... , improve paper printing surface strength and sizing degree; at the same time, it can reduce the cost, ... sulfate)3). Dosage and Methods-- dosage: subject to different size, one ton of paper need 0.5-2.5 ... C, slowly add the well-measured sizing agent, at the same time, stir the mixture smoothly for ... contain oppositely ion in the same position, and at the same time.--The product does not contain harmful ...