What is KBr? My attempt to research it is not working out very well.
Thanks Dennis
With KBr in the amidol solution you can get nice warm tones on bromide papers.
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And I always thought it was the desire for those cold, steely, black, Weston-like tones that drove folks to amidol. Well, shows how little I know.
John, Mount Vernon, Virginia USA
Take a look at these, all printed on Azo in amidol. Granted, Azo is a silver chloride paper, but I've gotten warm tones with Kentona in amidol. I think that's a chloro-bromide paper. (I'm not sure though. Somebody familiar with Kentmere stuff correct me.) Steve hates cold tones.
Truly beautiful print color. I shall try it with Michael Smith's formula. What is Yorkshire Red? I want to try to duplicate the tea as closely as possible.
Ok (presuming you aren't just taking the piss out of me.) (which I need from time to time) Yorkshire red is a black tea with a reddish tint but I don't think that is important. I put the info in because I know it is a popular variety in England and it is difficult to find quality tea in the US and when you do find it it is very expensive. So don't use it. I think any black tea would come close to the same color so go for cheap stuff. For the record I actually did use Yorkshire Red because I have some gone stale. And the color of the print really didn't come across in my scan and jpeg. It is much richer and a bit more redish brown in reality.
thanks Dennis
Beautiful print Dennis.
I've always found Smith's amidol formula to be quite receptive to adding KBr to increase warmth. Pretty much get whatever kind of effect I want. This depends a lot on the paper too. Anso 130 is less receptive to warming but at 1:2 with 20 ml or more additional KBr, I can improve warmth slightly. Again. the paper itself is always a big factor.
Thanks Dennis, this is pretty interesting. Did you notice any change in color once the print was in the fix? Or could you just go by what you were seeing in the stop bath (as well as one can under the safelight)? As far as I know about tea staining it is the tannins that do the work so I think you are right that any black tea will do it, no sense wasting the good stuff.
It uses a minimum of 4 ml (going off memory here) KBr per liter but you can increase the KBr as desired to adjust warmth. You can get at least 24 hours, usually 30 hours solution life.
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