[alt-photo] Re: Dichromated Gelatin Formula

[Francesco Fragomeni]

Thanks but I'm wondering more along the lines of how much Potassium
Dichromate to use for this particular process. I find the term dichromated
gelatin used everywhere describing the Woodburytype process but no where
gives a formula for making the dichromated gelatin and where they do, the
Potassium Dichromate is left out.

-Francesco

On Thu, Sep 20, 2012 at 1:55 PM, Kurt Nagy <kakarott76 at hotmail.com> wrote:

> I have used a 3.5% gelatin mix (7g or one packet of Knox in 200ml water).
>  Following that, to get 20% in 200ml you would need 40g of gelatin.
>
> Someone may check my math because I'm horrible at it but it seems right to
> me, if I'm understanding your question right.
>
>
>
> On Sep 20, 2012, at 3:31 PM, Francesco Fragomeni <fdfragomeni at gmail.com>
> wrote:
>
> > Hi all,
> >
> > Does anyone have a formula for mixing a 20% dichromated gelatin using
> Knox
> > 250 Bloom gelatin and Potassium Dichromate? This would be for use in the
> > Woodburytype process. Also, if you have experience with this, how thick
> do
> > you recommend the gelatin layer be for the relief?
> >
> > Thanks,
> > Francesco
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