Talk:Color printing
From Wikipedia, the free encyclopedia
 |
This article is supported by the Color WikiProject.
This project provides a central approach to Color-related subjects on Wikipedia. |
 |
|
| B | This article has been rated as B-Class on the quality scale. | ||
| High | This article has been rated as high-importance on the importance scale. | ||
|
Article Grading: |
|||
The values on your chart look fine. They would both produce black. So no color changes would occur. --Dkroll2 18:05, Dec 27, 2004 (UTC)
Contents |
[edit] Seperation images
The seperation images are great. Any chance of getting an image of the final product besides that super-grainy one at the end? I think it'd be incredibly useful. :-) — Frecklefoot | Talk 17:34, Dec 29, 2004 (UTC)
I like the separation images too, but should the last image in the separation series look so sharp? Maybe it would look better if a filter was run over the final image to simulate a composite CMYK screen so it looked more like a printed image? addesso 06:36, 23 Apr 2005 (UTC)
[edit] Mixing colors and screening
The sections on halftones and screening are good, but they really treat only the subject of reproducing photos, not other art. It's also incorrect to say that colors can only mix in halftones. I can print solid yellow and cyan in the same place on the paper to produce a "kelly green." In short, some additional information and clarification is needed or this article is somewhat and incomplete and possibly misleading. DavidH 00:58, July 12, 2005 (UTC)
This sentance I pasted below, in the article is so not good in so many ways. I'm too old and tired to write the pages of explanation it would take to justify its deletion. Perhaps some "Wiki" can assist here...?--Dkrolls 12:49, 15 May 2006 (UTC)
"Today's digital printing methods do not have the restriction of a single color space that traditional CMYK processes do. Many presses can print from files that were ripped with images using either RGB or CMYK modes. The color reproduction abilities of a particular color space can vary; the process of obtaining accurate colors within a color model is called color matching.
[edit] Fix this text anyone with more patience than I to explain why it is wrong
Here is the sentance from the article:
"The process of color separation occurs when the original artwork is digitally scanned and separated into red, green, and blue components. Before digital imaging was developed, the traditional method of doing this was to photograph the image three times, using a filter for each color. However this is achieved, the desired result is three grayscale images, which represent the red, green, and blue (RGB) components of the original image:"
Here, I will begin: 1. The words "digtally scanned" have no actual meaning. Unless some new magical technique other than capturing the image data at each point through red, then green, then blue filters had been replaced by some new method with the advent of what we call a "scanner" Just because the capture device is no longer silver-halide, and now each data point is assigned a numerical value, does not allow the words "digital scanning" to be any more appropriate in this day. (p.s. yes, I'm aware of multi-spectral scanning. Yes, I know that mosaic arrays don't capture RGB at every point, blagh blagh, just sombody fix this article. Golly Wiki's are really addicts. I am gonna give this wiki stuff up for good. It's too addictive, and peolp jsut continually put bad info over good. I realize it's just enthusiasm, but it is dissapointing when you had discussions through Wikipedia with color scientists from across the globe until an article is close to pretty darn good, and then 2 years later it looks like someone started over, and all they had was a 6th grade education, or maybe just a massive ego. God bless you all. I gotta get out of here or I'll get pulled in again!
p.s. all the photos of the separations I made around 2004. You should redo them all since I think I was wasted and the origianl image of the girl may be a test image from Kodak, or Fuji, etc. Start with an image that has many colors, and has some monitor colors in it, like chartruse green, so when you talk about the CMYK it will demonstrate the gamut compression. The halftone screens are a great idea, but there is not enough area to even make out that the image exists within those huge dots. Make the dots just big enough so they can be seen, then draw a magnifying glass over a portion. You know what I mean. Go for it you "Wiki" crazy's.
Oh, yeah, and don't use a photograph. The artwork repro folks get mad. Maybe start with a photo and then make it look like a painting in Photoshop, but don't forget to add that splash of vivid monitor green color.--Dkrolls 13:27, 15 May 2006 (UTC)
[edit] Inverting?
If inverting the RGB channels gives the CMY channels, why do the CMY separation pictures look completely and utterly different from the inverted RGB pictures?
