GB/T 40490-2021Technical terms in raw lacquer and decorative technique (English PDF)

3.1 Raw lacquer

The latex-like exudate obtained from the cut of the phloem of the sumac is composed of urushiol, nitrogenous compounds, laccase, gum, trace elements, moisture and so on.

Note: Raw lacquer is also called national lacquer, large lacquer, earth lacquer, mountain lacquer, tree lacquer, plant lacquer, and natural lacquer. After curing, the raw lacquer coating has good heat resistance, abrasion resistance, acid resistance, water resistance, Humidity resistance, organic solvent resistance, temperature change resistance, insulation, light preservation, anti-oxidation, antibacterial, antibacterial and other functions, and are widely used in light industry, military industry, chemical industry, national defense, marine industry, etc. Coating and protective protection of engineering, agricultural machinery, textile industry, electric power engineering, architectural design and arts and crafts.

3.1.1 Chinese lacquer

Raw lacquer obtained from Toxicodendronvernicifluum (Toxicodendronvernicifluum).

Note: Chinese raw lacquer is also called national lacquer. The urushiol content accounts for about 45% to 75% of the total amount of lacquer; the gum content accounts for about 5% to 7% of the total amount of lacquer; the nitrogen content contains The amount is about 1% to 5% of the total amount of lacquer; the moisture content is about 15% to 35% of the total amount of lacquer. Mainly produced in China, Japan, South Korea and other regions have Cultivated.

3.1.2 Annan lacquer

Raw lacquer obtained from Toxicodendronsuccedance.

Note: The wild sumac is also called Annan sumac. The urushiol content of Annan lacquer accounts for about 40%~45% of the total amount of lacquer; the gum content accounts for about 15% of the total amount of lacquer~ 25%; nitrogen content accounts for about 1.5% of the total amount of raw lacquer; moisture content accounts for about 25% to 45% of the total amount of raw lacquer. Mainly produced in southern China, Vietnam, etc. area.

3.1.3 Burmese lacquer

Raw lacquer obtained from Glutausitata in southern Myanmar.

Note: The urushiol content of Myanmar lacquer accounts for about 55% to 70% of the total amount of lacquer; the gum content accounts for about 5% to 7% of the total amount of lacquer; the nitrogen content accounts for about 5% to 7% of the total amount of lacquer. 0.1%~0.2% of the total amount; the moisture content accounts for about 30%~35% of the total amount of lacquer. Mainly produced in Southeast Asia such as Myanmar, Thailand, Cambodia and Laos area.

3.2 Dog days lacquer

Raw lacquer harvested during dog days.

Note: Fuqi is also called Sanfuqi and Futianqi.