one of which is for reference only

Does the retarder formula have fixed raw materials? Or is it formulated on a case-by-case basis? I don’t know anything about this, so I’d like some advice. Retarders are mainly weak acids and salts such as tartaric acid, boric acid, phosphates, etc., molasses such as glucose, fructose, etc., and ordinary water-reducing agents such as lignocalcium,…