[i8i8i8]

有什么方法或软件可以实现INdigo 打印的图是用青品黄三色输出不用黑的？
也就是CMYK、RGB的图打印都是由 青品黄三色 印制出来。

[cuiwy0603]

虽然我对INdigo机器不懂,但是按照印刷的原理,你这个想法是不可能的.
CMYK模式是一定要用到现成的黑色,不可能自动完成CMY+(C+M+Y=K)这种模式.
印刷机用CMY可以打印出来,条件就是K是用C+M+Y预先调好.
颜色的原理,先决条件是CMYK,这4个现成的颜色.
按照你的想法，彩色机只要用三个颜色就好了，何必用4个颜色？

[i8i8i8]

谢谢解答！
但我感觉不用按照理论的CMYK的单黑K来说，要是RGB转换成CMYK颜色也是色域区间内近似匹配。
RGB的黑或CMYK的黑也是能在，CMY色域内来近似匹配的吧。
只不过效果和实际文件有差别，只不过是多少的问题。

[nxxk]

打印機的驅動有選項可以選的你找找
用RGB模式印
有個選項用RGB合成K，所有K色都會拆成CMY

Coreldraw裡面
列印 > 色彩 > 輸出彩色為RGB (不要選CMYK)

[xiaoqing639441]

INDIGO数码印刷
应该可以吧，先印刷CMY色表，再测量，生成一个CMY的ICC，RIP分色时就只有三色，印刷时应该就行吧，对要求不高的产品应该是可以的。
好多快印公司直接印JPG图呢，市面上发的各种人流医院广告不也是。

记得做过几款农夫山泉？的果汁包装，大面积的专色块，只有很小的几个水果，我就是分成CMY三色，不用K印刷的，出来效果也还行，毕竟小，看不出，质量要求不高的东西就更没问题。

[kcdsw]

作者: i8i8i8

有什么方法或软件可以实现INdigo 打印的图是用青品黄三色输出不用黑的？
也就是CMYK、RGB的图打印都是由 青品黄三色 印制出来。

你说的这个功能叫EPM

按照indigo的原理，四色要4转，而epm只要3转，在单位时间内提高了生产效率。

最早这个功能是在ws系列的设备上推广的，使得6600原本30米每分的效率提高到了40米每分。

下面的简介摘自HP相关文档：

Customers would like to increase their operational efficiency by printing jobs using only CMY. By only using CMY colorants, the number of spreads printed per minute is increased. This efficiency comes at a small decrease in print quality due to the reduced gamut associated with removing the K channel.
A key objective of Enhanced Print Mode (EPM) is to print colors using CMY colorants rather than CMYK as is traditionally done. With one less separation being printed, pages can be printed faster and with reduced consumable costs (except for ink cost which can be higher). The penalty is reduce print quality due to reduced color gamut for dark colors, more difficult gray balance, and color registration issues for thin black lines and text which otherwise may be printed with black only

以下是限制：

4.1 No preseparated jobs
Preseparated jobs or VDP jobs with preseparated assets have already had the separations determined and any black separation will not be converted to CMY.
4.2 No VDP Jobs with CMYK or Gray SNAP fonts, TIFF, or JPEG assets
VDP jobs with SNAP fonts, TIFF, or JPEG assets are processed using special “readers” for performance reasons. CMYK or Gray color spaces for these asset types are passed directly to press CMYK and may contain black in the output.
4.3 No Separation or DeviceN color spaces that reference the “Black”
Separation or DeviceN color spaces that reference “Black” in the separation list are treated like an available spot color and will write directly to the Black separation without color management. This limitation may be removed if we could apply resources to create a “relatively simple” discrete fix to the DFE. But the assumption right now is no changes.
4.4 No mixed CMY and Black only pages in jobs.
4.5 No unrecognized spot colors with black used in the alternate color space.
Spot colors in the job which are not recognized Pantone colors and not in the Custom Spot Color Table will be emulated using the alternate color space specified in the job. These are typically specified as DeviceCMYK and if they contain non-zero values for black, the output color will not be correct.


想了想还是把文件贴上来吧，里面有EPM的介绍，以及hp原装的icc，我自己也做过一些类似的icc，效果嘛，哈哈哈，还行。

收10个coin 吧，等钱买资源呢。有兴趣的可以拿去研究研究，这个一通百通的东西。稍微搞过点色彩的应该都搞的来

[kcdsw]

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