Tortoiseshell is a nourishing medicine that is well-known both at home and abroad. It is made of turtle shells. The tanning method is as follows.
1. Turtle shell processing. Take the turtle shell in the pool or cylinder, place it in the sunny place, add enough water to soak. When immersed, no longer change the water, the amount of water to keep the surface of the turtle shell submerged, stamped and sealed with slime, soak 4 to 5 weeks until the meat rot, the skin plate after the release of the drowning water, then add water, stir and rinse, The rinsing removes the black skin, soaks the rinsing turtle plate with water for 1 to 2 months, removes the booth and exposes it to the sun, turning it 3 to 4 times a day, allowing it to be dew or rainwater at night. Wait until dry.
2. Fry the gum. Pick up glue, usually before and after the beginning of winter. Take a foamed turtle shell, wash it in warm water, put it in a bamboo pot, place it in a pot, put it in clean water, heat and decoct it. The amount of water is used to submerge the turtle shell. When the water evaporation is reduced, the amount of boiling water can be added. After frying for 24 hours, remove the first frying sauce, add boiling water to the pan and fry it, so that it is decocted 3 times. When the residue is tapped and tapped, the juice is drained to the residue. Each time you take the decoction, put a layer of cotton on a fine sieve to filter it. Combine the filtrate three times into the cylinder. Take a little powder of alum, stir well, and let it stand for clarification.
3. Concentrate the plastic. Take the upper juice into the pot and heat it until the juice turns into a water jelly (about 50% moisture content). Use a micro-fire to boil, and use a rubber spatula to agitate the bottom of the pot to prevent coking or gumming. Spill; take another 250 grams of rock sugar to dissolve, filter and pour. When the water evaporates and the plastic color gradually turns yellow, another yellow wine is taken into account and it is poured warmly. After reducing the firepower, the glue can be initiated and the heat can be emitted. The glue gradually turns tan. At this time, use a plastic spatula to pick up a little glue and check until the glue is condensed and immediately stop heating, and stir it with a copper spoon to make the heat drop.
4. Cut and dry. Take thick plastic (rubber temperature 60 ~ 70 °C) into a small amount of sesame oil rubbing the copper plate, another take a little white wine, evenly sprayed on the plastic surface, to accelerate the plastic surface from the yellow foam. The plastic disc is then placed in a closed room, where it is allowed to coagulate, cut into strips, and cut into rectangular pieces. Turning once every 2 to 3 days, about half-dry, sealed in the plastic tank, so that the moisture contained in the glue can seep out, and then take out and put it in the shade. The surface of the finished product is dark brown, shiny, brownish to light, and has no smell.
Author unit: Agricultural Bureau of Xiangfan City, Hubei Province
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