Sustainability 2023 , 15 , 2850
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Results of microscopic analysis of impurities on the surface of the tested paper are presented in Figure 1. Significant amounts of impurities were observed on the surface of papers produced from mixed wastepaper due to the higher content of impurities in the pulp.
White wastepaper 1.1
Whitewastepaper 1.2
White wastepaper 1.3
White wastepaper 1.4
Mixed wastepaper 1.5
White wastepaper 2.1
White wastepaper 2.2
Mixed wastepaper 2.3
Mixed wastepaper 2.4
Mixed wastepaper 2.5
Mixed wastepaper 3.1
White wastepaper 3.2
Figure 1. Microscopic images of wastepaper surfaces.
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