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I need to use half tones for a screen printing project, everything I read talks about using a certain LPI (lines per inch) setting. However this appears to be a photoshop/RIP software setting and I can’t find anything that correlates to the half tone filter settings on the affinity photo filter.

Can anyone help with these settings?

ideally looking for 35LPI, 45LPI, 55LPI

 

thanks

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Preparing images for screen printing seems to be full of workarounds in Affinity apps and not at all easy task. Maybe someone could write a comprehensive work flow description (if it is at all possible)?

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I do not think that it is possible without proper print output to PostScript (virtual) printer, something that apps like Photshop, CorelPHOTO-PAINT, and Xara (the cheapest app that I know that supports this) has , and then directing the output to a PostScript file:

Photo: Alvan-Nee-1613959440-unsplash

screening_01.jpg.7068e5f7458ee8d29eb50573b499f519.jpg

screening_03.jpg.16dbde2f1a7cb30be22663169bd90570.jpg

Then you also need an app like GIMP that can open a PostScript file as a monocrome bitmap (instead of rendering it as a continuous tone image):

screening_04.jpg.1d0a7072344132e545d1a91e7d2f4d50.jpg

...so that you get a result that has a precise line per inch density and pattern:

screening_05.png.235f45abb4ccad89a8fdd805ac12cea1.png

screening_06.png.a445b43c68628fdcb5b863bdc9a45842.png

(EDIT: A word of warning related to Xara, though: it does not support true grayscale so the effect above created from a grayscale photo is created by superimposing and multiplying CMYK separations at same angle on top of each other.)

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