[Alt-photo] Re: DAS from China

[Kees Brandenburg]

Hi Jorj,

Nice to hear you like the Chinese DAS. I told you ordering is a bit adventurous...but it's worth the hassle.

Can you also tell us how you print your carbon negatives? With a color layer as in your casein negs?

kees



On 1 jun. 2013, at 00:19, Jorj Bauer <jorj at jorj.org> wrote:

> Just to follow up to everyone: the DAS from China is great. I'm using a 3% (w/v) solution, 1:1 with acetone, brushed on (because I have existing sheets of carbon) and it works fundamentally the same as a 1.5% of Ammonium Dichromate, 1:1 with acetone, brushed on the same, dried the same, same exposure time.
> 
> The ChartThrob curves are very similar. Both are nearly linear, with DAS being closer to linear response. Which makes it easier to use stock negatives without diddling with curves; I'll probably never use this curve.
> 
> The two curves are here for anyone that's interested:
> 
>    http://www.jorj.org/expire/jorj_carbon_das_6m.acv
> 
>    http://www.jorj.org/expire/jorj_carbon_6m.acv
> 
> -- Jorj
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