Re: Another Ziatype question

Hi Clay,

----- Original Message -----
From: "Clay" <wcharmon@wt.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, October 13, 2004 6:31 PM
Subject: Re: Another Ziatype question

> >
>> Should I rinse the paper in plain water after treating in oxalic acid or
>> just hang it to dry?
>
> I just pass the paper through a tray filled with the oxalic acid solution
> and then hang it to dry over my sink - to catch the drips.

Thanks, that's what I thought (because there's no sense in rinsing the paper
in iron rich alkali tap water after oxalic acid treatment) but wanted to
confirm anyway.

>> This is indeed a very important point. I can see no distinction between
>> steps 1 and 2 in reflected light but can see the difference in the light
>> table. Should I continue to expose even if the the tone distinction
>> between 1 and 2 is not evident in reflected light - to the point that I
>> can see no difference in the light table?
>
> Unless you plan on viewing the print with back light, I would just use the
> reflected light as your guide.

Ok, then I can confidently say that my standard printing time is adequate.

>> Well, probably I made this very mistake; I coated 22cm x 17cm area with
>> a damp synthetic brush using just 1ml coating solution! I currently have
>> only 25ml of LiPdCl solution (purchased to try/test - will order more
>> asap) that's why I try to be conservative (more than the expense, it's
>> the time that I have to wait for the package to arrive that makes me
>> nervous)...
>
> I normally use about 1.6-1.8ml total solution for a print this size. Rough
> rule of thumb is 0.2ml/10square inches (metric: 43ml/square meter) with
> the
> Magic Brush. More if you are using a hake brush.

Ok, will try with oxalic acid treated paper using more coating solution.
Will return with my latest test results (and hopefully a successful print
too).

Thank you very much for your help!

Regards,
Loris.
Received on Wed Oct 13 14:46:38 2004