2. Immerse the gum-coated bird's nest in water and take it out. After about half a minute, rub it with your thumb and forefinger several times, and your fingers will feel sticky and sometimes smell chemicals.
3, the fake bird's nest has a special fragrance that is not strong, accompanied by greasy taste and fishy smell.
4, visual identification of bird's nest: pure bird's nest is translucent filiform structure, which does not change after soaking or lighting, and fake bird's nest is mostly flaky structure.
5, fire identification of bird's nest: use fire to ignite bird's nest pieces, fake bird's nest will produce crackling sparks due to impurities in the combustion.
6, distinguish the bleached bird's nest: soak the bird's nest for half a minute, rub it with your hands several times, the fake bird's nest will make your fingers have a chemical taste, no bird's nest egg white taste, and the foaming rate after stewing is not good. Bleached bird's nest.
Extended data:
Buy:
First, buying bird's nest is the first priority. Because bird's nest is not produced in China, it is an imported product.
Second, pay attention to the production date of bird's nest; It can mainly evaluate the hair head of bird's nest: the bird's nest picked in different periods also has different "hair heads".
Third, pay attention to the cleanliness of bird's nest hair: generally speaking, the less fine hair, the better. Because the cleaner the bird's nest, the better the quality of the bird's nest, and the higher the manpower, so the grade is higher.
Fourth, it is the pick-up type: whether the horns at both ends of the bird's nest are complete and properly trimmed. All stripes on the swallow cup should finally be connected to the swallow horn. The base thickness of swallow cup should be less than 1/4 of the height of swallow cup. Of course, the higher the height of the original bird's nest, the rarer the output, so the higher the price. ?
Baidu encyclopedia-bird's nest