Hi Bob,Bob Carnie said:the plant in switzerland never got into trouble. It was the UK plant that came under receivership, Ilford is now producing P3x chemistry and paper , I recievied a shipment this week and am now cleaning the processor to continue production. I produce both traditionally and digitally on this material
Always interested in reading a book based on this process.
Fotohuis said:If you are talking about the slide R3 process, it's discontinued. No R3 paper is available anymore and also the smart Amaloco R3 transformer kit has been discontinued like the other chemical suppliers.
Robert
davetravis said:It is a type "R" paper/chemistry process. Dave.
You are correct sir! Guess I just showed my age. I've been calling it type Rb.e.wilson said:Perhaps I'm arguing semantics where rules don't exist, but I thought Illfochrome/Cibachrome was knows an a (the?) P process (or just Ciba), as there is no reversal step, and that R chemistry all had a reversal step:
C = Chromogenic - colors originate in chemical reactions between "undeveloped" dye precursor molecules in the emulsion and a common reduced "dye developer" molecules in the color developer that reacts as it is oxidized during the silver reduction.
R = Reversal - Colors originate the same way as they do in the chromogenic process but instead of reacting with the silver exposed to light, the dye developer molecules must react with silver halide particles not exposed to light in the initial exposure. The exposed silver must be reduced first, then a second reversal exposure prepares the balance of the silver for the chromogenic reaction.
P = Ciba/Ilfo - The fully-developed dye molecules in the paper emulsion are selectively activated by light then bleached by the chemicals in part 2. We see the dye molecules felt behind. (Actually I think the process involves the activation of a third type of molecule, then that molecule acts as a sort of flag to start the bleaching proces at that location, but Ciba/Ilfo never tells anyone how their chems work).
All that being said, they are a pain in the rear to master with any consistancy.
Another well known problem is the criticality of the time/temperature of the chemistry. A +/_ variation of only 1 degree C will affect the density and balance of the print.
Many printers make what are called "contrast masks" using kodak pan b&w film.
Another concern is the ability to predictably achieve a pure white. Many times the final print will have slight, but noticeable, shifts to of the primaries.
The main problem is with each new pack of paper that has a different emulsion number, the starting color balance for the complementary colors of yellow, cyan, and magenta can, and most of the times, change. That means the printer is always having to make new test prints. (mostly strips).
This process can be very frustrating, even for me.
The emulsion surfaces are very tough.
On a sour note, the Ilford company recently filed Chapter 7 in Sweden.
I am not aware of any books specifically dedicated to Ilfochome printing. Maybe if they survive, I will do one.
I have done it both ways and both have worked fine. I don't know if there are differences as I have not tested the same exposure done both ways. I use a 30 second water soak so my chemistry volumes stay the same. This makes reusing chemicals easier for me.captainwookie said:Ive also began to toy with Ilfochrome. However, Im confused about one thing. Nowhere in Ilfords instructions does it mention anything about a pre-soak. Is a one minuet pre-soak necassacry for Ilfochrome?
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