[pure-silver] Re: Avoiding pinholes on lith
- From: "J. Stewart" <jrstewart@xxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 11 Oct 2004 09:11:30 -0400
Peter, thanks.
I did try lith developer 1+1 and still got pinholes. This developer has HQ
and sulfite in Part A and carbonate and hydroxide in Part B (Arista Lith
Developer, I think).
I have D76/ID 11... it uses borax instead of carbonate. It contains both
metol and HQ... most lith developers have only HQ. I'd like to mix up
something quickly as I have to mail-order all my chemistry and don't want to
wait.
I wonder if I could make up a developer with a "lith" concentration of HQ
but use Borax and sulfite concentrations of D76. Any thoughts on this
approach?
I searched thru Photo Lab Index but didn't find anything that would help.
Jim
----- Original Message -----
From: "Peter De Smidt" <pdesmidt@xxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Sunday, October 10, 2004 10:10 PM
Subject: [pure-silver] Re: Avoiding pinholes on lith
> J. Stewart wrote:
>
>>I've tried everything I know to avoid pinholes on lith. I'm developing in
>>different developers (paper developers as well as lith developers) at
>>fairly concentrated levels (1+1 or full strength). I'm not using acid
>>stop (I let them rinse in plain water), and I'm using alkaline fix. I let
>>the lith film sit emulsion side up in the developer tray and am very
>>careful when agitating the file-- sometimes merely rocking the tray. I
>>wash the films vertically in a flow-thru washer. I'm using Arista Lith
>>4x5.
>>I get sometimes hundreds of very tiny specks on the densest parts of the
>>film (where they are most obvious). None are over the size of a pinhead.
>>The number of specks is highly variable, suggesting it's not due to a
>>manufacturing defect.. or maybe it is).
>>
>>Is there something about using lith that others can share to help me solve
>>this problem?
>>
>>Jim
>>
>>
>>
>>
> You might try a less alkaline developer. Paper developers often use
> carbonate, and lith developers often use sodium hydroxide, as
> accelerators. You might try a developer with a lower ph, such as one
> produced with sodium metaborate or borax. If I remember correctly, Uncle
> Dick had a problem with pinholes with xray film. He switched to a less
> alkaline developer, which greatly reduced the problem. Hopefully, U.D.
> can confirm.
>
> -Peter De Smidt
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