Tom Kershaw
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Tom, I use the SE 5 kit but I don't have experience with the others, so I can't help with a direct comparison. You can keep the SE 5 going for a long time by judicious use of the additives with a bit of replenishment, but what I like is that you can play with them to get quite different effects from the same paper, from smooth and creamy to very grainy and lithy, just by changing the amounts and the dilution. The extra ingredients give you more control, although also more to experiment with and a consequent chance of getting it wrong. Presumably you could do the same with home brewed additives in the other developers - as far as I understand C and D are just sulphide and bromide additives to give independent control of the levels of each in the developer.
Pete
Three chemicals and you've a lith developer. Hydroquinone,
sodium sulfite, and sodium carbonate in the correct proportions
are all that is needed. You've the chemicals on hand? If interested
I'll post some for starters suggestions. Dan
Dan I think you're missing a few ingredients.
Potassium bromide may or may not be needed although
I don't recall using it while doing some lith printing
several years ago. Dan
Okay, and what about potassium hydroxide or the glycol?
The chemicals you stated ("Hydroquinone, sodium sulfite, and
sodium carbonate") sound perfectly find for something like Dektol
(in fact that pretty much is Dektol that you described) but as we all
know, Dektol isn't even close to a lith developer.
Granted, it's all about proportion of chemicals to manipulate
developer activity, but I think there's a bit more than that
needed. On the flip-side, it appears Easylith is mostly
HQ, glycol, and potassium carbonate.
Dan, Have you used any of the commercial formulas?
I can mix my own solutions but a "ready in the bottle"
product is a convenience. Tom
No I've not used any commercial products. Any product
off the shelf is based upon hydroquinone's infectious
development in a very low sulfite environment.
I'll likely get back to compounding my own although for
the near future my time available for darkroom work
is very limited. I'd like to explore the developer as
a global contrast control. Have you done any
exploring along those lines? Perhaps lith
then bleach then redevelop? Or even
re-lith. Dan
I've used Rollei, Moersch SE5, Champion and Arista liquid. I found Rollei and Moersch (without additives) to be similar. Champion and Arista are also similar and, unfortunately, contain formaldahyde. I like them for Slavich paper, but have pretty much stuck to Rollei otherwise. Both Rollei and Moersch are formalhyde-free as far as I know. I've heard that Fotospeed and Rollei are the same, but I have no direct experience to confirm that.
Mark where do you find the Champion chemistry??
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