[Alt-photo] Re: Stochastic screening in Gum

Charles Berger fotocmb at gmail.com
Sat Dec 7 00:59:35 UTC 2013

Stochastic screens as fine as 11 microns have been used (successfully) for
tricolor carbon.  The problem with stochastic screens are the "artifacts"
often created if less than perfect contact (a vacuum frame is necessary) is


On Fri, Dec 6, 2013 at 3:21 PM, Peter Friedrichsen <
pfriedrichsen at sympatico.ca> 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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