How to identify the quality of bird s nest with different classifications

With the increasing demand for bird's nest, the bird's nest market has entered China on a large scale, but the bird's nest market is mixed, and the quality of bird's nest is also uneven. Therefore, it is necessary to distinguish carefully when purchasing, and it is recommended to buy bird's nest with a traceability code. (Traceability Code:

In order to regulate the bird's nest market, China requires that each bird's nest sold needs to have its own ID card "traceability code", full traceability supervision, import registration, port inspection and quarantine. Legal security is guaranteed. "Traceability code" is the core standard for legal import inspection and quarantine.

Traceable bird's nests are also different due to different shapes**

1.Bird's nest: Bird's nest is selected from many bird's nests with a more complete body or boat shape, different shapes and sizes, **more expensive, its nutrition, fragrance, hair are the best.

After a simple picking process, the complete bird's nest is clean, with few impurities, good color and good quality. Depending on the grade, the premium bird's nest is of the best quality, with a large, intact shape and tight fibers.

1-3 years old new bird's nest: cm wide, suitable for daily beauty conditioning.

3-5 years old adult bird's nest: centimeter wide, good nutrition and quality, suitable for pregnancy.

Old bird's nest more than 5-8 years old: the width of the cup is centimeters, and the acid content of bird's nest is 2 times that of new bird's nest, which is suitable for pregnancy and lactation.

The nest built by the old Yan Wang for more than 8 years: the width of the cup is centimeters, and the quality and nutrition are excellent. Consumers and gift-givers who pursue high quality.

2.Bird's nests: In the process of harvesting, picking, packaging or transporting, some of the coarse pieces of bird's nests that are cut and crushed are bird's nests. The taste of bird's nest is slightly worse than that of bird's nest, because there is no cup type at all, and the appearance is poor, so it is **lower than bird's nest.

3.Bird's nest: Bird's nest refers to a very fine filament in the bird's nest, which is filament-like and is generally priced by variety.

The taste of bird's nest is worse than that of bird's nest and bird's nest strips, and the bird's nest is more broken after stewing, and there are more impurities. The price of Yansi is also relatively low, which can meet the needs of low-price consumer groups.

4.Bird's nest crushed: Bird's nest crushed refers to the small bird's nest crushed during the picking or transportation. Bird's nest crushed contains more impurities, and the hair is very small, and many have been oxidized, the nutritional value is only about 1 5 of bird's nest, it is recommended not to buy.

5.Bird's Nest Cake or Bird's Nest Ball: Bird's nest that is broken up by workers during harvesting, and the bird's nest is pressed into different shapes, such as diamond, spherical, half-moon, rectangular or spherical, etc. The quality of bird's cake or bird's ball is relatively poor, and it is a low-end product, so it is recommended not to buy it.

The grade of bird's nest is divided into six indicators: safety certification, production date, cleanliness, completeness of the cup, dryness of bird's nest, and stewing time.

1.Buying bird's nest is the first thing to be safe. Since bird's nest is not produced in China, bird's nest is an imported product.

When buying bird's nest, you must check whether it is legally imported. Whether the bird's nest manufacturer is a processing plant certified and registered with the China Certification and Registration Supervision Commission. Whether the importer is a registered import enterprise, makes a purchase through a legal sales channel, and asks for a purchase invoice at the time of purchase, as a basis for protecting its rights in the future.

2.Pay attention to the production date of the bird's nest on the traceability code; The main thing is to evaluate the origin of the bird's nest: the bird's nest harvested at different times also has different "hair".

3.Pay attention to the cleanliness of the bird's nest picking: 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 required to pick the bird's nest. So the grade is higher.

4.Pick type: whether the horns at both ends of the bird's nest are complete and properly trimmed.

All the grains on the bird's nest should be attached to the horns at the end. The thickness of the base of the bird's nest should be less than 1 4 of the height of the bird's nest. Of course, the higher the height of the original bird's nest, the rarer the yield, so the higher the **.

5.It depends on whether the bird's nest is dry and light: those who are dry and contain less water are the top quality.

Legal importation of bird's nest requires that the absolute moisture content of the bird's nest must be less than 15%, which is known as foot dryness in the traditional bird's nest industry. High-quality bird's nest should feel dry to the touch. Wetter bird's nests contain more water, and bird's nests are more likely to breed microorganisms and produce peculiar smells, or nitrite in bird's nests is prone to be too high.

6.Stew: Of course, it refers to stewed bird's nest, after the good bird's nest is soaked, the stewing time only needs to be put into the pot and stewed in water, after the water is boiled, turn to low heat and simmer for 30 to 40 minutes, after stewing, there will be a strong protein fragrance coming to the nose, which is an important indicator of real and fake bird's nest.

