1, pigskin material. It is hemispherical, yellow and white, and dull. It is composed of transparent irregular particles or filaments, which are honeycomb-shaped. Some are mixed with variegated hair, and occasionally short pig hair is attached to it. Without elasticity, it will break when pulled, loosen when soaked in water, and have a greasy taste after a long time. Put a little on the alcohol lamp and burn it, it will burst into sparks, crackle, have black smoke and burnt smell, and the soot will turn black, forming a tumor.

2. Tremella residue. The fake bird's nest made of tremella residue expands quickly after soaking in water, with poor elasticity and no bird's nest flavor.

3. Malaysian chewing gum. The fake bird's nest nutrient solution made of Malaysian gum is easy to produce light brown precipitation.

4. Algae gum and fish skin. The fake bird's nest made of seaweed glue and fish skin can be faked in appearance, but it tastes bad and has no bird's nest smell.

In addition to the above four kinds of fake bird's nest, not all real bird's nest are good, and now there are many adulterated bird's nest. Adulteration level is not bad!

1, brush the bird's nest with glue. Coat the surface of bird's nest with fillers such as edible glue. Glued bird's nest generally looks shiny on the surface. It feels smooth, the walls are seamless and thick. The handle of bird's nest without brushing is obviously rough, and the wall of the bird's nest has gaps left by picking hair, and the wall of the bird's nest is thin Nowadays, more and more counterfeiters still brush the pulp, but they will deliberately leave a gap. In fact, in the process of bird's nest processing, the master's final shaping method is different. Some masters like to widen the swallow cup to make it wider, and some masters will add a plastic process to make the bird's nest tighter, so that the gift box will be more beautiful.

2. Bleached bird's nest. Bleach the bird's nest with liquid medicine. Bleached bird's nest is white and uniform in color, because bird's nest is a natural food, and the color should be yellow and white, which is natural. Not every lamp is the same color!

3. Adulterated, ground and swallowed. Because the broken swallow does not have a complete cup-shaped bird's nest, it is difficult to distinguish the authenticity. Some unscrupulous vendors will mix real broken swallows with things like seaweed glue and fish skin. This kind of bird's nest is white, with little luster, thick and hard, and has the smell of seaweed. Natural bird's nest strips are transparent, slightly yellow, shiny and odorless.

In addition to the appearance and smell, adulteration can also be found in the process of foaming. Good bird's nest can generally be soaked for 7-8 times, while inferior bird's nest will be soaked for less. It may be 3-4 times or even smaller. A good bird's nest is sweet and smells like protein.