Ejiao is made of furnace skin, and a catty of Ejiao can only be boiled with about 3.5 kilograms of furnace skin. At present, a kilo of furnace skin is around 50 yuan, which means that it takes 175 yuan to cook a kilo of donkey-hide gelatin, excluding labor and other expenses.

Basic identification method of true and false donkey-hide gelatin

◆ Packaging

"Fu" brand and "Dong 'azhen" brand Ejiao are beautifully packaged and have clear patterns. The packaging of counterfeit goods is often printed roughly, and typos and missing words often appear, and the production batch number is often wrong.

◆ Anti-counterfeiting label

Authentic "Fu" brand "Dong 'azhen" brand Ejiao has been labeled with anti-counterfeiting labels since1June 1999165438+1October. After scraping off the anti-counterfeiting coating, you can see the unique anti-counterfeiting password. Consumers first call to check the authenticity.

◆ Block shape

"Fu" brand and "Dong 'azhen" brand Ejiao have two specifications: 3 1.25g/ block (thin block) and 62.5g/ block (thick block). The size and thickness of the film are uniform, the block is square and smooth, the surface is bright, there are longitudinal stripes of coarse cloth friction, and there are no oil holes and air holes. The font on the film is square and generous, the words "Dong 'e Town, Shandong Province" are printed on the film, and the words "Shandong Ejiao" are printed on the thick film. Counterfeit products often have different film sizes and thicknesses, different block weights, oil holes and air holes, and skewed fonts on the film. ◆ Hardness and brittleness

Take "Fu" brand and "Dong 'azhen" brand Ejiao and pat it hard on the table and break it into several pieces, that is, "hard and brittle", which keeps the traditional characteristics of "fragile when something happens". Counterfeits are usually tough and not fragile, and can even be bent.

◆ Smell

Crushed "Fu" brand and "Dong 'azhen" brand Ejiao will have a slight smell (gelatinous smell), and it will have a gelatinous smell after boiling, and the counterfeit will have a fishy smell after boiling.

◆ Dissolve genuine "Fu" brand and "Dong 'azhen" brand Ejiao, crush it, stir it with hot water, it is easy to dissolve completely, and no granular foreign matter can be seen by naked eyes. Fakes are not easy to dissolve, and some appear insoluble flocs. There are often foreign particles visible to the naked eye in the melted glue.

◆ Freezing characteristics

Authentic "Fu" brand "Dong 'azhen" brand Ejiao is stewed with water and then cooled to a frozen state, while counterfeit products often do not solidify.

◆ Chemical analysis