Re: rodinal developer for infrared

[JoePaduano@xxxxxxx]

Kayo-- The information contained in Laurie's book about the #15 & #25 filters
producing the same effect with Konica infrared is incorrect. Obviously the
red filter will absorb more blue light ( which the film is sensitive to )
than the #15 orange-tests with the film support this. With the red filter,
there is more contrast overall and less with the #15, due to more shadow and
highlight detail. Also filter factor numbers are only a guide and it depends
on the film being used, how accurate the factor is. Also, the asa chosen to
shoot the film with has no bearing on development time with infrared films,
as they are not given a rating. Development is by time and temp. only.
                                JOE

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Topic No. 20