[Alt-photo] Re: Stochastic screening in Gum
gneissgirl at cableone.net
Sat Dec 7 03:56:53 UTC 2013
I played around with the color halftone filter in photoshop cs4 a while
back, just for fun, not to solve any problem. I don't remember the
details but I think I just used the default settings that came up in cs4
in terms of screen angles, etc. I think the radius was 8 pixels.
I posted 5 images of my experiments on flickr. Here's a link to one of
them (look at adjacent images for more):
I applied the halftone filter to a color image, then split the channels
and printed 3 layers: cyan, red, and yellow (rooster image).
I also applied the halftone filter to a b/w image and printed "false
color" in 3 layers (gourd image).
Details of what I did are in the comments, but I'm happy to try to
elaborate -- if I can remember - it was >2years ago!
I was surprised at the detail that could be obtained. But 8 pixels is
pretty big, and the idea here was to have the dots be part of the
design, as a graphic element, rather than a way to achieve tonal gradation.
Hope this helps and isn't too far afield from what you're asking, Peter.
On 12/6/13 4:21 PM, Peter Friedrichsen wrote:
> Has anyone applied a stochastic screen to gum printing? This is a half
> tone technique that uses dot frequency to emulate color/greyscale. The
> smaller the dot size, the more photographic the rendition. My UV box
> generates diffuse UV light so I think that may not be as effective as
> a more point sourced arc type UV lamp.
> Has anyone done anything like this before? I was wondering what the
> minimum dot size that could be realized from a contact negative?
> Peter Friedrichsen
> Alt-photo-process-list | altphotolist.org
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