Re: tonal inversion and pigment loads

From: Katharine Thayer ^lt;kthayer@pacifier.com>
Date: 01/26/06-08:21:59 PM Z
Message-id: <26D79D2C-EA1B-47E3-AE27-1A19F9BD80FF@pacifier.com>

I thought that Joe and Tom or somebody had already ruled out heat as
a cause of this, in the last go-round.
kt

On Jan 26, 2006, at 5:55 PM, Ender100@aol.com wrote:

> ;)
>
> In a message dated 1/26/06 2:25:15 PM, gauvreau-yves@sympatico.ca
> writes:
>
>
>> here is an idea, I think it is well known that heat by itself
>> causes some
>> cross-linking to happen and say under a step tablet where the
>> density is
>> high enough, exposure alone doesn't reach the gum but heat does.
>> It could be
>> that heat doesn't transform the gum dichromate in the same way as
>> does
>> exposed gum, in other word the two phenomenon don't "create" the
>> same type
>> of molecule and the cross linking of one may have different
>> properties then
>> the other or something like that.
>
>
>
>
>
>
> Mark I. Nelson
> www.MarkINelsonPhoto.com
> www.PrecisionDigitalNegatives.com
> PDNPrint Forum @ Yahoo Groups
Received on Thu Jan 26 20:22:24 2006

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