FIELD: glueing materials. SUBSTANCE: surface sizing of paper and cardboard is carried out by treatment with aqueous solution containing carbamidoformaldehyde resin and technical lignosulfate following by drying. Aqueous solution contains components indicated at the following concentration as dry matter, wt.-%: carbamidoformaldehyde resin 75-92, and technical lignosulfonate 8-25. EFFECT: improved method of sizing. 1 tbl
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