post modem .. just past the library
ideas in threes: more than detail. if detail is the only thing
exposure stack — (dupe)
focus stack– (origina) -> light — > dark
a strongly held rationalization attempt to explain irrattionalism
tmax…
TMAX and UV blocking. the dye is to reduce static. not present in 400-2 roll and sheet. it is in 35mm film.
TMAX 100, even after 2007 , still has the layer. helps in scanning and in film-out machines.
and XTOL. Silvia Zawadzki [1943 – 2020] and Richard Judson Dickerson [1929 -2015]
sometimes we break ground to bury something.
until the 70s, photographic processing was an evolving effort, having more myths than method. Not saying that those who hold to myths aren’t ardent. Indeed, they are probably more committed than those prepared to believe beyond their own observation; their method doesn’t stand up under the washing of myth.
modulation transfer is a Kodak term for “sine-wave response”, or “contrast transmission function.”
the emulsion is 3-d … it has depth. developer constituents and agitation methods control exchange of chemistry with the emulstion
Fixing bath capacity. a bath near exhaustion will apparently clear the negative but some of the not-easily soluble salts will remain in the emulsion. Procedure: mix fresh fixer; record time to clear a piece of film; mark that on the processing board for that chemistry. When the time to clear that film approaches double, dump the fixer and remix new.
FT-1 fixer test (hypo check). RST: residual silver test. RHT: residual hypo test.
Tanning developers work by hardening emulsion gelatin more in the exposed areas than in the unexposed, lesser exposed areas. The highlight of the negative hardens more than the shadow. This hardening limits the developing action. Chemicals don’t penetrate as well. There can also be a stain, though the stain isn’t a part of the hardening process. Many developing agents will tan and stain. D175 is an example formula of a generic developer formula that can be used for experiment.
monetary theory. freshwater economics. friedman monetary theory. all need a baseline of start and stop. they fail more times than Greenspan could explain. The internet xboyz use money to further their bullying. they are gingerbread cowards living beyond their meanings.
fstop printing has been used since digital timers entered the darkroom. In 1985 Gene Nocon introduced a timer designed specifically for the f-stop timing method of printing.
In making prints setting a starting point on the timer (and lens aperture) is first estimated. Using prior experience, yours or others, will get you going. All the emulsion makers provided booklets, guides, even calculators that could get you a good start point.
The “step test” is a basic skill shared by all printers. Making this test strip provides visual estimate of print density (exposure) on a single piece of paper. The timing sequence can be in increments of the same amount or in varying amounts. Linear scale printing can make judging intermediate amounts more difficult than fstop method. When dodging / burning, this is harder with a linear scale.
| 5 | +5 =10 | +5 =15 | +5 =20 | +5 =25 |
| 4 | 8 | 16 | 32 |
With split filter printing using fstop timer with 1/4 stop gradation provides most of the control used in exposing BW prints.
Nocon patent June 1985 for timer element. He made use of British government grant money to make the first ones.
He also had a design patent for the key layout. Simple calculator style system with fractional stops .
His patent spends much of its text describing the calculation method.
[https://www.asmp.org/articles/gene-nocon-passes.html ] 404 link
Mr. Nocon, whose photograph of Prince Andrew and Sarah Ferguson was used as the royal wedding commemorative stamp in Great Britain, died after suffering a heart attack Nov. 20 ,2011 at his home in San Diego. He was 65. born on Dec. 26, 1945. lived in London from 1973 to 1990 and earned the Ilford Printer of the Year award in 1980
F-stop Printing
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