How to identify the quality of ass hide glue

The quality of ass hide glue can be identified by observing its appearance, smelling its odor, testing its solubility, checking its certification mark, and understanding its source of raw materials. High quality ass hide glue is uniform in color and dark brown. It is hard, crisp and free of impurities. It has a light gum smell and is easy to dissolve in hot water. It has a regular production batch number and is made of pure donkey hide.

I. Appearance

The surface of genuine ass hide glue is smooth and shiny, the edge is translucent amber, and the section is smooth without pores. Poor ass hide glue is white or yellow, and there may be cracks, impurities or unevenness. Ass hide glue can be observed against the light source. The high quality ass hide glue has even light transmittance, and the inferior products often have a sense of turbidity.

II. Smell

The real ass hide glue has a unique gum fragrance, similar to the smell of soybean oil, and has no foul smell. Fake and inferior products may have a pungent odor or chemical taste, and some of the inferior ass hide glue mixed with horse skin and pig skin will have an obvious fishy smell. The ass hide glue block can be gently rubbed and heated to smell the smell, and the authentic flavor is more obvious.

III. Test the solubility

Take a small amount of ass hide glue fragments and put them into hot water. High quality ass hide glue will be completely dissolved within 15 minutes, and the solution is light reddish brown without precipitation. The low-quality ass hide glue dissolves slowly, the solution is turbid or has suspended solids, and some adulterated products will agglomerate. The dissolved ass hide glue liquid should be able to re coagulate into frozen state after cooling.

IV. Check the certification mark

The package of regular ass hide glue must be marked with the drug production approval number, such as the batch number beginning with the national drug approval letter Z. Check if the packaging bears the GMP certification mark and geographical indication protection product mark. You can check the authenticity of batch numbers on the website of the National Medical Products Administration to avoid purchasing products with three no records.

V. Understand the source of raw materials

The raw materials of authentic ass hide glue should be the whole black donkey skin. The donkey skin from Dong'e County, Shandong Province has better quality because of its water quality and technological advantages. Beware of products marked with "new ass hide glue" or "yellow gelatin", which may be boiled with other animal skins. When purchasing, the merchant can be requested to provide proof of raw material traceability.

For daily purchase of ass hide glue, it is recommended to choose regular pharmacies or brand exclusive channels to avoid purchasing products whose price is significantly lower than the market price. When storing, it should be placed in a cool and dry place to prevent moisture and deterioration. Before taking it, consult a traditional Chinese medicine practitioner for diagnosis and treatment. People with yin deficiency constitution are suitable for winter supplementation, while those with damp heat constitution should use it with caution. Ass hide glue can be used with yellow rice wine or taken with black sesame and walnut to enhance the blood tonic effect, but it should be stopped during cold and fever.