Old glue is better than new glue, and the color of old glue is yellow. According to the meat quality, it can be divided into dark yellow, golden yellow and so on, without fishy smell. The new flower gum is light in color and slightly fishy. The glue concentration of the old glue is reduced, and the nutrients are more easily absorbed by the human body, and the effect is better. Of course, the premise is that the chewing gum is effective, and those plant gums are no different from the new ones even if they are old.

Second, look at the number of rubber heads.

The larger the size, the thicker the colloid, and the better the quality of the same variety of glue. Expensive gutta percha is generally counted separately. The amount of gutta percha is based on the amount of 1 kg. The less gutta percha per kilogram, the bigger and heavier the single product, and the better the quality.

Third, look at the color of the glue.

Real glue is not all uniform color or all white. Only translucent, natural lines and uneven amber are the top grades that have not been bleached. Nowadays, in order to pursue the beauty of flower glue, many sellers bleach it with bleach, which has actually destroyed the healthy essence of flower glue. Choosing primary colors, natural textures and bloodshot glue is the real good glue.

Fourth, look at the degree of dryness and wetness of the glue.

You can take a picture under the lamp when you buy glue. If the glue is translucent, the quality is better. Chewing gum with high humidity is dark and dull, and even some chewing gum is not dry enough. Generally, the periphery is transparent and the center color is turbid, which is the "flower heart". Avoid choice. Of course, at the same price, the drier the gum of the same variety, the better.

Look at men and women in Hua Jiao.

Some glue can be divided into male glue and female glue. The male glue is thin and soft, and it is not easy to dissolve in the entrance. The mother glue is thick and sticky. Judging from the time of stewing, males are more resistant to stewing than females; When the number of heads is similar, the male is better than the female, and the price is also expensive.