Split Grade was the first way the variable contrast was printed. Commercial printing made use of special two filter timers. Both filters were used sequentially. In the beginning, filters were made by the lab. DuPont published the how to: which dyes to use. After several years on the market, filter sets were made. These were considered expensive so the use of 2 filters continued in many labs.
MAR 8,2024 UPDATE: The march shipments have arrived. Same film, or so it seems; same price. The allotments have increased. Two sample points:
A: large seller– December product less than 2K rolls; this shipment over 2K rolls available
B: small retail shop– December product 300 rolls; this, march shipment, 1K rolls available.
They may have worked on coating/drying procedures; the making of foundation supplies. They haven’t received much adverse comment, in fact, most of the onliners seem pleased.
the maskless returns. A new phase of color film — flashing back to the middle of last century.
Shooting the Moon — not a moon-shot, rather, it means aiming for something you don’t intend to hit; your reason could be a signal, gesture to investors, an effort at proving, or testing yourself. You do something to see how others react.
2022 Numbers. Not a great business.
Consider you are in a shrinking market, you may have maxed out your customer growth. Your standard item is a dominant in this shrinking market, even so, newer companies seem to have great multiples of growth in both top and bottom line. These folks are tapping into a younger group having more expendable funds. They don’t print in a darkroom. Your the dominant darkroom vendor, but this is to an aging population — a population with reducing need. They just don’t shoot, nor print as much as just 5 years ago. This isn’t the analog rebound group.
Analog rebound is among the 35mm 35 year old photographers. They may shoot film, but they send it to a lab to soup and scan. Some of them have process only, these are the ones with a camera-scan setup. Camera-scan has become a dominant imaging platform in just a decade. In 2013, talking about it was segregated on the Forum boards — it was ‘HYBRID’ — a bastard not suited for inheritance in the Church of Photography.
The December rumor holds that Harman will produce another Phoenix for shipment March, 2024. They can easily make film. Will they alter, by how much, a rev. 2? Will this remain a film-for-scanning.
Are they prepared to make a color paper if(when) FujiFilm drops *Archive. Three labs that produced large RA-4 prints in the US have closed their wide-format Poliettronica [https://webionaire.com/2022/06/26/ra-4-big-lab-printing/ ] lines; switching to ‘dry-lab’ printing for their display clients.
Sensitivity Isn’t Output
Spectral sensitivity curves depict the film’s “shooting” conditions. Its response to the colors depicted. The manufacturer tells you the color of the testing light used. The Spectral Dye-Density curves represent the absorption of the dyes formed after processing. These are used for adjusting the system used for making prints(or scans.) Sensitivity is used during camera setup and use. Dye-Density is used during output. Without this DD curve, you don’t know what the emulsion is expected to produce. Harman doesn’t publish this with “December 23” Phoenix.
What Next
effect of DIR upon color emulsion. neutralizing secondary absorptions of the M and C image dyes
CC:: colored coupler | UC:: uncolored coupler
DIR: Development Inhibitor Releasing compound. An example of a well regarded DIR is 1-phenyl-5-mecapto-tetrazole. This can be imagewise generated and eliminated from the coupling postion during dye formation. DIRs have been patented which enhance sharpness, reduce ‘graininness’, and, via interlayer interimage effects, produce color correction.
[color coupling and masking can be separated]
DIR compounds are disclosed in “Developer Inhibitor-Releasing (DIR) Couplers for Color Photography,” C. R. Barr, J. R. Thirtle and P. W. Vittum in Photographic
Terms:
block dye: theoretical dye having equal absorption of light at each wavelength within a given continuous range of wavelengths and no absorption at all other wavelengths of interest. [Giorgianni]
calibration: procedure of correcting for ay deviation from a standard. [Giorgianni]
coupler: an organic compound which reacts with oxidized developing agent to form a dye.[Giorgianni]
cross-talk: transfer of information from one color channel to another.[Giorgianni]
interlayer effects: chemical reactions that take place among the various layers of a photographic medium. …used for color signal processing.[Giorgianni]
Many have expired. JOBO wasn’t generous in their search for prior art, particularly on reels and water jackets.
Hobby men bragging about their tool raised the question. Germany or China: who do you think is their favorite maker of things mechanical? As always, consider their fear of foreign languages.
When searching, use :JOBO LABORTECH.
id
publication date
title
US-4448365-A
1984-05-15
Film developing spool
FR-2503403-A1
1982-10-08
DEVELOPMENT DRUM FOR PHOTOGRAPHIC EMULSION MEDIA
DE-3941492-A1
1991-06-20
DEVICE FOR DEVELOPING PHOTOMATERIAL
DE-3208968-A1
1983-09-22
Device for developing photographic paper
EP-0076869-A1
1983-04-20
Device for the development of photographic material in a rotatably driven cylindrical drum
US-4473283-A
1984-09-25
Arrangement for developing photomaterials in rotatable drum
DE-3101706-A1
1982-08-26
Device for developing photographic material having a rotating drum
DE-3143635-C2
1983-10-27
Discharge device for treatment liquids of a device for developing photographic material
DE-3113465-A1
1982-10-14
Processing spool for holding a photographic film strip in spiral form
DE-3102074-A1
1982-08-19
Device for developing photo material having a cylindrical drum which is driven to rotate
JOBO Patents
Key personnel: Helmut Petsching, Walter Kremer, Rainer Bernhardt, Johannes J. Bockemuehl-Simon
2010 “insolvency”
Some Past concerns
Jul, ’08 [among first posts on Forum] “I think the tempering part of my Jobo CPP-2 is busted.I’ve noticed that lately it doesn’t seem to warm up the water. Anything I can do to fix it?”
Aug, ’08 “The fabrication of parts was discontinued in November of 2006,and Omega-Satter USA took over the assets of Jobo photo processing products. I have no idea where you would get a “repair.” The usual fault was the circuit board, which was easy and cheap to replace some years ago. Now, whatever parts you can buy is dependent on wherever you can find them. After using a Jobo for some time you will realize that it would not be the end of the world if it gave out, and lots of film people have never used one”
Sep, ’23 “when you want a reliable machine working for 30+ years, you have to pay a certain amount of money.Also if you consider that the JOBO products are produced in Germany with highest environmental standards and protection + social standards for the workers (none of that is given in China).“
Sep, ’23 “I have a CPP3 Jobo unit that is not working properly right now. the control panel is not operating and I am told by Cat Labs who sold it to me that its probably the fuse. Problem in this unit some genius in the factory decided to put the fuses in the guts of the motor unit and taking it apart is not a user friendly issue. I am being told a new motor is going to cost me $3000 to replace which is 2/3 the cost of the machine when I bought it. “
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