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I was given a logo by a client and last year I vectorised it, but it was coloured up as per the original, which was fine for her digital printing jobs. This year she wants some merch done, and the printers I am contacting are all asking for the logo to be four spot colours / or three spot colours.

This is a new area for me, and I am looking for some advice please on how to achieve this.

Or are there any agencies who would do it for a small fee?

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    How is the logo? What are the colors? and how many colors really have? Are you using gradients? What printing process they will be using? Ask the printer itself if they can do it. But you need to aproove it. – Rafael Oct 20 '15 at 14:35
  • Welcome! If you add an image of the logo to your question that would help. – Dre Oct 20 '15 at 15:15
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    I see you've tagged this as a Photoshop question, but it's worth noting that Illustrator is the better tool to use when working with vectors – JohnB Oct 20 '15 at 16:23
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Based on those print requirements, it sounds like you're trying to have your logo screen printed. The printers are asking for this because they want the artwork in a suitable format for the color separation process. To facilitate that, your logo needs to be constructed using exclusively spot colors.

Depending on how complicated the colors in your logo are, that might mean that you need to sacrifice some detail. Here's a quick example to show why:

Color reduction example

Pumpkin courtesy of publicdomainvectors.org

You could regain some of the pumpkin's detail with some fine-tuning and adding in more shadows, or you could even use halftones to simulate gradients. Specifically for a logo though, I think you should just avoid gradients when reducing it to spot colors.

  • What a nice transformation of the pumkin. :o) – Rafael Oct 20 '15 at 19:19
  • Howabout dark brown instead of black? – joojaa Oct 21 '15 at 12:14
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Here is a different spin on @JohnB's separating the original into 4 colors. In Photoshop,I converted the original image from RGB into index mode and forced the design to render as 4 colors only. Next I converted back into RGB mode and created new spot channels from the 4 colors. The spot color separations are not half tones. No color overlaps another color.

enter image description here

With the separations as I created them, they are appropriate for screen printing or offset printing.

If anyone is interested in seeing the actual separations file, Here is a download link

4 COLOR PUMPKIN INDEX SEPS

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Basically they printers deal in no more than 4 colours per image. With the version you "vectorised" just change the logo to either 1 colour or as little as possible (but no more than 4).

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    "No more than 4" is relative. Some can print 6 or more. How about a cmyk process and 2 methalic ones? :o) I've seeing tshirts with at least 6 colors. – Rafael Oct 20 '15 at 14:33

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