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Printing c m y k
Hi all,
Why is it when you want to print full yellow, cyan or magenta the rip software prints something different?
I never seem to get 100% yellow, cyan or magenta. I was printing a logo today for my local printers, there logo is made up of four letters, each one in turn being the c m y and k. I use Wasatch 6.3 is there away to get it to print 100% yellow as 100% yellow, or any of the others. While not printing other colous with it. Say I want to print a block of process yellow, the rip wont print just yellow, it will print something else. Can be a bit annoying at times.
Thank you for taking time to read my post and hope someone let me know what the problem is.
From Mark
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18 Replies
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what type of file are you printing from?
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vector. i dont have any problems with bitmap images
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what rip are you using?
Peter -
wasatch 6.3. activasol inks, grenadier
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i know what u mean… ur RIP basically forces the CMYK numbers to shift to the device profile, its only slight but if your dots are big, then it shows.
We dont suffer from the problem but if I want to really get a solid head colour, i have to put the JV3 in service mode and print the heads that is testing the head by squirting one at a time, i know i am not going to do it perfectly with a file. You might some diferent results by printing with Photoshop and a TIF file in CMYK, if you have it.
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Even though you set it in your signmaking programme for 100% of a colour
say black etc, when you send it to the rip it will change it to what it thinks black should look like according to your profile settings. You can turn this off.
I used to use Wasatch but now use Versaworks and in there its "use density control only". I cant think were it is in Wasatch but its called "Replace spot colour" and you can set this permanantly so whenever that colour is used in the design it will ignore the other settings and print pure colour. I am sure someone on here will show you how to do this. -
hm.. thats a thought… could always name the colours to Pantone Cyan? is that possible? dont know
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Its definitely called replace spot colour and your telling the rip to ignore the colour settings and print pure cyan or whatever. We used to do this when we used wasatch with our Cadet and changed black & yellow to print that colour only all the time and it worked perfect. So you can certainly change it permanantly. We now have a Versacamm and we do it in Versaworks the same.
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does anyone else think the wasatch rip is unnecessarily clumsy and awkward to use or is it just me?
apologies for the slight hi-jack
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most common reason for this is there is a profile acting on the file before wasatch gets it.
if you are exporting via eps and you send 100% yellow make sure the apply ICC profile is OFF.chris
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only played with wassatch a small amount of time and thought it was not great.
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We used Wasatch 5.1 and its simple to change. I just can’t remember how.
Somewhere in the settings is an option to replace the colour with 100% of that colour only. -
When exporting from Corel as an eps file for the printer, make sure to check the "send bitmaps as rgb" box. If "send bitmap as cmyk" is selected, the colours wil not be the same. The reason you dont have problems with bitmaps is propably because they are RGB bitmaps.
Or you could convert your vector file to a (rgb) bitmap before sending?
I mistakenly believed the files should be send as CMYK since the printer is CMYK ( Roland in my case). I now export all as RGB.
Try printing a coulour chart, sending it as an rgb and cmyk to see the difference.
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None of these things will make any difference. The answer is in the rip.
No matter how you send it to the rip and from what programme, the rip will alter it to the way it sees correct, this is what colour correction is all about and why we have different profiles. You have to tell the rip to ignore any colour correction so it only fires from that head and will not mix any other colours with it ! The reason its Ok with bitmaps is that there are probably no pure colours. But with vectors you are setting the colour in your design programme. Please believe me this can be easily altered. -
Just found this on a search from Simon Johnson.
Yes, it’s easy to sort. Open your job in ColoRIP as normal, hover the mouse over any "black" area, right click and then select the "replace spot colours" option. this will open a dialogue box which will show you your current source colour (C0 M0 Y0 K255). Obviously this suggests it is already correct so what do you do? Above these numbers is a little radio button called "device bypass" check this and then OK your way out. As mentioned elsewhere, when prompted, change the name of your profile by adding some reference to pure black on the end of the original name.
Don’t panic if your displayed image no longer shows black but instead shows red stripes on everything that should be black. This is correct, it is just warning you that this colour is no longer being corrected – it will indeed print with just the black ink.
If your numbers are different from those above, you either did not select a pure black in Corel or you have colour management turned on in Corel and it is changing the values when you export the image as an EPS file.
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If I’m sending a job from coral to Shiraz I send most vector and bitmap combined jobs as pdf’s. You must make sure the vector colours are taken from the cmyk pallet. Or if you click on the colour block at the right hand bottom side of the screen the Uniform fill window opens. Select the Pallet option. This I’ve found gives a broader selection with more accuracy.
If it’s just a bitmap job photoshop would be the choice for more accurate colours. -
i sometimes find PDF is a good route on standard Corel settings, if EPS then I noticed slight differences, but not affecting vector if memory serves me correctly.
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Hi, don’t know if you’ve solved your problem yet
Colour replacement is probably what you need. I’m not sure on Wasatch if you have this facility. If i have a tricky colour i export it to my rip and click on the colour replacement tab. This brings in the input colour that you exported as. I then can then alter the CMYK and test print a few times until i get the desired colour. At that point name the replacement setting ie. magenta, pantone, etc. So next time you bring in a file with the same properties you can simply select the preset and it will print the colour you need everytime
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