Registration black

[Woodpig]

Hi,

I'm putting a barcode on the back of a book cover, and I need it to be registration black (CMYK - 0% CMY, 100% K!). Is it enough to add an adjustment layer (Black and white adjustment) and set all the vales to maximum negative (-200%)? Or is there a better way?

THanks!

Gareth.

[loukash]

4 hours ago, Woodpig said:

to add an adjustment layer

An adjustment layer will rasterize anything below.
I definitely wouldn't ever want that happen to a barcode.

[lacerto]

Obsolete.

[Woodpig]

54 minutes ago, lacerto said:

Please double-check this. Registration black means 100% each of the four process colors (and is available as a special color also within Affinity apps). Barcodes however are typically printed in K100 (and CMY 0) to avoid misaligned process colors and best possible reading.

Thanks. Yes, I've checked with the publisher, and you're right. It's not registration black, it's K100, CMY 0.  So what's the best way of achieving that? Via an adjustment layer?

[walt.farrell]

37 minutes ago, Woodpig said:

So what's the best way of achieving that? Via an adjustment layer?

You said you're adding a barcode. What kind of file is the barcode that you're adding?

[Woodpig]

3 minutes ago, walt.farrell said:

You said you're adding a barcode. What kind of file is the barcode that you're adding?

It's a PDF, so a mixture of fonts and raster images. The barcode is a raster image.

[lacerto]

Obsolete.

[Woodpig]

25 minutes ago, lacerto said:

If your document is in CMYK mode, and your barcode is an RGB, grayscale, indexed or monochrome image, you can apply it "K-Only" button available on the context toolbar to make the image be treated like K-only image when exported to PDF.

This is very useful - thank you! However, I can't see a "k-only" button - where would that be? I'm using Affinity Photo.

[lacerto]

Obsolete.

 

[lacerto]

Obsolete.

[lacerto]

Obsolete.

[Woodpig]

Thanks very much, Lacerto. That's extremely useful. I'll digest your advice and get back if there are any issues.

Best wishes,

Gareth.