Archived posting to the Leica Users Group, 1998/09/06

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Subject: Re: [Leica] Thanks and one more question
From: Dave Richards <>
Date: Sun, 06 Sep 1998 10:56:45 -0600

The tank does not have to be "filled" in order to get consistent,
predictable results.  Enough chemistry to cover the entire reel is
sufficient.  However, it is usually recommended that you put in as many
reels as the tank will hold to keep a single reel from sliding from one end
of the tank to the other.  This isn't a problem with a one-reel tank but
obviously would occur with a single reel in a two reel tank.

On a related note, one thing I have found annoying about some plastic
tank/reel setups is that a two-reel tank (for instance) will hold 17 or 18
ounces of chemistry.  If you mix chemistry in small batches as I do this
means that you can wind up with four or five ounces of developer left; not
enough to develop a single roll.  And since I prefer to mix a fresh batch
of developer rather than combining batches, this small excess is discarded.
 I'm just anal enough so that this offends my sense of neatness and order :)

>if I expect to process only one reel most of the time.  However, as I
>assume the tank has to be filled regardless of whether both reels are,
>does that not meant that you use twice the chemicals in each run?