Re: Epson x900 & GMG issues
Re: Epson x900 & GMG issues
- Subject: Re: Epson x900 & GMG issues
- From: Thomas Holm <email@hidden>
- Date: Thu, 21 Jun 2012 16:52:58 +0200
Martin
I just tried this on GMG (CP5.3) on a 9900, 8c 720x720, simulating ISO coated v2 (default GMG profile) on GMG semimatte 250 paper and other than the default noise from the MX4 it's perfectly even.
I did have initial banding, but this was because of a clogged yellow printhead, after cleaning it works as expected.
I might be a good idea to check printhead allignment in the printer menu and paper advance calibration under advanced printer options in Colorproof. GMG has a downloadable testfile for paper advance calibration somewhere in the support section.
Best regards
Thomas Holm
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On Thursday den 21. June 2012 at 13.53, Martin Orpen wrote:
> If anybody on the list is using a GMG RIP to drive a 7900 or 9900, I'd like feedback on a quick test please:
>
>
> 1. Make a CMYK image in Photoshop that covers the width of whatever paper you're using and about 8-10 inches deep.
>
> 2. Fill the image with 100 cyan and 80 yellow.
>
> 3. Dump the image on the RIP and proof it on GMG Semimatte or Gloss using 8 colour mode and 720x720 resolution, bidirectional preferred, but doesn't really matter. It also doesn't matter if you've calibrated this setup or if you are running to SWOP or FOGRA39L or to a Custom Linear MX.
>
> Note that this is a test of 8 colour mode -- not the usual 10 colour mode that the x900 machines use.
>
> We cannot get this green (100c 80y) to print without both horizontal and vertical banding. The banding is gentle and looks like the green is moving from cyan to yellow -- more like moiré than mechanical issues you'd get with a head problem.
>
> In 10 colour mode our 9900 prints fine -- but that may be because the cyan and yellow ink combination is replaced with mostly pure green.
>
> I need to work out if this is a mechanical problem with a 6 month old 9900 or an issue with screening or inks?
>
> It'd also be interesting to know if anybody else notices a rather strange effect caused by the vinyl strips in the print catcher -- if you leave that green print face down on the strips for 5 or 10 minutes you'll see that the inks that were in contact with them have gone dark and need a few minutes to recover their expected colour. Never seen that happening in 10 colour or with other colour combinations...
>
> Appreciate it if anybody can help with this one and I'm more than happy to reciprocate if any other GMG/Epson users want tests run.
>
> --
> Martin Orpen
> Idea Digital Imaging Ltd
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