特殊用法average shading1.平均浓淡, 平均明暗度black shading1.黑斑blue shading1.蓝色阴影colour shading1.彩色发暗, 底色不均匀, 彩色黑点corner shading1.(光栅)角阴影fixed shading1.固定荫影green shading1.绿色阴影horizontal shading1.水平“黑斑”补偿, 行黑点补偿magnetic shading1.磁屏蔽parabolic shading1.抛物线形黑斑raster shading1.光栅黑斑, 光栅亮度不匀sub rosa price shading1.内定折扣(略低于牌价)tilt-and-bend shading1.镶嵌幕缺陷校正vertical shading1.垂直荫形, 光栅纵向亮度不匀