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1. 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.

   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… more

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   Need More Info  ·  AdminRama (Mgr, Software Quality Engineering, Adobe Illustrator) responded

   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