WILLIAM GRUENEWALD a écrit :
Those of you who have responded to my printing problem, I thank you, and I
took your advise. However, nothing has changed. I have persistent and
extremely long printing times with this material - up to 140 seconds, and I
cannot believe that this is "normal". I'm using the Beseler 45 Universal
Light Source - 4x5 diffusion, and a Nikon N2.8 enlarger lense for 35mm work,
enlarging to 8x10 with this paper.

Processing is standard at 30 degrees for the Ilfobrom process, done on a
Jobo CPP/Lift, using Ilfochrome chemestry - always fresh chemestry.

The resulting print is characterized by a dark, dense image. There is a
slight shift toward magenta. At 140 seconds exposure, the image finally
begins to look normal. However, with these long exposures, I've had to make
5 exposures at 20 seconds each to avoid overheading the Beseler or buckling
of the slide - non-glass carrier.

I've asked before if this is normal, and I'm asking again: Are those
printing times within what is considered "normal" for this process - I
understand that the paper is 'slow'.

Tanks again!!

No, it is not normal.
My times are around 3 stops longer than Ilford Multigrade IV paper
without filter which is around 20-40 seconds at f/8 for a 30x40cm (12x16").

Chemistry is either P-30 (no more made), P3.5 (5 liters, all liquid,
replaces P-30), P-3 (larger quantities) or P3.X (large quantities,
replenished).

Note that the contrast of Ilfochrome paper is much lower than B/W or
RA-4 negative paper as slides are very contrasty and though paper must
be very soft to restore a normal contrast (but global slide+paper
contrast may be too high).
This means that when you adjust an exposure, you must use larger values
than thos common in B/W: a half stop in B/W is a big difference, with
Ilfochrome you easily change it by full stop values and when you're in
the 40" range, a full stop more exposure is another 40" ...

To avoid to overheat the film/slide, you should put a hot mirror filter
between the enlarger's lamp and filters.
You can buy such filters at a reasonable price at B&H
(www.bhphotovideo.com), search with "Rosco hot mirror"
For those wanting to replace their dichroïc filters, they also sell MCY
or RGB filters.

Good luck,
Claudio Bonavolta
http://www.bonavolta.ch