SelectJet & copyjet films on an Epson 4450 imagesetter

Positivity imagesetting systems using seletjet, copyjet screen positives.
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Colour Management

Whether you are screenprinting, litho printing or are digital printing, it is crucial to get the colour right, your client expects it.

Colour management for screenprint, flexo, litho & inkjet prepress

In colour management all colours are referenced to a theoretical colour model Lab.  In this way, the RGB of a monitor can be converted to the CMYK of a printer with maximum accuracy.  This is done via ICC profiles, small text files that contain a database of CMYK and RGB values relating to the colour that they produce.

If you have a colour in your DTP programme, the colour management module converts the colour to RGB values for the monitor and to CMYK for the printer.  In this way you can 'soft-proof' the job on your monitor, produce a digital proof on your printer and have confidence that the finished job will look OK.

There are limitations to the process, your eye can see a vast array of colours, a photograph slightly less, a monitor much less and a CMYK print a small fraction of the total.  Dealing with the 'out of gamut' colours can be the difference between success and failure.

Positivity can produce high quality ICC profiles and guide you through the correct usage.  We can explain the limitations and give you the tools to minimise them.

Mouse-over to see the difference a custom profile can make. See what can be done with the correct colour management, the scanned photo on the left was produced using an 'out-of-the-box' profile.

The 'mouse-over' photo is the same photo printed with a custom profile, the difference is whiter whites, punchier colours and happier clients.

The original probably wouldn't be rejected but the custom profiled is just visibly better.

Produce Progressive Proofs to guide your press:
Produce the cyan plate, cyan/magenta plate etc.  Your pressman can't make a mistake!

Progressive proofing gives your screenprint operative a good chance of getting the colour right Print cyan, then cyan/magenta etc. If the cyan is right there's a good chance that the rest will follow. Print screenprint proofs from your imagesetter Wasatch RIP with actual halftone patterning
C CM CMY CMYK

Use Spot Colour Replacement and a Colour Atlas to get Pantone colours correct.

Positivity - for your colour needs.

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 Wasatch SoftRIP has been developed for the production of positives    Selectjet and Copyjet are class-leading acetate imagesetter films for screenprint separations     Epson printers for the screenprint imagesetter printing process.

Positivity - specialists in screenprint imagesetter technology