Re: Getting back into Cyanotype (classic formula)

On Sunday 12 February 2006 06:46, Michael Koch-Schulte wrote:

micheal,

Sorry for that question - i've never use double coat in cyanotype- when are
writing about double-coating do You mean about two differnt layers just like
in gum bichromate or the first coat , drying , the second coat, exposure and
one development ?
What could be achived by the double-coat ? The wider tone scale only ?

regrards,
Paul
> ----- Original Message -----
> From: "Christina Z. Anderson" <zphoto@montana.net>
> To: <alt-photo-process-l@sask.usask.ca>
> Sent: Friday, February 10, 2006 2:31 PM
> Subject: Re: Getting back into Cyanotype (classic formula)
>
> > it works fine, Mac. weigh it and make a 20% solution, 20g to 100ml. I
>
> use
>
> > 8% pot ferri, but Sam Wang I think uses 10%. I also use it 2A:1B.
>
> Christina,
>
> Why do a 2:1 of part "A" to "B" why not just increase the weight by volume
> of part "A" or decrease the saturation of part "B". By going 2:1 aren't you
> in effect just diluting part "B"? Q: Are you double coating this mixture?
>
> ~m
Received on Mon Feb 13 08:15:02 2006