RE: Another Ziatype question

Hi Clay, thanks for the answer.

> -----Original Message-----
> From: wcharmon@wt.net [mailto:wcharmon@wt.net]
> Sent: Tuesday, October 12, 2004 3:04 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: RE: Another Ziatype question
>
>
>
> Loris:
>
> In my experience, Whatman's is an excellent paper for both
> DOP and POP pt/pdf
> printing. I do think a brief treatment in 1-2% oxalic acid is
> beneficial. I
> can easily get rich black - Dmax in the 1.4 - 1.5 range -
> with this paper.

Should I rinse the paper in plain water after treating in oxalic acid or
just hang it to dry?

> Don suggested making sure you are getting adequate exposure.
> I think that is
> an excellent idea. Inadequate exposure can be a sneaky
> problem because if you
> print like me, you sometimes can concentrate on getting the
> highlight density
> right to the detriment of thinking much about the shadow densities.

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?

> Another suggestion is to make sure you are using enough
> sensitizer solution
> to effectively coat the paper. This is the most common

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)...

> ...
> Getting all fussy
> about the solution's strength is a lot less important than
> making sure you
> have enough FO/metal in a given surface area to give you a
> good print.

Ok, will try with 50% or 100% more coating solution (1.5ml per 22cm x
17xm) and follow up.

Thanks for valuable help.
Regards,
Loris.
Received on Wed Oct 13 05:23:54 2004