其他
G7矫正方法与ISO12647
2011-12-16 16:56  ???:1907
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  G7(从打稿到印刷的色彩控制及校正方法)是由IDEAlliance研究出来的一个新概念,主要针对应用数码流程、分光光度学及电脑直接制版为本的印刷流程,更简单及有效实践ISO12647-2的印刷标准。今天,G7已经可以应用于所有四色印刷范畴,包括商业印刷、报纸印刷,甚至是柔版印刷及数码印刷。G7需要使用符合O2846-1规格的油墨,因此印刷得出的四个主色及三个迭印色的实地色度值(Lab)可以达到非常接近ISO的要求。有别于现时以网点增大值(TVI)及实地密度值作为印刷目标去控制色彩,G7是利用视觉外观方法、控制灰色的重现及量度中性灰色的浓度及色度值来逹至一个由打稿至印刷,接近视觉吻合的色彩表现效果。G7的命名,其中的‘G’是指以灰平衡为基础的校正技巧,‘7’是指七个ISO印刷主要颜色的要求。