For lime soaking, first mix the bags of lime with water, pour it into the cement pool where the leather waste is placed, and soak it for three to five days.
After cleaning and stirring for three to five days, take out the lime-soaked leather, put it into the leather washing tank, and clean it with a leather washing machine. Usually after three or four hours of stirring, the originally dirty and hard waste leather becomes clean and soft.
Soaked in hydrochloric acid and then put into another pool, soaked again in hydrochloric acid for processing industry.
After boiling the melted glue and treating it with lime and hydrochloric acid, workers put the leather into plastic bags and put it in a boiler and added water to cook it. Usually after 6 to 10 hours, the colloid components in the leather waste are integrated into the water.
After cooling and bleaching, the glue-containing water is pumped into open iron basins in the open air and allowed to cool naturally. During the cooling process, the glue-containing water must also be beautified - ——Add hydrogen peroxide to sterilize and bleach, and the glue treated in this way will become quite beautiful.
After being dried and crushed and then cooled at low temperature overnight, the water in the iron basin will turn into pieces of bright yellow or dark yellow soft gel. The workers will then divide them and dry them into gel. board, and then put it into a grinder to crush it. At this point, the leather scraps have turned into shiny gelatin particles.