GB/T 7643-2018Sticklac (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 7643-1987 "Lac collagen." This standard compared with GB/T 7643-1987 main technical content changes are as follows.

--- Adjust sampling method, instead of using other standards;

--- Increase the color to determine the standard color card (PANTONE);

--- Adjust the time of the heat-hardening time and two quality requirements;

--- Adjust the color index of the quality requirements;

--- Glue thickness, heat hardening time, volatiles (moisture), hot ethanol insoluble, color index five indicators of measurement, instead cited Use other standards

--- Increasing the test rules in the test classification and test items;

--- Increased storage and transportation environment temperature requirements.

1 Scope

This standard specifies the quality requirements of Shellac glue, sampling, test methods, inspection rules, signs, packaging, storage and transportation requirements.

This standard applies to the insects in both winter and summer generations of the host tree secreted by the host tree after harvest harvest, remove the tree Sticks, dried for the production of particles shellac, shellac products such as the use of shellac.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 8142 shellac product sampling method

GB/T 8143 shellac product testing methods

GB/T 35805 Shellac glue

3 Quality requirements

Lac collagen should be air-dried, free of branches, sawdust and sediment and other impurities, no mold, caking metamorphism, the technical indicators should be consistent with Table 1 Given the quality requirements.

4 Sampling

According to the provisions of GB/T 8142.

5 Test methods