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One color printing press problem !


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I could be misunderstanding what you mean by single-color but if you mean greyscale, choose either Gray/8 or Gray/16 for the new Document > Color Format choice, not CMYK/8. (CMYK is not a single color format.)

All 3 1.10.8, & all 3 V2.4.1 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7
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1.10.8; Affinity Designer 1.108; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7

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I think the OP is looking for spot colour support.

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No, he is simply looking for something very common: If you define a CMYK color C=0, M=0, Y=0 and K=100, it should be passed over to the print PDF and Acrobat as exactly(!) these colors and not change the values of each color plane, when color profiles and the simulation profile of Acrobat are correct.

Composing Black out of all CMYK color only should happen, if you intend it or if you have a RGB/CMYK to CMYK conversion.

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I tried to reproduce, what the original poster wanted to do.

If you make it right, Affinity seems to perform absolutely correct.

Of course you have to choose equal profiles in document setup and PDF-output, and you have to choose the same simulation profile within Acrobat to inspect it.

I attached:

• a sample AD-document (ECI ISO coated v2)

• the corresponding PDF output  (ECI ISO coated v2)

• screenshot of document settings (in German language)

• screenshot of Acrobat’s "Output Preview" (in German language)

post-1030-0-03468200-1463223671_thumb.jpg

post-1030-0-12834900-1463223673_thumb.jpg

Sample.zip

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Thank you very much.

 

I tried to reproduce, what the original poster wanted to do.

If you make it right, Affinity seems to perform absolutely correct.

Of course you have to choose equal profiles in document setup and PDF-output, and you have to choose the same simulation profile within Acrobat to inspect it.

I attached:

• a sample AD-document (ECI ISO coated v2)

• the corresponding PDF output  (ECI ISO coated v2)

• screenshot of document settings (in German language)

• screenshot of Acrobat’s "Output Preview" (in German language)

 

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