I have some dozens of rolls of old Orwochrome and Svema color reversal that call for CD1 as the color developer. I’d specifically like to fully recreate the historical process using the appropriate CD-1 color dev. If anyone has a source for this chemical that will sell in small batches to the individual, please let me know. I can’t easily purchase it from Sigma Aldrich or other chemical supply houses.
And to get in front of things - I am well aware of the hazards of this chemical. I know there are long term dye stability problems with CD-1 development. And yes I know I can cross process this film in chemistry using CD-2, CD-3, or CD-4 (which I already have in my darkroom and used for other old films).
I do not support you in that,, This element will not be obtained easily. And if you get it, it will be very expensive.
In the end, you will find that controlling the times of this process is not easy at all.
Even the official documents of ORWO used to categorize the times according to the categories of films produced by ORWO, not to mention, and today you want to use that format with (E6) films available in the market, and inevitably it is Fuji and Kodak.
If you are like me and like to research old formulas that work on cold temperatures, then allow me to recommend the process AP 41 >> it depends on another ingredient which is (Ethyl-oxy-ethyl-para-phenylenediamine sulfate) and the great scientist told me the man (PE) engineer that this element is very similar to (CD4), and indeed I used (CD4) in the same quantity and produced those beautiful pictures with Valvia movie attached.
The development times are uniform for all categories of films, and this is very important and is the key to success.
As for if you insist on preparing Orwochrome, then from the author of my limited experience, I think that you can try using (CD2) and I think that it will mostly work.
But the problem that you will face at that time is to work with the dissolution of the component (CD2).
This ingredient will not dissolve with this recipe unless it is dissolved in a quart of boiled deionized water and then stirred very well.
You prepare the rest of the recipe with boiling deionized water.
And you mix the two soba with continuous stirring without stopping, and while stirring you increase the water until the level reaches one liter and do not stop stirring at all, even if you feel that your arm will get cramps, do not stop stirring at all until you find that the solution has become transparent and clear and Pure without any sedimentation and without any oil stains.
good luck my friend .
https://www.chemicalbook.com/ProductDetail_EN_447007.htm
