Since SIZEOMNI 40S is cationic can be used in combination with weakly cationic auxiliaries. For adding SIZEOMNI 40S, the pH of solution should be 4. For enhance the SIZEOMNI 40S performance, cationic fixing agent should be required. Application of SIZEOMNI 40S in the size press changes the wet ability of the paper and reduces its water absorption. The presence of aluminium ions in the base paper is not necessary for obtaining optimum results. Since SIZEOMNI 40S is cationic, it cannot be applied in the size press with fluorescent whiteners and normal dyes or basic dyes. Only cationic dyes can be added in the solution. The normal drying temperatures on the paper machine are sufficient to develop full sizing. No additional curing period is required. SIZEOMNI 40S has good stability in the presence of large quantities of electrolytes. SIZEOMNI 40S can be added batch-wise to the starch solution storage tank as well as continuously in the operating tank or the feeding pipe to the size press. SIZEOMNI 40S is low foaming, so defoamers are normally not required.