| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-coating paper type light weight printing paper good in white degree and opacity and having surface strength capable of bearing off-set printing.SOLUTION: There is provided a printing paper having basis weight of 75 g/mor less, containing black pigment and fluorescent whitening dye by paper making (except multi-ply paper making ) a paper material to which the black pigment and the fluorescent whitening dye with the content of the contained black pigment X (g/m) in a range of 0.001≤X≤0.01, the content of the contained fluorescent whitening dye Y (g/m) in the range of 0.03≤Y and average primary particle diameter of the black pigment D (μm) in the range of 0.05≤D≤0.5.SELECTED DRAWING: None |
