Ray, go down to the local pool shop, as I did, and buy a big 5L container of chlorine lowering compound. It's sodium thiosulphate not the ammonium, unfortunately. They got it in in a few days.
They wanted to know why I needed so much - they thought there'd be enoungh to treat all the pools in Qld.
So, there you go, another source of photo supplies! :-)
Originally Posted by Ray Heath
I have attempted "lith-type" prints with this formula. Tim Rudman tells me that Caffenol does not promote infectious development, though. Caffenol does not work very well with the over-exposure/inspection development technique. I guess, rather than lith printing, you would call Caffenol a staining developer. The results are still quite effective IMHO.
Originally Posted by carmenloofah
Tom, on Point Pelee, Canada
Ansel Adams had the Zone System... I'm working on the points
system. First I points it here, and then I points it there...
I didn't like the 2# prices for 'Chlor-Out' sodium thiosulfate, so I kept calling pool places until I got a distributor. They happily ordered me a 25# pail despite being a retail customer...it was cheap too...
Actually it was pretty cheap compared to having it sent a thousand miles from Melbourne. It was 5 Kg in fact = 11#. I just filled the spaces between the big crystals with water. As it gets down I will see how much isn't disolved (if any) and top it up accordingly.
Next I went to Bunnings hardware garden section and got some ammonium sulphate and just spoon some into the fixer. Just think of it as a mix of ammoniun thiosulphate and sodium sulphate. The film doesn't know any better. Maybe a bit slower than the ATS alone but heaps faster than the STS.
Murray (Down Under)
Originally Posted by Murray@uptowngallery
Lye? I didn't know anyone had coffee developer recipes with lye. I'm using coffee, washing soda, and ascorbic acid (in proportions that I think originally came from Donald Qualls)---the results are OK, albeit pretty grainy with most films, and I'm pretty confident in the low toxicity of the soup. You *could* ingest enough sodium carbonate to be a problem, but it's hard to see why or how anyone *would*.
Originally Posted by gainer
The low-contrast "Caffenol LC+C" version really shines, IMHO. (I've been using it with Adox ORT 25.)
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whoa, backup Murray
i must admit i'm no techno/chemo junky
what you posted will make usable fixer?
Yup. Folk add ammonium chloride to plain hypo to get the NH4 ions in there - I just used another salt - the sulphate - knowing that NaSO4 is often used to just slow down development on occasion.
Works OK for me! :-)
Originally Posted by Ray Heath
My good lady wife tells me we have coffee beans on the tree out back. If I strip off the flesh, then dry out the husks, and split the beans to get the kernels I will have the means to test whether the unroasted product will perform better than 'el cheapo' instant coffee.
Is it possible that in years to come I willl wish I'd experimented more with raw beans than sticking to plain ol' phenidone/metol/pyro ?. :-)
I think not.
I must have been thinking about Tylenol. Anyway, I was not being very serious. However, anyone interested in a litho developer should consider using lye. Hydroquinone requires lye or a concoction of sulfite and acetone that generates very high pH, IIRC.
Originally Posted by ntenny
I have drunk some coffee that seemed to have been seasoned with lye. At least, some have called it "paint remover".
I was looking for a local source of ammonium chloride. Apparently one can buy it in blocks for solder flux, or as a feed additive for castrated goats suffering from urinary calculus.
Local goat farmers must have thought I was nuts. One just takes his to a vet and the other apparently has breeders.
I guess that is something I'll have to order from PF.