GB/T 38408-2019Leather—Identification—Method of microscopy (English PDF)

1 Scope

This Standard specifies the method of microscopy for the identification of leather.

This Standard is applicable to the identification of various types of leather and its products; leather fiber board may take this as a reference.

2 Normative References

The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document.

GB/T 22889 Leather - Physical and Mechanical Tests - Determination of Surface Coating Thickness

QB/T 2262 Terms of Leather Industry

3 Terms and Definitions

The following terms and definitions are applicable to this document.

6 Sampling and Specimen Preparation

7 Identification Process

Place Specimen A flatwise, with the surface facing upward, under the microscope, so as to observe its surface. Place Specimen B flatwise, with the longitudinal-section facing upward, under the microscope, so as to observe the structure of the longitudinal-section tissue. In combination of the characteristics of the surface and the longitudinal section, conduct comparative identification analysis with the reference samples or pictures (see Appendix A), so as to confirm the texture of the leather.

NOTE 1: during the identification, pay attention to the differences between the longitudinal-section structure of the leather, and leather fiber board and commonly-seen synthetic materials (see Appendix B).

NOTE 2: the pore arrangement of the leather grain is the most important characteristic information of identifying the type of leather.

For specimens with a relatively thick coating or transfer film layer, in accordance with the stipulations of GB/T 22889, the thickness of the coating or the transfer film layer of Specimen C, and its percentage of the total thickness may also be determined; in accordance with the requirements of 8.2, issue the identification results. […]