Plaster Retarder

Three most common types of retarders: organic acids and their soluble salts, alkaline phosphates, and protein retarders. The retarders of organic acids and their soluble salts mainly include citric acid, sodium citrate, tartaric acid, potassium tartrate, acrylic acid and sodium acrylate, among which citric acid and its salts are the most researched and the most effective. Citric acid and its salts can achieve a strong retarding effect when the dosage is small. Phosphate retarders mainly include sodium hexametaphosphate and sodium polyphosphate.