Cellulose (2018) 25:3595–3607
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Fig. 2 Comparison of the surface of laboratory paper samples made from BSK pine pulp a uncoated (reference sample), b coated (NH), c coated (HA)— 10 min of heat treatment, d coated (HA)—40 min of heat treatment
Fig. 3 Effect of heat treatment time on the surface roughness of coated papers (the value for base paper is given as a reference)
Fig. 4 Effect of heat treatment time on the apparent density of coated papers (the value for base paper is given as a reference)
dissolution of the base paper cellulose by the concen- trated NMMO solution.
In Fig. 4, changes in the apparent density of studied samples of paper depending on the duration of heat treatment of the coating are presented. Time equal to
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