[pure-silver] Re: What happens when XTOL dies
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Tue, 28 Feb 2006 16:56:37 -0500
Some years ago the following formula appeared in several publications and was
said to produce results similar to Microphen. The formula is a bit different
than ID-68.
Distilled water (50°C) ................. 750 ml
Sodium sulfite (anhy) .................. 100 g
Hydroquinone ........................... 5.0 g
Borax (deca) ........................... 3.0 g
Boric acid ............................. 3.5 g
Phenidone .............................. 0.2 g
Potassium bromide ...................... 1.0 g
Distilled water to make ................ 1.0 l
The following formula appears in patent application 5,210,010 and is probably
similar to Iltotec DD-X
Potassium sulfite, 60%wv ............... 548 ml
Water................................... 380 ml
Diethylene glycol ...................... 45 ml
Hydroquinone ........................... 44.0 g
Phenidone-B ............................ 1.2 g
DAPTA .................................. 4.8 g
Borax .................................. 23.5 g
Jerry
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Richard Knoppow
Sent: Tuesday, February 28, 2006 3:22 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: What happens when XTOL dies
----- Original Message -----
From: "Justin F. Knotzke" <jknotzke@xxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, February 28, 2006 6:03 AM
Subject: [pure-silver] Re: What happens when XTOL dies
> Richard Knoppow wrote:
>
>> The Ilford published formula ID-68 is essentially the
>> same as Microphen.
>
> Richard, not questioning your authority on this, but
> just out of
> curiosity, how does one know that ID-68 (out of the
> Darkroom Cookbook I
> assume?) is really DD-X or Microphen?
>
> J
>
I got a note in personal e-mail from Ryuji Suzuki stating
that they are not the same and taking me to task for saying
they were. I intend to continue my correspondence with
Ryuji with hopes of getting some specific detail about this.
From his short note he considers them to be quite different.
I really intended to say only that they are similar in
application and performance, and that if one were not
available one of the others would probably be satisfactory.
If ti turns out that they are really very different I will
be willing to retract my statement.
My conclusions were based on a comparison of the
Microphen MSDS with the published formula for ID-68. The
exact proportions of the ingredients can not be told from
the MSDS but its possible to get some idea. From this
comparison it appears that ID-68 and Microphen are similar.
DDX is a liquid concentrate so its formula is quite
different. All three of these, and Kodak T-Max, yeild about
sligtly higher speed, and slightly coarser grain than D-76.
My source for the ID-68 formula is _The Photo Lab Index_
c.1972 The MSDS for Ilford products is available from the
Ilford web site or from http://www.hazard.com The ones from
the Ilford site are newer. Kodak MSDS are available from the
Kodak site http://www.kodak.com with a little searching
around. They are also available from the Hazard com site and
again, the Kodak ones are newer.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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