What is ass hide glue made of

Ass hide glue is a traditional tonic made from donkey skin through boiling, concentration and other processes. The main raw material is donkey skin, supplemented by rice wine, rock sugar and other auxiliary materials. The production process of ass hide glue includes the steps of raw material processing, decocting and extracting glue, concentrating and collecting glue, cutting and drying. It has the effects of enriching blood, stopping bleeding, nourishing yin and moistening dryness.

I. Selection of raw materials

The core raw material of ass hide glue is high-quality donkey skin, and dry skins of healthy adult donkeys should be selected. Traditional craftsmanship requires uniform skin thickness and no damage, with black donkey skin being preferred. Modern production also requires microbiological testing of raw materials to ensure compliance with pharmaceutical standards. Collagen in donkey skin is the main component of ass hide glue.

2. Soaking and Cleaning

Donkey skin needs to be soaked for a long time to soften and remove fur and impurities. The traditional method involves soaking in clean water for several days, during which the water is changed multiple times and residual fat is scraped off. Modern technology will add food grade alkaline solutions to accelerate softening, while using mechanical cleaning equipment to improve efficiency. This step directly affects the purity and taste of the final product.

Thirdly, the donkey skin treated with

should be slowly boiled over low heat for several tens of hours to fully hydrolyze collagen. Traditional techniques use copper pots for direct fire boiling, while modern methods often use steam jacketed pots for temperature control boiling. During the process, it is necessary to constantly stir to prevent burning, and add yellow wine in batches to promote the dissolution of effective ingredients. The boiling time and temperature directly affect the viscosity and effective ingredient content of ass hide glue.

4. Concentrate and collect the gel

decoction. After filtration, transfer it to a concentration pot, add rock sugar and other auxiliary materials, and continue boiling until it reaches the flag state. At this stage, it is necessary to accurately control the rate of water evaporation to achieve the specified specific gravity of the adhesive solution. The traditional testing method is based on the ability of the adhesive to hang on a wooden shovel and form a thin film, while modern methods use a refractometer to measure concentration. Excessive concentration can affect the solubility of the finished product.

Fifth, after forming and drying [SEP], the concentrated adhesive solution is poured into a shaping container and naturally condensed, and cut into standard sized adhesive blocks. Traditional ass hide glue needs to be dried in a cool and ventilated place for several months. Modern technology uses a low-temperature drying oven to accelerate water evaporation. The finished product needs to pass multiple quality tests such as moisture content, ash content, heavy metals, etc. The high-quality ass hide glue has a smooth amber cross section and is brittle, hard and fragile.

ass hide glue, as a medicine food homologous product, is recommended to be taken according to the constitution under the guidance of Chinese medicine practitioners. Daily storage should be placed in a cool and dry place, and can be refrigerated in summer to prevent softening. When taking, add Congee or soup after closing, and match with walnuts, black sesame and other ingredients to enhance the tonic effect. For those with yin deficiency and excessive fire, it is necessary to use a combination of nourishing yin and reducing fire herbs. During periods of cold and fever, use should be temporarily suspended. When selecting and purchasing products from regular manufacturers, avoid purchasing inferior or adulterated ass hide glue.