[pure-silver] Re: Rodinal
- From: Gerald Koch <gerald.koch@xxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Mon, 28 Feb 2011 11:06:12 -0800 (PST)
You don't don't need to convert to the hydrochloride salt. It is often
mentioned as a starting point because it is more stable than the free base.
Agfa used the free base when they made Rodinal. There is a very long thread on
makeing Rodinal on APUG. The relation between the weights can be obtained from
the following equation.
PAP base + HCl --> PAP.HCl
MW 109 36.5 145.5
Jerry
________________________________
From: Thierry ARNAUD <aristark@xxxxxxxxx>
To: pure-silver@xxxxxxxxxxxxx
Sent: Mon, February 28, 2011 3:01:29 AM
Subject: [pure-silver] Re: Rodinal
Hello,
I have 4-aminophenol (paraminophenol) and I would like to mix Rodinal by my own
but I don’t know how much hydrochloric acid I have to add to the 4-aminophenol
to get the paraminophenol hydrochloride.
Does somebody know something about this point?
Thanks in advance.
Best,
Thierry ARNAUD
France
De :pure-silver-bounce@xxxxxxxxxxxxx [mailto:pure-silver-bounce@xxxxxxxxxxxxx]
De la part de richard lahrson
Envoyé : lundi 28 février 2011 04:33
À : pure-silver@xxxxxxxxxxxxx
Objet : [pure-silver] Re: Rodinal
hi it was a cold evening, everything went smooth. rodinal works well with the
slower films like efke 25, 50, and100. these are the same as the old adox
films. rich
On Feb 27, 2011 7:09 PM, "Eric Neilsen Photo" <ej@xxxxxxxxxxxxxxxxxxxxxxxxxx>
wrote:
>
>Did you try using a water bath, to mix your chemicals in? It will carry the
>heat better than your beaker or flask sitting in air. The rodinal from the
>Formulary last a good while.
>
>Eric Neilsen
>Eric Neilsen Photography
>4101 Commerce Street, Suite 9
>Dallas, TX 75226
>
>www.ericneilsenphotography.com
>skype me with ejprinter
>www.ericneilsenphotography.com/forum1
>Let's Talk Photography
>
>-----Original Message-----
>From: pure-silver-bounce@xxxxxxxxxxxxx
>[mailto:pure-silver-bounce@xxxxxxxx
>Sent: Sunday, February 27, 2011 2:48 PM
>To: pure-silver@xxxxxxxxxxxxx
>Subject: [pure-silver] Rodinal
>
>Hi,
>I just mixed up a liter of Rodinal type developer from Photograp...
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