Quarantine & Inspection Standard for Donkey Skin Salt free dried donkey skin:
 1, Out side: Grey or light brown without hair, except head and tail; Inner side: Grey or light brown without tendon, membrane, fat, meat, bloodstain, impurity. Smell: light smell of raw meat.
 2 Cub skin within 5%. Physical depilation method, chemical method strictly forbid. 3, No sand or soil. 
4 No skin horse, mule no skin, no chemical processed, not Putridity / rotten, no moldy, not moth-eaten. 
5. Moisture: less than 15%. 
6 Logistical:  stored in a dry and ventilative warehouse.