Archived posting to the Leica Users Group, 2000/05/02

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Subject: RE: [Leica] Re: Anyone use Xtol Developer?
From: "Jean-Claude Berger" <>
Date: Tue, 2 May 2000 23:03:49 +0200

Hello Byron,

The dev times given by Kodak are complexly wrong for me, like for you it seems.
As an example, here are the factors I use for different films (at 24 deg C):

Delta 100: 1.24
Delta 400: 1.06
HP5: 0.99
Tmax 100: 1.74 (this is consistent with your discovers)
Tmax 400: 1.83 (!)
Tri-X: 1.01 (well, on lazy days, I round it to 1 ;-) )

Anyway, I find Delta sharper and having a better tonality than Tmax.

All the best,

- --
Jean-Claude Berger (
Systems and RDBMS consultant (MCSE)
Lyon, France

> My rule of thumb for Xtol and Tmax emulsions
> is to take the recommended time and increase it by 50%.
>  ...
> I get very consistent development with Xtol and Ilford Delta 100/400 with
> the recommended times,
> Byron.