[Alt-photo] Re: Stochastic screening in Gum

[Mary Donato]

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):
http://www.flickr.com/photos/gneissgirl/5614283695/in/photostream/
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.

md

/~~~~~~~~
www.alternative-ego.com/


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
>
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