[pure-silver] Re: Paraformaldehyde/Acetone in lith developers
- From: BILL WILLIAMS <krbill_10@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Mon, 1 Mar 2010 20:43:53 -0800 (PST)
Same subject more or less, for those interested in lith printing and lith
developers:
I'll prefix this with the statement that I have no chemistry knowledge. Not
even high school chemistry. So I'm not one to be followed blindly. I do read a
lot about anything I throw together before doing so, I'm not totally crazy. I
take precautions, go slowly and carefully. And I dispose of everything properly
when finished with it.
I had purchased some labor partner LP-Lith some 4 or 5 years ago. At the same
time I purchased some FotoSpeed LD-20. I liked the LD-20 better and eventually
I let the B part of the LP-Lith go bad. When I discovered it, I just tossed
the bad B part, and made some home brew B part to go with the A part. The B
part is what contained the hydroquinone. So I mixed up 18 grams of
hydroquinone in 100 ml of propolene glycol along with about a half of a gram of
sodium ascorbate. I use 50 ml of this with 100 ml of the LP-Lith Part A and
WTM 1 litre. It works just fine for lith prints, and last a very long time in
tray or bottle. The A part says it contains 2-5 % 1,4-Dihydroxybenzol and
.5-2 % sodium hydroxide. I haven't looked up the 1,4-Dihdroxybenzol to see
what it is. Maybe by the time I run out of the A part I'll have a homebrew A
part that works well with the homebrew B part.
--- On Mon, 3/1/10, Jean-David Beyer <jeandavid8@xxxxxxxxxxx> wrote:
> From: Jean-David Beyer <jeandavid8@xxxxxxxxxxx>
> Subject: [pure-silver] Re: Paraformaldehyde/Acetone in lith developers
> To: pure-silver@xxxxxxxxxxxxx
> Date: Monday, March 1, 2010, 9:04 PM
> Richard Knoppow wrote:
>
> > I presume the dollar a print
> development cost is for a commerially prepared developer.
> Have you calculated the cost of home mixed stuff? It is
> possible that it could be significantly cheaper. If, as Tim
> Rudman states, acetone CAN be used in a lith developer it
> should help. Acetone is available at any paint or hardware
> store and is very cheap. Probably pure enough for the
> purpose. The developer would probably have to be mixed as
> needed but there may be some way of making up a stock
> solution minus the acetone which would be more convenient.
> > I no longer remember what
> Kodak has/had in their commercial lith developer but I do
> remember that it did not seem to be D-85. There may be yet
> another alternative to formaldehyde or acetone.
> >
> MSDS for Kodalith Super-RT developer. Pretty much the same
> as the regular stuff, I believe.
>
> http://www.google.com/url?sa=t&source=web&ct=res&cd=6&ved=0CCAQFjAF&url=http%3A%2F%2Fwww2.itap.purduhttp://www.google.com/url?sa=t&source=web&ct=res&cd=6&ved=0CCAQFjAF&url=http%3A%2F%2Fwww2.itap.purdue.edu%2Fmsds%2Fdocs%2F9679.pdf&rct=j&q=kodalith+developer&ei=wm6MS7jYA8aPtgfaiv2_Ag&usg=AFQjCNFybcCixP4ZITaqXxoduc8Uo3OpfAe.edu%2Fmsds%2Fdocs%2F9679.pdf&rct=j&q=kodalith+developer&ei=wm6MS7jYA8aPtgfaiv2_Ag&usg=AFQjCNFybcCixP4ZITaqXxoduc8Uo3OpfA
>
>
> -- .~. Jean-David Beyer
> Registered Linux User 85642.
> /V\ PGP-Key: 9A2FC99A
> Registered
> Machine 241939.
> /( )\ Shrewsbury, New Jersey http://counter.li.org
> ^^-^^ 20:55:01 up 40 days, 22:15, 3 users, load average:
> 4.62, 4.57, 4.43
> =============================================================================================================
> To unsubscribe from this list, go to www.freelists.org and
> logon to your account (the same e-mail address and password
> you set-up when you subscribed,) and unsubscribe from
> there.
>
============================================================================================================To
unsubscribe from this list, go to www.freelists.org and logon to your account
(the same e-mail address and password you set-up when you subscribed,) and
unsubscribe from there.
Other related posts:
