Help Ian G once again
I hope Ian see this as last year he gave me some wonderful chemical breakdowns for some various toning and I know want to mix from scratch Dev, Rapid Fix*non hardening* and hypo clearing agent.
I usually work in 8 litre, 16 litre to 25 litre working solutions*yes I know big trays* so if anyone has any formulas that would help me along I would appreciate it.
I like Kodak Dektol and a rapid fix and buying packaged products are killing me these days.
Dektol is essentially D-72.
I imagine you could just use sodium sulfite as a hypo clearing agent.
Get the Darkroom Cookbook by Anchell. Lots of recipes in there.
Just back from the wonderful Greek city of Athens, where we saw the battle-scars and the riot police in action just feet away . . . . here's some initial comments.
Originally Posted by jim appleyard
Along with a couple of others I cross-checked as many of the DCB formulae as I could with Steve for the 3rd Edition. Unfortunately virtually all US publications took formulae from publications like the Photo Lab Index's which are riddled with errors and these errors have been repeated in numerous publications
We checked where we could with the original manufacturers publications and found a significant errors, these are scientific formulae not recipes and accuracy is more important.
While D-72 = Dektol in practice, the commercial formula for Dektol will almost certainly vary slightly. I'm far more familiar with how liquid PQ developers are re-formulated using different alkali's to allow higher concentrations and more economic manufacturing costs.
The formula linked to isn't 100% correct as Kodak themselves state the Metol as 3.1g and the KBr as 1.9g in Professional publications,
An effective HCA is just a 1%-2% Sodium Sulphite solution, that's all that's needed. There are various formulae for Kodak Rapid fixer, it's evolved over the years, I'll PM you Bob.
Last edited by Ian Grant; 12-27-2008 at 02:22 PM. Click to view previous post history.
You're not kidding! I bought the Photo Lab Index in the late 1960s or early 1970s and the briefest glance from an inexperienced photographer revealed countless obvious errors. What a debacle! I could never understand how it came to be popular.
Originally Posted by Ian Grant
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D-72 = Dektol.
The major differences are minor. Dektol is packaged in such a way that the HQ and Metol are protected from being destroyed by oxygen, and there is a sequestrant in the prepackaged version. The last formula I saw used Quadrofos.
Unfortunately many US writers/photographers thought and a few still think it's accurate, and Silvergrain/Ruyuki Sukuzi is one of the worst culprits, when he quotes formulae correctly I might try and spell his name correctly too.
Originally Posted by john_s
Look in: www.apug.org/forums/articles.php for the formulae you need.
So, Ian...you're saying that the 3rd edition of DRC would have very accurate formulas in it?
I had been thinking about picking this up...
Found my copy under the tree. AFAIK, there are no errors, however, Steve Anchell has a spot on his website for any errors that come up:
Originally Posted by PVia