I'm working with Ai CS3 and CS6 (two different jobs). CS3 mostly. I often have to convert RGB or CMYK bitmaps to SPOT COLORS because printing house don't use standard CMYK method of printing. They are using only Pantone colors.I was wondering is there any method that helps me with converting tat kind of projects? I have to create Pantone Colors image that have to be almost identical with original image received from customer.
At this moment I'm using Photoshop to that proces using color range selections and saves them as additional channel. That is sometimes very hard process. But if I can make it I'm placing that PSD file in Illustrator.
Is there any possinility to convert bitmap directly in Illustrator and simulate specific pantone colors?
I have to say one more thing. Machines are of course limited in terms of colors quantity. There is 8-colours offset. Usually I and my colleague creating "PMS images" containing no more than 3-4 colors. In exceptional cases we are using more colors.
Mayby there is some plug-in that helps in that kind of separation process? We have got to much work to play with Photoshop channels and have to find sone solutions that accelerate our work.
I look forward to the answer.Thanks in advance. Regards!
That looks quite interresting, but as I seen Phantasm CS converting only vector objects. And what about images?
For an example. That kind of images:
http://naturalneoczyszczanie.pl/wp-content/uploads/2011/08/aloes_lisc. jpg (green and black, mayby two greens and black)
http://static.tumblr.com/gy6mkin/xp5ld4e21/985chilly_pepper.jpg (3 colors, red, green and black)
should be done in max 2-3 colours.
Will Phantasm CS handle that kind of images?
My typical workflow for duo- tri-toned Photoshop images is to simply convert to grayscale in PS, choose dutotone, change the Pantone spot colors as desired and then adjust the curves as needed. I find this far faster than processing color ranges.
If you have an older version of Photoshop like I do, I save the PSD, but also save a PS PDF version and place the PDF version in AI. Spot colors come in great. Any of the newer versions of PS that are using the PantonePlus libraries, one can simply place the PS version.
Take care, Mike
A quick Photoshop try that takes less than a few minutes for each image just to get you started. Spending more time and some manual localized retouching should make it better, like reducing the cast shadow under the pepper to mostly black
Steps to reproduce.
Convert the image to Multichannel mode. Double click the icon of a channel in the Channels panel, in the dialog click the swatch to open the Color Picker, click the Color Libraries button and select the desired libraries from the Book menu. Photoshop will suggest closest match. For the image of the pepper from the automatic suggestion I only change the cyan to black. and for the aloes image I changed the suggested magenta to black. I also made a quick Curves adjustment on the channels of this image.
....printing house don't use standard CMYK method of printing. They are using only Pantone colors....
This really doesn't make sense. If one can load a spot ink into a press's inkwell, one can load a process ink into it.
For example: Despite the separation channels in the Post 7 example being designated spot inks, the printing process would still be essentially the same as CMYK process. Each separation channel will be a grayscale image which requires halftoning.
So is your printing house's limitation that they are only limited to using spot inks (as stated), or is it really (as I suspect) that they are limited to line art ( i.e.; can't do halftones)?
Unfortunately, I do not decide how the printing press works. Send pryedstawione wzgldają promising methods, but unfortunately there are a few "buts". First of all, the colors can not be mixed and applied at each other, and if they do, they must do it as little as possible. Otherwise, the ink will not be cured. This is not the method used to print on paper or film. We print on plastic tubes for cosmetics, creams, etc. We use only Pantone Solid Coated color library.
emil emil, when I look on Your separations in case of all images there is almost 100% coverage of colors im the same spots. If I prepare bitmap like this I will have to print 3 colors at the same spots. I need to avoid that. There is one more thing that bothers me in Your method. Colors (in case of pepper) looks quite less brighter than an original.
Well AiKedar, the additional information you gave makes this another story. Without multiple shades of the same and overlapping colors you are literality restricted to 3 shades. I tried the index mode in Photoshop with noise dithering using only 4 colors (one is the white for the background) and I got something like the attached image. Higher resolution will make the dithering less visible. I'm also attaching a close up part of the image to show the build. With only 3 color shades there is not much you can do but you can convert the image to index mode and then use the Color Table from Image > Mode in Photoshop to play with different 3 color combinations. After you decide, the colors can be easily selected and converted to 3 pantone channels.
... the colors can not be mixed and applied at each other, and if they do, they must do it as little as possible. Otherwise, the ink will not be cured. ...
This process is called dry offset. Colours must preferably not overlap because if they do they tend to get muddy in long runs. Ink gets transferred back from the plastic substrate and slowly makes its way back to another colour’s ink well. Curing is not really the problem.
Dry offset works best if you use simple solid shapes. Halftones of more than one colour should be avoided and precise register is almost impossible because of the inevitable slip between rubber transfer roller and substrate. This is especially true of conical packaging.
This means that a precise fit of abutting pixels like Emil suggests will not work well.
Hmm, I made a search for dry offset samples and find some that are apparently done with a press that seems to be quite capable.
I haven't done jobs for this kind of printing and can't tell what's possible but based on what I see, my advice is to ask the printer to provide samples of what they can do with 3 spot colors and then choose, design, and prepare images accordingly.
Unfortunately, I do not decide how the printing press works.
No one said you did. But it's your responsibility to understand the nature of whatever design limitations are imposed by the printing method for which you are designing. That's what's missing in this whole thread.
If the limitation is actually one of line art vs. contone, that is an entirely different thing from process color vs. spot color, as was initially posted.
Thanks for every single reply. I do not have almost any experience with dry offset. Project I was making was designed for standard process.
Can anyone help me with preparation project to that kind of offset printing?
OK, I Was made some searching. I found some software that can solve manz problems. I have been working on DotSpy. It can delete overlay colors. But there is one quite big problem. That software is dedicated only for Apple users.
Had anybody seen that soft? Maybe there is some similar software for PC computers?