THOSE WHO have been working in this industry for 25 years or longer will recall that in the old days there was only one SC-grado of paper - the so-called Immaterial -available in either 60 or 65 g/m2 and then lightweight coated (LWC),as well as a few grades of heavier coated papers that were used for the covers of our magazinesThings have changed fundamen -tally since those days.The paper indus try today offers a finely graded range of SC papers with different basis weights,grades of whiteness and surface roughness,as well as a full range of light-and medium-weight coated papers right up to woodfree grades.
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机译：那些在该行业工作了25年或更长时间的人会回想起过去，只有一种SC级的纸张-所谓的“非材料”，可用60或65 g / m2的纸张，然后进行轻涂（ LWC）以及用于我们杂志封面的几种等级的较重铜版纸-从那时起，情况已经发生了根本变化。今天，纸工业尝试使用不同基重，等级的SC纸进行精细分级。白度和表面粗糙度，以及各种轻薄和中等重量的涂布纸，最高可达无木浆等级。
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