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对在浆料中加入直接黄和直接紫两种染料能否提高纸页不透明度进行了小试,并且与浆内只添加直接黄时的不透明度进行了对比,结果表明,加入直接黄和直接紫染料能够明显提高纸页的不透明度。
A comparison of the opacity of whether the addition of direct yellow and direct violet two dyes in the slurry can increase the opacity of the paper sheet was carried out and compared with the opacity just when the direct yellow was added into the pulp. The results show that adding direct yellow and direct Violet dye can significantly improve the opacity of the paper.