Talk:Rich black

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Paragraph on rick black usage[edit]

I suggest removing the paragraph about using rich black to avoid trapping issues. The situation described (black text on a colour picture) would be better handled by overprinting black text instead of using rich black (assuming the size of the text is fairly small). Rich black could reduce the likelihood of a white edge from misregistration, but is just as likely to create a coloured edge on one side of the type. Overprinting small type is a far more effective solution to this problem. I'm trying to think of another theoretical situation where rich black would reduce the need for trapping, but nothing comes to mind. Anyone else have an idea? Dave Laird 01:20, 20 December 2005 (UTC)[reply]

Well... overprinting can be problematic, so some people avoid it in their workflow. E.g. in PostScript in-RIP separation colours specified as CMYK do not overprint if the PostScript standard is correctly followed. If overprinting is acceptable in the workflow, it would give superior results. Notinasnaid 17:46, 22 December 2005 (UTC)[reply]

Requesting photo[edit]

A photo of key black and rich black side by side would be good to illustrate the topic of this article. Of course, images of the possible problems with rich black would be nice too but those would only illustrate a sub-topic within the topic and as such probably aren't as helpful in describing the article as the key black vs. rich black picture would be. BigNate37_(T) 19:56, 20 August 2006 (UTC)[reply]

unfortunately, 100K + any color = 000000 in RGB. This can be illustrated (aka "faked") by not using 000000 for the color that is meant to be 100K (Photoshop now does this) but it wouldn't be quite accurate.

Considering the article itself says that no black ink is truly black, I don't think "faking" would be innacurate at all. Are there any references to what the typical quality black ink would represent in RGB? Applekid 18:59, 8 March 2007 (UTC)[reply]

Photoshop[edit]

Good catch, Notinasnaid. I suppose I should have said "By default,..." before talking about Photoshop's default blacks. However, I think having the CMYK values listed are useful for illustrative purposes--if it can be worded to not sound redundant, maybe something like "With the default color settings, Photoshop's default black is..."? I find it very interesting that default blacks in different Adobe products don't match. And by "interesting" I mean "I have to explain this every month in the digital publishing class I teach when people print things from Illustrator or InDesign with placed PSDs and they don't match." :-)

Really bad article?[edit]

rich black is 60/60/40/100 (or 40/30/30/100)

edit* (and i just checked that the first one is way better than the 2nd one) — Preceding unsigned comment added by 83.179.164.105 (talk) 16:31, 18 June 2017 (UTC)[reply]

I've worked in the print industry for decades. 60/40/40/100 is the most widely used. http://tools.4over.com/richblack.html — Preceding unsigned comment added by 73.223.89.108 (talk) 00:56, 2 March 2022 (UTC)[reply]

Why inkjet do not >100% black ?[edit]

Why do inkjet printers not do like laser printers and just spray more black ink ?
I assume it is to leave time for paper to soak the ink and/or the ink to dry. — Preceding unsigned comment added by Musaran (talk • contribs) 05:48, 5 April 2020 (UTC)[reply]

What are these percentages?[edit]

Whatever these percentages are should be explained, because it doesn't make sense. 140.141.196.185 (talk) 00:56, 1 November 2022 (UTC)[reply]