The felt made by the felt factory is an excellent material from ancient times, so the cleaning method is of great importance. Let the manufacturer introduce how to clean the felt with hydrochloric acid! When you first felt in cleaning cleaning clay and pigment phosphate etc again dissolved aluminum complex cleaning with hydrochloric acid, sulfuric acid, 1000L water temperature in the 40 - 50 degree plus 2KG non-ionic surface active solvent and sodium tripolyphosphate 4KG washing 100KG felt each wash 10 20Min according to the net cleaning can be felt by resin shuipiao. A special solvent formulation is used for felt cleaning.