Re: Tri-colour gum

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Smieglitz@aol.com
Date: 09/17/01-07:48:03 PM Z


David,

You bring up several questions that simply can't be answered with a "one size
fits all" response. I will comment that a good negative for producing a full
scale gumprint generally has low contrast, much lower than a standard
negative for platinum printing or even silver gelatin. You can however
produce gumprints from high contrast kodalith negatives if you wish a
posterized effect. So, it all depends what you are after.

 You mention in-camera separation negatives and pigments for printing each of
the 3 negatives. It sounds like you are not color-separating here, but
rather separating for different tonal areas. If so, is your intent to
neutralize the colors and produce an essentially monochrome image with
slightly warmer/cooler shadows or highlights, or are you after a more
realistic full-color rendition? The latter involves an RGB or CMYK set of
separation negatives and not a set based on tone. Either way
In a message dated 09/17/2001 15:05:36, nashcom@btinternet.com wrote:

<<Hi

I've just watched Livick's movie on gum printing - I bought it a number of

months ago with an order of chemicals from B&S, and have only just watched

it. I've seen some not all that complimentary remarks over the last few

weeks, but it's given me the incentive to try gum printing. Until now I've

only done platinum, and I'm looking for a few pointers.

Ever willing to jump in at the deep end, I'd like to have a bash at

tri-colour printing. Firstly, I'll probably make in-camera separation negs.

What filter values will I need to use, and what pigments are a good starting

point?

I'm also wondering about negative contrast and density. Will a typical

platinum neg be too contrasty? Until now, I've developed in pyro, but I

assume the green stain will influence the colours. I'll probably try a

standard developer, but would like an idea of what contrast range to aim

for.

Also, will I need to make more than three print exposures? I've read

something about developing with yellow pigment for the highlights, then cyan

for midtones, magenta for shadow (I may have got these in the wrong order).

As ever, any help will be much appreciated, and apologies for any dumb

questions. I've never seen a gum print, but I hadn't seen a platinum print

before I made one, so I'm happy to give it a bash.

David Nash>>


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