U of S | Mailing List Archive | alt-photo-process-l | One year old DS-2 not dead, DS-5

One year old DS-2 not dead, DS-5

I wuld like to see your developer DS-5, which you said on your web site is now obsolete since TechPan is dissapeared from the market. I have quite a few EFKE Ortho film to develop. It's quite contrasty and I must low down the contrast.
I think others will be interested too.

Last month I tried your DS-2 developer, which I mixed ONE! year ago. 2x concentrate prepared with distilled water was stored in small 100 ml glass bottles filled to the brim. On my surprise developer after one year was not dead, but it was not as potent as already prepared. With prolonging the development time for 50 % the Ilford PAN 100 and EFKE KB100 looks pretty normal except grain is a little bigger.
So I think it is not true that this developer dies very quickly. I routinely use it one month old and is as good as new.

Regards from sunny Slovenia
Stane Kocar

----- Original Message ----- From: "Ryuji Suzuki" <rs@silvergrain.org>
To: <alt-photo-process-l@usask.ca>
Sent: Wednesday, August 08, 2007 7:32 AM
Subject: Re: Xray Film and Pyrocat

Many X-ray films are inherently high contrast, because many
specimens for X-ray imaging give low contrast. However, x-ray
films vary a lot, in terms of the type of radiation to which
they are optimized, speed, contrast, etc. so you might want to
look for suitable film (if possible).

I could repeat general guidelines like reduced time, increased
dilution, etc., but trying to reduce film contrast this way
beyond what the emulsion was designed for very often results
in the cost of poor Dmax, lower speed, strange tonality, etc.

Ryuji Suzuki

From: Sandy King <sanking@clemson.edu>
Subject: Re: Xrya Film and Pyrocat
Date: Tue, 07 Aug 2007 21:59:54 -0400


In my previous message I absolutely ignored the fact that you
mentioned you were working with x-ray film . For that reason my
comments at the end of the message are completely gratuitous.

Sandy King

At 5:55 PM -0700 8/7/07, dan jones wrote:
>I have been experimenting with xray film in various developers, and
> have had some success using pyro hd (1+1+100/8 minutes/rotary dev). > The
> results are still a little too contrasty...is there a way to decrease
> contrast with longer/shorter developing times or different dilutions? > The
> final destination is POP and VDB prints.

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