1, look at the color
Bird's nest is generally divided into three colors: gray, yellow and blood red (Bai Yan, Huangyan and Xueyan respectively). After artificial bleaching, yellow dyeing and red dyeing, the fake bird's nest will be too white and red compared with the bird's nest of the same grade, and it will look abnormal and contain chemical odor.
Step 2 smell it
Normal bird's nest smells of mildew, egg white or ammonia, mainly because canaries like to nest in dark, humid and sultry environments, which will make bird's nest moldy for a long time; The smell of ammonia water is because there is feces mixed in the golden nestle, and ammonia gas is released by fermentation under certain conditions. Therefore, normal bird's nest will have a certain musty smell, egg white smell, fishy smell and ammonia smell. Fake bird's nest will smell of chemicals in color and smell pungent.
Soak in water
In order to distinguish between true and false bird's nest, we can soak the bird's nest in water to distinguish between true and false. After the bird's nest is soaked, it is spun, the real bird's nest is soft and elastic, and the fake bird's nest is weak and easy to break. Take out a small part and rub it between thumb and forefinger, which will become mushy or have a chemical smell.
Step 4 look at the base
When we buy, we don't always choose which bird's nest is bigger and whiter. Bird's nest like this is often prone to maternity leave. Generally, the bottom of bird's nest contains a lot of swallow hair, which is troublesome to select, so it will be removed.
Step 5 taste
Protein contained in bird's nest accounts for more than 50% of bird's nest, so normal bird's nest will have an egg white flavor when cooked and eaten, and the taste is smooth; False bird's nest or bird's nest treated with glue will have sour taste, chemical taste and fishy smell after cooking, which makes people feel uncomfortable.
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