Paint knowledge | natural lacquer knowledge

Core tip: you may have heard of lacquer, but you don't know much about it Raw lacquer has good corrosion resistance, wear resistance, good insulation and other characteristics, is a very high-quality coating Next small seven will give you a detailed introduction of lacquer related knowledge Lacquer, also known as "national lacquer", "big lacquer", "earth lacquer" and "old lacquer", is one of the three agricultural treasures in China (tree cutting lacquer, silkworm spinning silk, bee making honey) It is a kind of milky white colloidal liquid (belonging to water emulsion paint) which is cut from lacquer tree It is the only paint that is known to be dried by biocatalysis (laccase) Once in contact with air, it turns brown, and the surface dries up and hardens after a few hours Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Paint Home News: you may have heard of lacquer, but you don't know much about it Raw lacquer has good corrosion resistance, wear resistance, good insulation and other characteristics, is a very high-quality coating Next small seven will give you a detailed introduction of lacquer related knowledge Lacquer, also known as "national lacquer", "big lacquer", "earth lacquer" and "old lacquer", is one of the three agricultural treasures in China (tree cutting lacquer, silkworm spinning silk, bee making honey) It is a kind of milky white colloidal liquid (belonging to water emulsion paint) which is cut from lacquer tree It is the only paint that is known to be dried by biocatalysis (laccase) Once in contact with the air, it turns brown, and after a few hours, the surface dries and hardens to form a paint skin Lacquer liquid is toxic, which causes redness, swelling, itching and pain in case of skin contact with lacquer allergy, and strong stimulation in case of ingestion, which will cause stomatitis, ulcer, vomiting and diarrhea In serious cases, toxic nephropathy may occur However, after drying, the lacquer has excellent physical and chemical properties and does not contain harmful substances such as organic solvents and heavy metals The main producing area of lacquer tree is lacquer tree family, deciduous tree, up to 20 meters high The distribution of Rhus vernicifolia is widespread in China, which is generally in the mountainous area between 25 ° to 42 ° N and 95 ° to 125 ° E Qinba mountain area and Yungui Plateau are the areas where lacquer trees are concentrated Hubei, Yunnan, Sichuan, Guizhou and Shaanxi have the largest production, while Hunan, Jiangxi, Anhui, Zhejiang, Fujian, Taiwan, Shanxi, Hebei and other places also have lacquer trees In addition to China (which accounts for more than 80% of the world's production), Vietnam, North Korea, Japan, Myanmar and other countries also have a small number of lacquer trees At present, China's lacquer production is estimated to be about 5000 tons per year (for reference only) The main components of lacquer are urushiol (50-80%), gum (5-7%), water insoluble glycoprotein (1%), laccase (0.24%) and water (20-25%), among which urushiol is the most important evaluation index for the quality of lacquer, because urushiol is the most important film-forming substance Laccase activity directly affects the drying performance of lacquer Type of finished lacquer 1 Red matt paint (red enamel): it is made from the top coat of high-quality lacquer after oxidative polymerization and dehydration Generally, the solid content should be more than 95% 2 Black matte paint (black matte paint): it is made from the top paint of high-quality lacquer and iron-containing substances after oxidative polymerization and dehydration Surface drying for 2-4 hours, real drying: 24 hours, the paint film is black (with the unique black of lacquer, the blackness is particularly high), the gloss is black and bright as a mirror, the covering power is strong, and the adhesion is good Generally, the solid content should be more than 95% 3 Tizhuang lacquer (wipe varnish): it is made of raw lacquer by filtration Urushiol content: about 70%; it is suitable for hand cleaning of lacquer, rosewood, red sandalwood and other high-grade furniture and crafts 4 Lacquer (primer): it is made by filtering the lower layer of the original lacquer or the lacquer with lower urushiol content Urushiol content is relatively low, generally around 50% 5 Guangqi: it is made of filtered lacquer and polymerized vegetable oil The paint film is chestnut red, bright, elegant and transparent, and can show wood grain when applied on wood Mainly used for furniture surface covering 6 Color paint: generally, red brocade or transparent push polish is used as the base material, plus high-quality color powder, appropriate solvent (preferably high-quality camphor oil and turpentine oil) and a small amount of refined extracted vegetable oil After grinding, the appropriate fineness (≤ 80 μ m μ M = 0.001 mm) of color paint is achieved When preparing the color paint, the pigments with stable chemical performance, bright color, high covering power and can be applied to the paint (the pigment is another subject, which can be divided into coloring pigment, physical pigment, antirust pigment, metal pigment, ceramic pigment, pearlescent pigment, etc.) shall be selected The physical pigment (commonly known as filler) is not used for preparing the color paint The above is a complete knowledge of natural lacquer Those who don't know about lacquer may as well collect it They want to know more about lacquer and continue to pay attention to decoration Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,