Re: Back-exposing on plastic (was: Re: Gum transfer

From: Katharine Thayer <kthayer_at_pacifier.com>
Date: Thu, 04 May 2006 10:09:41 -0700
Message-id: <432DB715-08A3-434E-98CD-4AFE1803251B@pacifier.com>

But should probably add, just for clarity, that this is exactly the
kind of emulsion to use as a second coat in a multiple gum print, to
add DMax and shadow depth to a first printing with a less pigmented
emulsion that gives subtle gradation throughout midtones and highlights,
Katharine

On May 4, 2006, at 9:53 AM, Katharine Thayer wrote:

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>> On May 2, 2006, at 12:50 PM, Ender100@aol.com wrote:
>>
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>>>
>>>
>>> What I am not sure I understand is if you are saying that for a
>>> given mix of gum printed with one coat, changing the shape of the
>>> curve will NOT allow you to get whatever tones you want between
>>> the DMax of this given mix (one printing) and paper white?
>>>
>>>
>
> Sorry, I seem to have misread this sentence the first time. I
> thought you were talking about the scale between DMax and DMin.
> What you're saying here, that one should be able to express all the
> values between DMax and *paper white*, shows even less
> understanding of gum than I was supposing. Let's take a pigment
> mix that is so pigmented (much more pigmented than Chris's 3 g/100
> ml gum) that it can print only one or two very dark values,
> regardless of what the negative looks like; the rest of the image
> will be paper white (assuming that the mix isn't so overpigmented
> as to cause pigment stain). It's not so outlandish to imagine this
> kind of pigment mix; I used to print this very high-contrast way
> early in my gum printing career, as do many people before they
> understand that too much pigment gets you too much contrast.
> (Someone here referred to this kind of print as "soot and chalk"
> which is a great description). Surely you don't imagine that by
> changing the curve, you can make this pigment mix print 256 values
> between black and white?
> Katharine
>
Received on 05/04/06-11:09:39 AM Z

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