Mold proofing treatment of finished paper

Chemical products used for mold-proofing can be applied to the surface of the paper or board at the size press, coater, water box or some other surface treatment. The obvious advantage here is 100% retention of the moldproofing agent onto the product and better efficiency. The disadvantage is exposure to biocide and in some cases no such feed point exists. Biocides may also be added to the pulp slurry. In this case, the product or blend of products must adhere to the fibers. This is referred to as the product s substantivity. 

An aqueous solution of carbamate [II, 11] which is effective under both alkaline and acid conditions is effective against algae, bacteria, fungi, and pink slime. However, the carbamate chemistry does not adhere to 

Similar tests (TAPPI, AFNOR) are also performed to check the mold proofing efficiency of paper treatment 

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