If Ektalure were still available. I would buy it. Simple as that.
Ektalure could not be recreated on an industrial scale due to EPA rules about toxic chemicals, but it could be recreated in the home lab if you are willing to work with Cadmium and Mercury salts.
I might add that Opal and Medalist suffer from the same problem.
PE
maybe there's potential for growth at a fine art supply level?
The supply train for both of these salts starts with mining, then proceeds to the manufacturing of the pure salts and then their use. The increase in use of Cd and Hg would increase pollution at each step by an amount that is not available to me. I do know that at the end of the pipeline, for every 10 g of Cd you could have used up to 100 g of Ag (rounding). This means your personal lab effluent would contain up to about 30 mg of Cd for every sheet of 8x10 (again rounding).
Add in Hg and a few other odds and ends such as Pb (Lead) and you are upping the environmental burden.
Is this the direction you want to go? If so, lobby for it! I for one don't want to touch it. I have the chemicals to do it right here, but have not opened that can of worms.
PE
Ektalure, Medalist and Kodabromide among others.
The tone and curve are paramount here. People talk about grade and mix it up with contrast, but there is more to grade (and contrast) than just the curve and no one here gets that. You don't get it until you make identical papers with formula variations that control toe, shoulder, mid scale and tone among just a few properties.
PE
Yes, you are spot on so far.
You can add Cadmium two time or one time at two different points in making and get 3 results in toe, shoulder, contrast and image tone. Vary those and play with Mercury and Lead and you can make a whole line of subtly different papers with beautiful tone scales. Coat the emulsion on different papers and get even more variety.
It goes on and on. Like making good beer or wine. And you have to be a good printer to connect the variations in properties to the visual impact.
PE
Given the toxicity of these compounds, are there any substitutes that are worth investigating?
Nothing comes close and some that are marginally suitable are out of our reach for a variety of reasons.
PE
Me? I guess I would go for Medalist.
I am very interested in working with experienced lith and bromoil printers to test various handmade papers for suitability. I would prefer to work with folks interested in testing a number of different papers over a couple of years time period. If anyone is interested, I'd love to discuss it. editor@thelightfarm.com. I only check email once or twice a day, so my "partners" also need to be patient!This will be "open source" research, so expect at least one Light Farm article over the course of the collaboration.
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