Fake bird's nests will not have such a fragrant albumin. Chemically processed bird's nests tend to turn into watery form if they take too long during the stewing process.

1. Look: The high-quality bird's nest is bright, with less down, the periphery is neat and the inside is like a melon, and there are bird's nest feet at both ends; The bird's nest is irregular half-moon-shaped, 7 10 cm long, about 10 cm wide, and concave into a pocket; The outside is white or yellowish-white, the mucus is condensed into a layer, arranged more neatly, and the bulge is more delicate and wavy. The texture is hard and brittle, and the cross-section is keratin-like.

2. Touch: Good bird's nest is dry and elastic, and wet, heavy, soft and non-tough.

3. Smell: The dried bird's nest is fragrant and mildew-free, and the stewed bird's nest is like peeling off the egg white smell of a hard-boiled egg.

4. Good bird's nest has a "hair" after water immersion, which can be expanded by 7 or 8 times, and the water immersion is hard or faded.

1. Comparison by texture

1.The denser ones are classified as the top bird's nests, and the sparse ones are secondary. Generally, the complete fiber of the caulcular type is compact as the first grade, and the incomplete fiber of the caulcular type is not compact as the second grade.

2.According to the division of the bowl shape, the complete and uniform shape of the bowl is better.

2. Comparison according to the type of bird's nest

1.Official Bird's Nest: The first stage of bird's nest with a complete shape and few impurities is usually called "official bird's nest" and "tribute bird's nest". This bird's nest is the most nutritious, with few impurities and a good taste.

2.Mao Bird's Nest: A bird's nest that contains more bird's feathers, or second and third stage bird's nests. The nutritional content of this bird's nest is not as good as that of official bird's nest, and there are many impurities, which is not easy to handle.

3.Swiftlet's nest: A bird's nest built in the grass, mixed with a lot of grass clippings, the worst quality.

3. Bleaching and dyeing identification

Normal bird's nests are pale yellow, beige or light grey with natural brown spots. However, the bleached bird's nest will leave a certain chemical smell, and the one that is not bleached will have a natural light fishy smell. Severe bleaching will damage the internal structure of the bird's nest, and the texture will still be very hard after soaking for a long time.

Fourth, brush glue

The purpose of brushing glue is to increase the weight of the bird's nest, and to apply edible glue and hanging paste on the inside and outside of the bird's nest and at the bottom. In order to make the bird's nest dense. The surface of the bird's nest is reflective and dense, and the color and texture of the surface of the bird's nest are unclear, which is integrated, giving people a feeling of impermeability.

Put it in the water and rub it with your thumb and forefinger several times, and your fingers will feel sticky and sometimes smell chemicals.

Please take a closer look: 1. According to the quality of bird's nest, the order is divided into blind official swallows, hairy swallows, and grass swallows.

2. Official swallow: The first bird's nest with a dull and bright guess shape and intact ant type, and very simple and less impurities is generally called "official swallow" and "Jianqing Gong swallow". This bird's nest is the most nutritious, with few impurities and a good taste.

3. There is also a traditional way of terminating the high-quality white swallow in the first stage as the official swallow.

4. Wu Dou Mao Bird's Nest: A kind of bird's nest containing more bird's feathers, or the second and third stage bird's nests. The nutrient composition is not as good as that of the official swallow, and there are many impurities, which are not well handled.

5. Grass bird's nest: a kind of bird's nest built in the grass, mixed with many grass clippings, the worst quality.

Preferred Malay bird's nest, after the professional group dust and the team of the ecological base bird's nest management of the bird's nest quality is good, Chang Yan Anju's stewed bird's nest is like this, a hand of bird's nest origin directly picked, return to the quality of fresh first-class bird's nest standard.

1.Look: See if there are gaps in the bird's nest (due to the dehairing process, it is impossible for the bird's nest to have no gaps, and the gapless ones are generally more serious in gluing); whether the soaking rate is between 7-9 times (it is not normal for the soaking rate to be too low or too high, because the soaking rate of some adulterated substances is far from the bird's nest); If each one is the same, white, and very beautiful, it is likely to be bleached or fake (bird's nest is natural, it is impossible to be very perfect, and it is impossible for each one to be the same); Looking at the light or under a magnifying glass, the real bird's nest should be able to clearly see a trace of lines.

2 Smell: Bird's nest has a unique fragrant fragrance, but there is no strong smell. Those with a special smell and a fishy or greasy smell are fakes.

3 Touch: Real bird's nest is formed from swiftlet saliva and has a noticeable rough hand sensation to the touch, while fake bird's nest is very smooth to the touch.

