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Thread: How to print only pure yellow without other colors particles (dithering)

  1. #16
    Junior Member mt99 is on a distinguished road
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    With our Mutoh and Roland printers we use the open for "Pure Hue" in FlexiSIGN when outputting to print 100% yellow or another color to end up with no green tint in the yellows, it usually happens with RGB files upon converting to CMYK you end up with 5% Cyan in the color.

  2. #17
    Banned JPEG2000 is on a distinguished road
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    try to change your embed icc profile in photoshop

  3. #18
    Banned Onino is on a distinguished road
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    I think somethihg else about this microdots which you see under Yellow in the paper.
    It is security dots with information about your printer: Brand, Model, Year,Trader - Customer information in case to work like (illegal printing my, documents etc.).
    So forgot pure yellow.

  4. #19
    Junior Member mtb_ro is on a distinguished road
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    Epson Printer: Under Preferences go to "Advanced Tab" and select ICM. Other printer manufacturers also have this option somewhere in their drivers.

    If You select ICM-OFF and have all color profiles disabled in photoshop then the exact values (CMYK) that you have in your rendered raster image should be sent to the printer "as they are". Y should pe 100% Yellow.

    Consider however that printer ink / tr is very different depending ond make and model so the same CMYK combination will look really different depending on your printer. For this reason you should consider that while disabling ICM will get you your Yellow (and CMK100%), all other colors may be wrong and different from other outputs. For this reason you should look at the other answers regarding RIP software if your printouts also contain other colors that are important.

  5. #20
    Moderator Aaron125 is on a distinguished road
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    Quote Originally Posted by mtb_ro View Post
    Epson Printer: Under Preferences go to "Advanced Tab" and select ICM. Other printer manufacturers also have this option somewhere in their drivers.

    If You select ICM-OFF and have all color profiles disabled in photoshop then the exact values (CMYK) that you have in your rendered raster image should be sent to the printer "as they are". Y should pe 100% Yellow.
    No it won't! There is no possible way to do what you mentid without using a RIP. ALL printers of ANY brand are RGB printers when using the standard Windows drivers. It makes no difference what inkset a printer uses, if printing from Windows without a RIP, every printer is an RGB printer regardless of what is sent to the printer, e.g. your 100% Y or any other CMYK value.

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  7. #21
    Junior Member mtb_ro is on a distinguished road
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    Quote Originally Posted by Aaron125 View Post
    No it won't! There is no possible way to do what you mentid without using a RIP. ALL printers of ANY brand are RGB printers when using the standard Windows drivers. It makes no difference what inkset a printer uses, if printing from Windows without a RIP, every printer is an RGB printer regardless of what is sent to the printer, e.g. your 100% Y or any other CMYK value.
    that is perfectly true and it seems I was wrong. What I'm proposing is a workaround based on simple convertions of CMYK (to RGB) Yellow without using the internal color correction of the Printer. Basicly if the printer gets the order to print C0M0Y100K0 it will simply get it converted to 255 255 0 / FFFF00 if color simulation is off.

    I just double-checked and it seems that it only worked because of the sofware RIP of Corel Draw that had been set to a lucky combination of ICC profiles for the L200 :)

    I just checked my math and it seems that the C0M0Y00K0 value corresponds to R255G248B18 without corrections, meaning that when to printer converts it back to CMYK internally it would actually be C4M0Y99K0 ... thus the grain.

    So the only way to get this is to get a lucky perceptual convesion that matches with an ICC profile so it removes a little Cyan and adds some extra yellow. sorry.

    conclusion: Can't be d without RIP ... and even then only with a designer ICC or a loooot of luck.

  8. #22
    Donor mvmservis is on a distinguished road
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    You can help with adding image to cmyk and use only yellow 100 %

  9. #23
    PRC Member ChristianSTG will become famous soon enough
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    Easy

    Use one image in CMYK mode, and desactive de colormanager en the driver.

    if is epson is easy, if is HP may be some litle more complicated. but not imposible with same way, desactivate the color manager in the driver

  10. #24
    Banned pinktank is on a distinguished road
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    Not all printers support post-script control of ink choice, so you might not be able to do this even with a rip

  11. #25
    Banned kappatre is on a distinguished road
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    Any way to do this under Photoshop/Illustrator CC and OSX?

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  13. #26
    PRC Member johnlongthomas is on a distinguished road
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    for cmyk printing on most Epson printers use printfab. Download free for windows from vendors website

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