Re: rodinal developer for infrared

[Kayo Matsushita <kayo@xxxxxxxxxxxxx>]

At 19:27 -0400 9/11/96, JoePaduano@xxxxxxx wrote:

>I recently e-mailed to get info. on rodinal  dev. used with infrared. I
>received two replies from two sources, but there is too big a discrepency.
>One person suggested a 1:75 dilution at 70F for 5 min. The other response
>said to use a 1:50 dilution at 68F for 18 min. Does anyone know from
>experience which of these is correct, if either? Thanks.
>                                                joe

I experience the similar feeling when I searched around for the development
information for my first roll of Konica infrared film. It partly depends on
your preference for contrast and look, metering, and also what kind of
enlarger you're using among other things. Rodinal is a very versatile
developer that can yield very high accutance while it could also work as a
compensating developer at high dilution.

I ended up using 1:50 dilution at 68F for 6 min. based on the
recommendation from George L. Smith (although I think he uses 6.5 min).
This was because I didn't want excessive contrast and also because I
normally print with a condenser type enlarger which calls for lower
contrast negative than diffuser type enlarger. And I'm quite happy with the
result I've been getting. One of the negs I developed this way printed
quite nicely on Grade 2 Portriga. I haven't tried other times and
dilutions, but using lower dilution (such as 1:25) or longer time should
yield somewhat contrastier negs which you might or might not prefer.

Hope this helps.


Kayo Matsushita - kayo@xxxxxxxxxxxxx -



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Topic No. 7