How to process Tianma fine

Gastrodia elata should be dug and harvested along with the processing, because the storage time is long, Gastrodia elata is easy to run pulp and reduce the drying rate. Especially spring hemp can not be stored. The temperature is high in spring, and it will be moldy if it is not processed in time. When processing, first rinse the soil with clean water, then wipe off the water with a cloth, and then put it into the pan to stir-fry with the fine sand. According to the size of the pot (No. 1 or No. 2 pot), stir-fry each pot with fine sand. According to the size of the pot (No. 1 or No. 2 pot), put 4-7.5 kg of fine sand and 1.5-2.5 kg of Gastrodia elata in each pot. It should be processed according to the size of Gastrodia elata. In the process of processing, if the processing is not graded according to size, some will be fried and scorched, and some will not be fried well, which will affect the quality of the finished products. When processing, the stove should be on fire, and when the sand in the pot turns red (put scraps of paper, leaves, etc., immediately catch fire), put Gastrodia elata into the pot and turn it constantly with a shovel. If the time is short, Gastrodia elata is fried until it is scorched and endogenous. when you hear it as loud as roasted corn, take it out immediately, then put it in a prepared cold water basin and use a bamboo knife while it is hot. Split it into 4-6 pieces of bamboo with a diameter of about 33 centimeters. This kind of knife is used to scrape the skin of Gastrodia elata, which is commonly used in the processing of medicinal materials.) gently scrape off the rough skin, wash it and put it in alum water and float it for about 10 minutes. Then put it into the empty basket, dry the water, put it into the Kang sieve and put it on the Kang. At first, the temperature on the Kang should be 50-60 ℃. After baking for 2-3 hours, it will rise to 70-80 ℃. When baking to 60% to 70% dry, take it out and flatten it with a plank. If there is flatulence, pierce it with a bamboo needle, let it out and then flatten it. Finally, bake with charcoal fire and sulfur until fully dry, that is, a translucent milky yellow finished product.

The advantage of this processing method is that after high temperature processing, only the epidermis of Gastrodia elata is scraped off, and the internal marks of the epidermis are still intact and brightly colored. At the same time, at the end of boiling, the internal drug components of Gastrodia elata have not been damaged, and the finished product is of high quality, so it is known as "snow Gastrodia elata".