifices, not only for urination, but also for the orifices of hair and fat, essence and drowning. Sweet and light taste first enters the stomach, permeates meridians, overflows body fluids, transports lung meridians, and then passes through bladder meridians. The lung governs the fur, which is the source of water god, and can release the body fluid of the bladder after gasification. Therefore, talc can be published in the upper part, which is beneficial to waterways and is a desiccant. Publishing books is hot in the upper part, waterway is hot in the lower part, publishing books is wet in the upper part and waterway is dry in the lower part. When cooling, the triple focus is peaceful and harmonious; When cooling, the door is open, which is beneficial to yin and yang. Liu Hejian used Yi Yuan San to cure all diseases from the outside to the inside, which was the original intention, but it didn't come out.
⑤ Classic of Materia Medica: Talc, which is slippery, beneficial, stagnation-relieving and dirty. Sweet to regulate stomach qi, cold to dissipate heat, sweet and cold to be smooth, and * * *, are the important drugs for removing summer heat, dissipating heat, promoting diuresis, resolving food stagnation and inducing resuscitation. This essence is used to relieve Yangming stomach heat in patients with body heat, diarrhea, difficulty in breastfeeding and accumulation of cold and heat in the stomach. For people with urinary incontinence, it is also beneficial to dredge the bladder and vagina. "Bielu" is beneficial to middle energizer by dredging nine orifices and body fluids, eliminating food stagnation and quenching thirst. Damp-heat solution leads to stomach qi harmony, body fluid is self-generated, and the general principle of lower orifices is self-discharge. Danxi is used to dry dampness, divide waterways, strengthen intestines, detoxify, accumulate stagnation, remove blood stasis, remove dryness and quench thirst, replenish spleen and stomach, reduce heart fire, and focus on stranguria.
⑥ "Drug Meaning": Talc is smooth and beneficial, with light taste and thorough heat, which can clear six internal organs without harm. Indications are summer heat, polydipsia, stomach stagnation, turbid stool pain, breast obstruction in women, thirst caused by acne rash in children, etc., all of which are beneficial to heat penetration. If the weather is too humid and wretched, it is the fastest to benefit the small intestine with Yiyuan Powder and Cinnabar. Treating your mouth as a thirst for urine is not good for diseases and ghosts. For heat, it is divided into lung, stomach and qi, so as to facilitate the downward flow of water and quench thirst.
⑦ Experience of Western Medicine: Talc is the most important medicine for people who have difficulty urinating. If the symptoms of cold and heat are exogenous, the upper coke is dry and hot, and the lower coke is slippery, it is the most dangerous time. You can take two doses of talc and raw yam, and then the upper side will clear away heat and the lower side will stop diarrhea, which will be effective at will. In addition, if the exogenous heat has receded and the pulse number due to yin deficiency cannot be recovered by itself, talc can be added less in Dazi Yin Zhen medicine, so that the residual heat of exogenous heat can still be discharged from the stool instead of being used as a tonic, and the disease will be easily cured. If it is not taken with licorice, it can cure summer heat dysentery; If you don't take it with ochre, you will be good at vomiting blood and nosebleed due to heat; If people have damp-heat, edema all over, fullness in the heart and unfavorable urination, talcum and dog can be ground into powder to facilitate urination and reduce swelling; For internal injuries due to yin deficiency, Liuwei Dihuang decoction should be used to nourish yin, and talc can also be added instead of ling and ze, so that the fever will be faster. Although talc is a kind of stone, its quality is very soft, and both decoction and pill are suitable for the spleen and stomach, so it can be added to Liuwei decoction instead of Ling and Ze. Its moistening force can be as sluggish as that of Ling and Ze, but it is better than Ling and Ze in cooling and assisting in nourishing yin and reducing fever.
Human hazard editor
Talcum powder is closely related to asbestos, which is a strong carcinogen. Talcum powder particles have been proved to be the cause of ovarian and lung tumors in cancer patients. In the past 30 years, scientists have been carefully examining talcum powder particles and found the danger similar to asbestos. 1973 In response to this evidence, the US Food and Drug Administration (FDA) drafted a resolution to limit the content of asbestos fiber in cosmetic grade talcum powder. But there is no official decision yet, and cosmetic-grade talcum powder is still not controlled by the federal government. This kind of idleness ignores the national toxicology project report of 1993, which found that cosmetic talcum powder without any asbestos fiber caused tumors in animal research subjects. Obviously, cosmetic talcum powder with or without asbestos fiber is a carcinogen.
Product classification editing
Various kinds of talcum powder are divided into three quality grades according to their physical and chemical properties: excellent product, first-class product and qualified product.
3.3 specifications
3.3. 1 ground talcum powder is divided into the following two specifications according to its fineness and sieving pass rate:
The fineness is 45μm, expressed as the weight percentage of products passing through the screen;
B fineness is 75μm, expressed as the weight percentage of products passing through the screen.
3.3.2 According to its particle size distribution and composition, ultrafine talcum powder is expressed as the cumulative percentage content of products less than 20,654,38+00,5 and 2 microns. ..
3.4 product marking
3.4. The product logo of1talcum powder is expressed in the following way:
Tag example
Example 1: coating grade talcum powder, whiteness 75%, fineness 45μm, and qualified rate 98%.
Talcum TL75-45-98GB
Example 2: Fine talcum powder with whiteness of 80%, particle size less than 20μm and cumulative percentage greater than 85%.
Talcum powder WF80-20-85GB
Example 3: Rubber-grade talcum powder with fineness of 75μm and qualified rate of 99.9%.
Talcum powder AJ75-99.9GB
Technical requirements for cable grade talcum powder
The physical and chemical properties of cable grade talcum powder shall comply with the provisions in Table 8.
Table 8 Physical and chemical properties of cable grade talcum powder%
________________________________________________________________________________
Excellent physical and chemical properties, first-class products, qualified products
Acid insoluble matter ≥ 90.0 87.0 85.0
Acid soluble iron (calculated by F[e][2]O[3]) ≤ 0.02 0.05 1.00.
Loss on ignition (1000℃) ≤ 6.008.0010.00.
Magnet attraction ≤ 0.04 0.07 0.01
Moisture ≤ 0.5 1.0
Fineness, pass rate ≥ 45μm, 98.0 75μ m,
Green tea, black tea and melon seeds were illegally added with industrial talcum powder, and completely faded after soaking for 20 seconds.
201March 18, many media reported that many melon seed processing plants used industrial talcum powder to make inferior melon seeds smooth and shiny. Industrial talc powder generally contains asbestos, which is a strong carcinogen. The investigation found that in order to pursue a better appearance, harmful substances such as alum and sodium metabisulfite were overused in the production of roasted seeds and nuts. Many melon seed processing plants have also added more than ten kinds of food additives, such as vanillin and saccharin sodium, and workers can grasp them at will. Red melon seeds and green tea seeds produced in this way flow into the market in large quantities, and their prices are more expensive than ordinary original melon seeds.