Quote:
Originally Posted by john_s  Ryuji, is your polysulfide + selenium toner the formula given in the Kodak pdf link on your website? If so, do you start with a standard potassium polysulfide + sodium carbonate toner (more or less what Kodak Brown Toner was) and follow the Kodak instructions in CIS268.pdf? |
Oops, I missed your posting.
I started making my combination toner (a class of toner containing both polysulfide and selenium) BEFORE Kodak published CIS268, and the formulae differ. Also mine has an additive that reduces the odor (but it does not eliminate it) and the risk of stain with some paper (such as AGFA MCC). This additive is not offered by common photographic chemical suppliers (that is, there's no easy way to buy it). The compound itself is not that esoteric but none of the chemical engineers I work with seem to be able to find a source that's smaller than 220lbs (or something like that) drum. So in interest of saving myself some trouble, I'm not ready to described it much at this point.
You can make the toner described in CIS268 from raw ingredients. What you need to know is described in the obvious website:
http://wiki.silvergrain.org/wiki/ind...tle=Poly-Toner
With the other interesting thread in mind, I would say that the toner is the most rewarding area to make yourself because most of the good products are gone or never offered before. However, making toner from scratch is always associated with safety risk. Selenium dust, H2S gas, caustic ingredients, etc., and ALL of the strict darkroom safety precautions and more are in order. I've also got a few inquiries as to whether I'm willing to license my toners so that someone can make them, but the problem is that few chemical plants today are equipped with necessary safety features and contamination-free setup. (The concern is the manufacturing of the toner can contaminate other things they make in the same plant!)