How can we clean the stains on the plaster mold?

How can we clean the stains on the plaster mold?

Due to the long time of plaster mold production in gypsum line equipment or too little attention during storage, stains will be stained. The star gypsum line can be processed according to the situation.

For small stains, it can scrape the thin layer on the surface lightly with a small knife. If ink stains are stained and deeper, it is necessary to dig out the ink spots, then fill them up with the adjusted gypsum, and then dry them out, and then use plain sand paper to smooth them. The plaster will be filled with the plaster mould hue, which will affect the beauty. In this case, the whole statue can be repeated.

Method to add water plaster is: put 50 grams of lime stir in 1500 ml of water, then the gypsum products soak 3 to 10 minutes, and then removed, washed with water 2 to 5 times, after drying, then sprinkle some chalk, plaster will like before white.

If the gypsum line traces for many years, very dirty mold, cannot use the method for processing. Gypsum line mold can be immersed in the proportion of 1000 ml of soapy water plus 10~30 ml of ammonia water, gently wash for about 20 minutes, remove and clean it with clean water. If it's really dirty, it can't be cleaned with this method. It can be coated with a layer of imitation copper color on the plaster mold and make it into a copper imitation statue, which is more elegant and unique.