QB/T 2723-2005 Leather chemical tests - Calculation of tannin penetration, leather quality and combined tannins

This standard specifies the calculation method of tanning penetration, leather quality and combined tannins of vegetable tanned leather. This standard is applicable to vegetable tanned leather. QB/T 2723-2005 Leather chemical test Calculation of tanning penetration, leather quality and combined tannins QB/T2723-2005 Standard download decompression password: www.bzxz.net

ICS58.140
Classification number, Y45
Preparation number: 15775-2005
Light Industry Standard of the People's Republic of China
QB/T 2723—2005
QB/T3R12.18—1999
Chemical tests-. Calculation of degree of tannage.leather substaace and bond organic 2005-03-19 Issued
National Development and Reform Commission of the People's Republic of China 2005-09-01 Implementation
1 Scope bzxZ.net
QB/T2723—2005
Calculation of leather chemical test thickness, leather and binding substances This standard specifies the calculation method of the thickness, leather and binding substances of the model. This standard is applicable to plant leather content.
2 Terms and definitions
The following terms and definitions apply to the standard.
Bound substance
The substance that is bound to anti-collagen and not submerged in water in the plant content. 2.2
The sum of the leather and its combined substances.
Thickness
The number of membrane substances bound to each 10 parts of leather. 3 Calculation
3.1 Combined spiny matter
Total content, the value is expressed in %, calculated by formula (1): Combined release (%) = 100 (%) - [cortex (%) + aquatic organic matter (%) + total ash (%) + hydroxyl radical extract (%) + iodine extract (%) 3.2 Total quality
Total quality, the value is expressed in %, calculated by formula (2): Total quality (%) = Total quality (%) + combined spiny matter (%) 3.3 Transparency
Total transparency, the value is expressed in %, calculated by formula (3): Total content (%) × 100
Transparency (3) -
4 Expression of results
Cortex (%)
The result is retained to one decimal place, and the result of transparency is retained as an integer. ..()
QR/T2723-2005
5Test report
The test report should include the following contents:
a) Standard number;
b) Sample name, number and type;
e) Calculation results;
The differences between the actual operation and this standard. d)
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