robert,
the year i was there the campus was downtown, they were
still building.
rich
On Tue, Nov 12, 2019 at 4:49 PM Robert Shanebrook <
dmarc-noreply@xxxxxxxxxxxxx> wrote:
RIT has certainly changed since the 1960s. Take a look at their
website.
Rochester Institute of Technology <http://www.RIT.edu>
Rochester Institute of Technology
Founded in 1829, Rochester Institute of Technology is a privately endowed,
coeducational university with nine co...
<http://www.RIT.edu>
They have successfully transformed from a downtown college focused on
photography and printing to a suburban (1,200 acres) world class
research university with cutting-edge majors in the sciences and arts
including photography and media (formerly printing).
"RIT is one of the top universities in the nation working at the
intersection of technology, the arts and design. We are a university that
is shaping the future and improving the world through creativity and
innovation … We put a high value on bringing goodness to the world."
RIT President Munson
I took a half day tour last month as part of my 50-year reunion. They
outlined an upcoming major expansion in their programs. Very
impressive.
On Tuesday, November 12, 2019, 06:10:37 PM EST, Richard Lahrson <
gtripspud@xxxxxxxxx> wrote:
Lots of folks connected to RIT. I was there just a year mid-60s.
rich
On Tue, Nov 12, 2019 at 1:49 PM Robert Shanebrook <
dmarc-noreply@xxxxxxxxxxxxx> wrote:
Yes, RRR. I was a student of Albert Rickmers, William Shoemaker,
Hollis Todd, and Richard Zakia in the mid to late 1960's. I learned a
great deal from them.
Kodak hired Rickmers in the 1980's to teach statistics in Kodak Park.
He taught a large number Kodak people.
On Tuesday, November 12, 2019, 12:57:55 PM EST, ROBERT KISS <
bobkiss@xxxxxxxxxxxxx> wrote:
Hollis Todd at RIT in the early 70s (formerly of Kodak and co-author of
Rickmers and Todd STATISTICS) taught us Photo Sci students about "The Three
Rs of Agitation: Randomness, Robustness, and Repeatability". The trick is
that things that cause currents and eddies (like the reels and support bars
that you mentioned) cause Robustness to interfere with the Randomness. It
is a fine balance but can be achieved.
On November 12, 2019 at 1:04 PM Robert Shanebrook <
dmarc-noreply@xxxxxxxxxxxxx> wrote:
Keep it simple:
Use time-and-temperature to control contrast/density. Yes, T-Max Films
are more sensitive to time-and-temperature differences than 3D films.
T-Max Film development time differences of +/- 15 seconds are enough
to make a difference. For 3Ds 25% is an appropriate difference.
Use agitation to: remove air bells in first 30 seconds and attain
development uniformity. To examine your process sensitivity expose each
frame in a roll to a mid-gray. The process using your technique. Examine
your results by noting the scanned values or contact printing onto high
contrast paper.
One of the keys to uniform development is random agitation so all
portions of the film have by-products removed. Over-agitation can
cause patterns, most commonly caused by the perforation holes. It is
very difficult to get uniform processing on roll film in a hand tank
that cannot be inverted. Roller transport processors give the best
uniformity.
Suggestions based on several studies:
time > 5 minutes
Stainless steel tanks that can be inverted are much better than hand
tanks that cannot be inverted. best for roll film. If they leak too
much tape the seam after the first 30-seconds.
8, 16, 32 oz. tanks are better than 64oz tanks
Put liquid in the tank then insert reels then put top on
Wrap the bottom of the tank 5 times (5 seconds) on a hard surface to
dislodge air bells,
Invert to equal first 30 seconds.
Bob Shanebrook
Robert Shanebrook - Kodak Film - Photography - Photographic Film
Manufacturing - Rochester - Ny <http://www.makingkodakfilm.com>
Robert Shanebrook - Kodak Film - Photography - Photographic Film
Manufac...
Book: Making KODAK Film , The Illustrated Story of State-of-the-Art
Photographic Film Manufacturing by Robert...
Invert 5 times=5 seconds on a 30 second cycle.
On Monday, November 11, 2019, 07:30:22 PM EST, Dana Myers <
dana.myers@xxxxxxxxx> wrote:
On 11/11/2019 4:05 PM, Myron Gochnauer wrote:
I invert and turn the tank gently (90 degrees, so that the inversionstarts at various places around the tank). I never found
the twirling very effective on its own, although I think I would give acouple gentle back-and-forth ’twirls’ on the 30 second
marks if I was agitating only on the minute. But then I misplaced thetwirly thing, and never really missed it.
I've never invested the time to calibrate for twirling, but the knock-off
Paterson tank
I have leaks when inverted, so, if I ever want to use it... I *did* see a
maker-project
where someone was using a stepper-motor to twirl on a precise schedule,
but, that's
too much mechanical fab for me. If I ever twirl, it'll be the
old-fashioned way.
I *alway* put a spacer or empty reel in the tank to prevent the loadedreel from moving up and down during agitation, and I use
a standard amount of developer that leaves only a small airspace at thetop. I normally use “replenished” X-TOL, so the number
of loaded reels probably doesn’t matter.
By replenished - you keep a full container of full-strength Xtol and used
Xtol with
some protocol for mixing them? I've heard stories that a seasoned tank of
replenished
dev is special, but, I use 1+1 Xtol and dump it, for consistency-sake.
Thanks and cheers,
Dana K6JQ
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