CC 2018 Multiply Blend Mode Incorrect
CC 2018 & Mac Sierra
If you apply multiply blend mode to a path, group that and apply multiply again at the group level, you now get 2x multiply. This is wrong whether you look at this from a process ink or spot color printing.
Omg the uploaded example, I am expecting both left and right sides to be identical to each other, as in versions prior to CC2018.
We often get files from designers who will try to make a color look good on screen, and printing off a color laser printer. You could for example draw 2 overlapping shapes with PMS 123 on multiply them to make a new color. This in my opinion has always been wrong. In reality on press no-one runs a double hit, except for on occasion a white double hit on flexo. Nowadays the substrate and inks are better than you very rarely even see a double hit on white.
Anonymous
shared this idea
We could reproduce this issue at our end, following are the findings
1. This issue is reproducible in CPU, GPU Rendering and Print Preview(thumbnail).
2. Reproducible in older versions as well including Illustrator CS6 (not a new break in CC 2018)
3. Works fine in Overprint Preview
4. Works fine in Print & PDF
Please confirm above observation match with the problem reported in this issue
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Shawn Anderson
commented
This issue is still there in CC 2020 and and does affect PDF export for output. It looks like it also happens when you combine overprint on a fill and multiply.
When a spot color is put on top of an image and set to overprint or multiply over a CMYK image, the top spot color element should have no effect on the item underneath. If you stick to a single setting (one multiply or one overprint) it's fine but if you combine both or put two multiply effects in place the background image prints much darker.
See attached file. The top three examples are incorrect the bottom two are how it should work in all situations.
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Anonymous
commented
Same issue here. Blending mode does not work in Ai CC 2019. Please fix!
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Anonymous
commented
Blending modes, in my case I am using mostly screen & color burn, not working in print or in workspace preview in ai, including Overprint (graphic with BM applied disappears (screen) or partial blackness shows (color burn)). What happened? Fixing this asap?!?! What's the timeline on this fix???
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Dan
commented
-Blending modes not working- Turning to black
Blending modes are not working properly. I've notice that mostly AMD's users having this issue. To my understanding it is because AMD is working properly with the latest CC 2018 update. If someone has a solution to this please help.
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Monica
commented
Hey, also experience all the problems with blending modes! My files wont read or update any blending modes- even drop shadows. Multiply just shows as being black. The only blending that works is color and hue.... everything else is black. Even masking shows as black! Please help!
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Mike Gondek
commented
1. Yes
2. Yes this does happen in previous versions also, my apologies as I initially thought this was a new issue in 2018 as my team reported to me and I did not test in prior versions.
3. No. In overprint preview the colors are still different between both examples in my sample file.
4. No. When your print of make a pdf the colors are darker on the example on the right.For process printing is debatable for if blend modes to accumulate. For spot definitely the bend modes should not accunalate as this is not reproducible in the printing separation process. So what you see on the screen, or a color laser print is not accurate to the results you will get when this goes to final print separations.
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Anonymous
commented
1. Yes
2. Yes this does happen in previous versions also, my apologies as I initially thought this was a new issue in 2018 as my team reported to me and I did not test in prior versions.
3. No. In overprint preview the colors are still different between both examples in my sample file.
4. No. When your print of make a pdf the colors are darker on the example on the right.For process printing is debatable for if blend modes to accumulate. For spot definitely the bend modes should not accunalate as this is not reproducible in the printing separation process. So what you see on the screen, or a color laser print is not accurate to the results you will get when this goes to final print separations.
