1. Observe the appearance.
The fibers of high-quality bird's nest are clearly visible, the texture is clear and the thickness is different, and the higher the density, the better. The filaments inside the bird's nest should be messy and loose. The shape of the top bird's nest should be complete and large (about the size of three fingers). When the swallow builds its nest on the roof beam, the bird's nest takes the shape of a boat;When nesting in the corners of walls, bird's nests are triangular in shape.
2. Observe the color.
Due to the influence of the swallow's food and natural environment, the color of the bird's nest will vary. There are several grades of bird's nest quality, but the highest quality pure bird's nest is golden yellow, and the naked eye can tell if the bird's nest is adulterated with other substances.
3. Smell the smell.
High-quality bird's nest has a faint fishy smell and Xylella smell. Counterfeit bird's nests are usually adulterated with fishmeal, tapioca flour, white fungus and other substances, and smell sour, fishy, chemically irritating or greasy.
4. Blister test.
After the bird's nest is soaked, slitted, and picked, the ratio of the weight of the dried to the weight of the dried goods is called the soaking rate. The soaking rate of high-quality bird's nest is generally between 5-8 times. Natural bird's nest has a strong ability to absorb water, and it can be completely soaked in about 2 hoursThe edible gum in the brushed bird's nest foams slowly, and it takes 4-6 hours to completely soak it. After soaking, the bird's nest will have a small amount of fine hairs, and if it is found to be hairless and extremely clean, it may be manually rinsed.
5. Taste the taste.
Natural bird's nest has a slightly fishy smell, and the fishy smell is stronger after soaking in water. Fake bird's nest is like pigskin, even if it is neutralized by egg whites, the oily smell after frying is still difficult to hide. Bird's nests that have been processed with chemicals may have a chemical smell after stewing, so you need to be cautious about them.
6. Precautions.
Bird's nest is not 100% dry, and the dry bird's nest in the market usually refers to 98% dryness. When buying bird's nest, you should pay attention to the active ingredient content of the bird's nest, not just the ** and weight. It is necessary to comprehensively consider factors such as the moisture content of bird's nest and the proportion of edible gum in order to make a wise choice.
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