High-quality shrimp skin, clean skin, Huang Liang shiny. Neck and body together, shrimp eyes, complete figure. Grab a hand and release it, and the shrimp skin can be released automatically.
Deteriorated shrimp skin, the shell is filthy, pale or dark red, the shape is incomplete, there are many pieces, and it smells musty. Hold the shrimps tightly before releasing them, so that the shrimps stick together and don't scatter easily.
2 How is the shrimp skin processed 1. The processing method of raw shrimp skin is basically the same as that of cooked shrimp skin, which requires high freshness and large and tidy shrimp body. Drain the cleaned fresh shrimp, sprinkle it thinly on the mat, turn it over when it is 40% dry, and put it away when it is 90% dry. Raw shrimp must be processed in sunny and dry weather, and it is easy to smell the shrimp skin on cloudy days with high temperature. The yield of raw shrimp skin is generally around 20%.
2. Processing method of cooked shrimp skin (1) Raw material treatment: shrimp should be graded according to freshness before processing, so as to avoid mixed fish and dragons and reduce the quality of finished products. Raw materials should be fresh and free of impurities such as sediment. Sediments and other impurities, if any, must be sorted out and cleaned. When cleaning with a bamboo basket, first put 5-8 Jin of shrimp into the basket, and then put it into a vat or wooden bucket filled with clean seawater for cleaning. When washing, one hand holds the rim of the basket and swings left and right in the water, while the other hand gently flips the shrimp in the basket, allowing the sediment to flow out of the basket hole and sink to the bottom. When washing, pick out impurities such as small miscellaneous fish. After washing, take out the basket and drain it.
(2) Boiling: add a proper amount of water into the pot, add 6% salt according to the weight of water, put the raw shrimp into the pot after the water is boiled (the ratio of shrimp to water is 1: 4), take it out and drain it after boiling. In the process of cooking shrimp, it is necessary to remove the floating foam in the pot in time. Each pot should be properly salted to maintain the concentration of salt water. When boiled to about 8 pots, the soup is turbid, and fresh water should be replaced immediately.
When draining and cooling, do not shake the shrimp basket, otherwise the shrimp will be loose, which will affect the draining effect and accelerate the qualitative change of semi-finished products, especially in rainy days.
(3) Drying: The cooked shrimps should be fully drained and dried after cooling. Shake the shrimp basket loose before drying the shrimp, and scatter the shrimp evenly on the mat. When the shrimp is 40% dry, turn it over with a wooden rake and turn it evenly to avoid deterioration due to different drying. When the weather is dry, it can be dried for about half a day. When it is 60% to 70%, it can be folded and stored for 2 days, and when it is 90%, it can be packaged. It is very important to master the dryness of shrimp skin, which is too dry and brittle and not delicious; Too wet can easily lead to deterioration and cannot be stored for a long time. The yield of cooked shrimp skin is generally around 25%.
(4) Packaging: After the dried shrimps are dried, they should be properly screened to remove the broken chaff. It is required that the packaging is easy to transport and not easy to be damaged, and the packaging should be padded with moisture-proof materials to prevent the shrimp skin from moisture absorption and deterioration.
What are the benefits of eating shrimp skin? In fact, there is an important nutrient in shrimp skin-astaxanthin, which is the strongest antioxidant found at present, also called super vitamin E. The redder the shrimp skin, the higher the astaxanthin content, and the astaxanthin content in shrimp skin is about 400-800ppm.
Blood pressure is negatively correlated with calcium content. Appropriate supplementation of calcium-rich shrimp skin can control blood pressure for some patients without any drugs, just by increasing calcium intake. Calcium also helps to lower blood cholesterol and improve premenstrual syndrome in women. In addition, calcium supplementation in the diet can directly inhibit the proliferation of colon cancer cells and make them tend to be normal after 2-3 months.
In addition, calcium is especially important for women in reproductive period. The third trimester of pregnancy is an important stage in the development of fetal bones, teeth and nervous system. Once calcium deficiency, it is easy to cause osteomalacia, hypocalcemia convulsion, pregnancy fatigue and hypertension syndrome, as well as premature delivery or fetal underweight.
4 how long does the shrimp skin soak? Generally speaking, shrimp skin can be soaked in warm water for 3 ~ 5 minutes before eating, and then washed twice with clear water. Doing so can remove excessive salt and possible fine sand. In addition, it can also remove some odor of shrimp skin itself, so that the cooked dishes are fresh and tender. Secondly, it can reduce the content of nitroso compounds in shrimp skin, thus achieving the purpose of reducing carcinogens.