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Problem converting colours

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Old 01-08-2013, 01:23 PM
stedders's Avatar
stedders stedders is offline
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Join Date: Feb 2011
Location: London, UK
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Problem converting colours

I have been supplied with the attached image.
I am working in a commercial print environment – this needs to print two colours (green uncertain of what PMS – but just call it custom green for the time being) and black – ideally it needs to be on transparent background.

The image I have been supplied has traces, very small traces, of the other process colours. Obviously I could just indicate to suppress these extra colours – but I would rather get it right. Could anyone advise on what would be the best strategy for removing these colours.

This is not really my line of work (in normal circumstances) – but I have tried deleting the other channels (which sort of works, but I lose my transparency) – I feel there is an obvious answer staring at me.

I just wish I knew what it was.

Help anyone?
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File Type: png Screen Shot 2013-01-08 at 20.12.22.png (80.7 KB, 76 views)

Last edited by stedders; 01-08-2013 at 01:34 PM.
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Old 01-08-2013, 09:04 PM
Steve13 Steve13 is offline
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Join Date: Jan 2009
Location: Central Florida
Posts: 203
Re: Problem converting colours

If I understand this right, I would select the black with the magic wand, select invert, cut and paste to custom color channel. If you lose your transparency you can double click the layer to get the layer style window, at the bottom, move the top right slider left a touch and it will drop the background bringing back the transparency.
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Old 01-21-2013, 02:59 AM
davidhaj davidhaj is offline
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Re: Problem converting colours

Is PS assigning a profile when you open the document? This could be affecting the other channels adding traces of colours as its been converted? Might be worth checking your color setting to see what PS is doing when it opens a document with a different profile etc..
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Old 05-21-2013, 08:45 AM
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pixel magic pixel magic is offline
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Join Date: May 2013
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Re: Problem converting colours

You will ned to recreate your image using 2 spot channels. you have the right idea. just dont use your CMYK channels as one of the spot colors. Or use your CMYK channels plus the spot, but just fill the channels you dont want with white.
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