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A. Appendix
107
Print surface
The characteristics of the face side and reverse side of a sheet of paper may vary a little.
Usually, the opening side of the ream of the paper package is the print side. Follow the indications on the
paper package. Typically, the print side is indicated by an arrow.
Moisture content
Moisture content is the amount of water left in the paper after manufacture. It is one of the important
characteristics of the paper. This can change greatly depending on the storage environment, although usually
paper contains about 5% water by weight. Because paper often absorbs water, the amount of water can
sometimes be about 10% in a high humidity environment. When the amount of water increases, the
characteristics of the paper changes greatly. The fixing of the toner may become worse. For storage of the
paper and during use, we recommend that the humidity of the surrounding environment be between 50% and
60%.
Rough estimate of basis weight
g/m
2
lb
Bond Index
60 16
64 17
75 20
90 24
105 28
120 32
135 36
161 43 90
200 53 110