This standard specifies the method for the determination of the total ash content of leather sulfate and the ash content of insoluble matter in sulfate water. This standard applies to all types of leather.
QB/T 2719-2005 history
2005QB/T 2719-2005 Leather-Chemical tests-Determination of sulphated total ash and sulphated water-insoluble ash
1984QB/T 3812.14-1999 Leather.Determination of sulphated total ash and sulphated water insoluble ash