[rollei_list] Re: Rolleiflex 2.8C and two developers
- From: Robert Meier <robertmeier@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Thu, 30 Jan 2014 08:32:34 -0600 (CST)
People use T-Max undiluted?? 3:1 was what I remember.
On Jan 29, 2014, at 11:46 PM, Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
>
> ----- Original Message ----- From: "CarlosMFreaza" <cmfreaza@xxxxxxxxx>
> To: <rollei_list@xxxxxxxxxxxxx>
> Sent: Wednesday, January 29, 2014 7:09 PM
> Subject: [rollei_list] Re: Rolleiflex 2.8C and two developers
>
>
>> My T- Max RS developer bottle describes the following components for
>> the Part A (the big bottle):
>
>> (63149-47-3); Hydroquinone (123-31-9); Sodium biosulfite (7631- 90-5);
>> 4-Hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidinone (13047-13-7).
>> The components for the Part B (the little bottle) are: Dyethilene
>> glycol (111-46-6); Acetic Acid (64-19-7);
>> 1,4-diphenyl-3-(phenylamino)-1H-1,2,4 triazolium hydroxide
>> (2218-94-2). The weight or proportion for each component is not
>> mentioned.
>> The plain T-Max developer has been discontinued according the B&H NYC
>> web site. Some commercial labs still developing B&W film use the T-Max
>> RS developer due to its replenisher system, perhaps it's the reason
>> Kodak chose this developer to continue the production; the plain T-Max
>> is a similar developer in spite of some differences and there was no
>> place for both developers in the current film market.
>>
>> Carlos
>>
> Now, I am not a chemist but have some idea of what this stuff is.
> 4-Hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidinone us Kodak Dimezone, their
> version of
> Phenidone.
> Diethanolamine-sulfur dioxide complex I think this takes the place of sodium
> sulfite in liquid concentrates. Its also found in Kodak HC-110 and Technidol.
> I am not sure about Part B but think one of these compounds is the silver
> sequestering agent used to prevent dichroic fog.
> Looking these up on Google gets a lot of hits back to the Kodak MSDS, not
> helpful.
> FWIW, Xtol evidently is now quite reliable. The first step Kodak took was
> replacing their metalized paper envelopes with plastic ones that did not
> spring microleaks. You will find that nearly any old Kodak chemical packaged
> in those yellow paper envelopes has oxidized. Once upon a time they used
> sealed cans and that stuff lasted for decades.
> I am pretty sure Ilford makes almost exact equivalents to T-Max RS and
> perhaps Xtol. They certainly do for the late, lamented Microdol-X, Perceptol
> is, if not identical, pretty close to it.
> The main virtue of Xtol is that is environmentally friendly since it
> contains no Metol or hydroquinone.
> I am sure you are all aware that T-Max of either sort can be diluted. The
> development times for many films are too short with the full strength stuff.
> I don't know if it has any effect on grain. I found that T-Max RS was
> somewhere midway between D-76 and Rodinal in grain.
>
>
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> dickburk@xxxxxxxxxxxxx
>
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