How to deal with "old" black plaster

The traditional production of black plaster is divided into five steps: extraction, refining, dripping into paste, removing "fire poison" and spreading. Among them, refining is the key to refining plaster, and refining is usually judged by the standard of "dripping into beads". If the oil refining is "old", the plaster has high hardness and low adhesion, and it is easy to fall off when attached to the skin. According to the treatment method of traditional Chinese medicine pharmacy: at this time, appropriate amount of tender oil can be added to adjust. One Dan and two oils, thick plaster, three times, three times, boiling to remove slag, dripping into beads, leaving the fire, Dan cooked, cold water underground, its shape is black as paint, hot is soft, cold is hard, stick it, pull it out. Technical essentials to be mastered in boiling plaster: 1. Don't use too much or too little explosives. If it is not enough, the effect will not be easy to find. If it is too much, it will affect the viscosity of the plaster. 2。 Pay attention to the temperature and dosage of Dan. Low temperature affects the combination of Dan oil, and the color is dull. The fire is flammable, and a small amount of Dan Nen is easy to lose, which does not play a fixed role. When the amount of Dan is large, the paste is old, crisp but not sticky, and it is easy to fall off after application. 3。 Zu said: the black work of plaster is boiling, and the bright work is stirring. After pouring Dan, stir it constantly, and stir it with a fan or a fan, so that the gas generated when the oil Dan is combined can run away as much as possible, and the plaster will be bright and sticky.