4 Bubbles: The bird's nest will expand after soaking in water, and after being soft, take the silk strip and pull it, the elasticity is poor, and it will break when it is pulled. Rubbing with your fingers, if you don't have elasticity to make a paste, it's also a fake; After soaking in water, the water quality of real bird's nest is still clear, while fake bird's nest has other ingredients that cause turbidity when dissolved in water.

Reference: Xin Yan Bird's Nest.

Bird's nest is a thing that is about 4 centimeters in diameter and resembles raw silk in color. Connoisseurs usually divide bird's nests into three categories, namely the red "blood bird's nest"; The white "Guan Yan" and the black "Mao Yan".

Blood swallows are the least and most precious; "Guan Yan" is the nest made by Dong Yan for the first time every year; The most inferior quality is "Mao Yan", which contains a lot of impurities and must be removed before it can be eaten. Artificial bird's nest is cheap, and some operators treat it as genuine and sell it to customers. Good bird's nest is arranged in strips, which are silvery-white after water immersion, and crystal clear and elastic (gently pulling will stretch); If it appears yellow, it is a fake.

How to identify good and bad bird's nests? How to judge the quality of bird's nest? Bird's nest classification types.

Tips for identifying bird's nests.

Look: Bird's nest should be a filamentous structure, and the one composed of a sheet structure is not a real bird's nest; Pure bird's nest is translucent under light**;

Smell: Bird's nest has a characteristic musky smell, but no strong smell. If there is a fishy smell and a greasy taste, it is a fake;

Touch: Take a small piece of bird's nest and soak it in water, take the silk strip and pull it after it is soft, the elasticity is poor, and it will be broken as a fake when you pull it, rub it with your fingers, and it is also a fake if you have no elasticity to rub it into a paste.

Bird's nest without brushing has a clear feeling of rough hands to the touch, while bird's nest with brushed pulp generally looks shiny on the surface. Here to explain, it is not that there is a gap or there is no slurry, and now more and more counterfeiters still brush the pulp, but will deliberately leave a little gap out. Some masters like to widen the bird's nest to appear wider, and some masters will have one more shaping process to pinch the bird's nest tighter, so that the gift box will be more beautiful.

Through the method of looking, the real bird's nest structure is filamentous, the fiber is very clear, and it is translucent to the light, and the bird's nest is not thick, while the fake bird's nest treated with glue has a smooth surface, the fiber is adherent, and even flake-like, and it will be slightly reflective when placed in the sun or light, and the bird's nest is thick. The pure hand-sorted bird's nest is completely soaked in water before picking the hair, and then placed on the mold to dry, so that there will be no marks on the bird's nest. However, some fake bird's nests are made with tweezers to fix the shape of the bird's nest, so there may be traces of clips on the edges of the bird's nest.

However, the glued fake bird's nest fibers have been calcified, so they can't be soaked completely for a few hours, and the water is yellow, the fibers are strands, and they emit a strong chemical smell and musty smell. Look at the color of the whole bird's nest, if it is particularly white and there is no impurity, it is not excluded that it is soaked in artificial medicine, and it is also necessary to look at the form of the bird's nest after soaking, the real bird's nest should be filamentous rather than paste-like;

Then it is gently soaking the two ends of the bird's nest, it is easy to bend is very moisture, this kind of bird's nest is not high after soaking, and it will be broken when it is broken, rub it with your fingers, and it will become paste, which is a fake. High-quality bird's nest should feel dry to the touch. Wetter bird's nests have more moisture and can become moldy if not stored properly.

Pay attention to the loss rate and the markup on the packaging. It should be bought at a reputable store and read the origin and quality assurance certificate. Indonesian bird's nest accounts for 80% of the world's bird's nest production, and the nest factory Indonesian bird's nest is clean and full, delicate and lubricated, and fragrant.

For non-laboratory identification of bird's nest, please grasp the following points: Bird's nest should be a filamentous structure, and it is not a real bird's nest composed of a piece structure; Pure bird's nest is not completely transparent, but translucent, whether it is soaked or under light**. Bird's nest has a unique fragrant aroma but no strong smell.

Those with special smell, fishy smell or greasy taste are fakes; Take a small piece of bird's nest and soak it in water, take the silk strip and pull it after it is soft, the elasticity is poor, and the one that breaks when pulled is a fake; Rubbing with your fingers, if you don't have elasticity to make a paste, it's also a fake; Lighting the dried bird's nest pieces with fire, if it is a real bird's nest, there will never be any crackling sparks. 、

The characteristics of real bird's nest are: fragrant taste, easy to stir, sweet taste, **high, relatively easy to buy; The color of real bird's nest is not particularly uniform, and sometimes it will have a yellowish color.

There are a lot of fine hairs, which are grayish-white, have a strong flavor, have poor elasticity, and belong to a translucent state. The color is very uniform.