Define "real developer": One in which the actual developing agent is identified and quantified, for starters, and one in which there are no ingredients that do not contribute to the working properties of the developer. If this developer is only distinguished by its over the counter ingredients, I don't see the point in commercial production.
I see no point in the commercial production of Caffenol.
Pyrocat-HD, Moersch Tannol, PMK,WD2D, 510-PYR0, Prescysol, DiXactol, etc. are examples of commercially available staining and tanning developers.
I don't think Caffenol meets my definition. What is the actual developing agent, how much of it is contained in a given quantity of coffee, and how do you know? What is the chemical composition of coffee, and how do its components contribute to the working properties of a developer made with it? If these things are known with any certainty, I've never seen a published description. I understand the novelty of making a working developer from household ingredients, but I also understand the limitations of that approach, and frankly don't understand the persistence of the attraction beyond its novelty. Any and all of the developers listed at the bottom of your message are more effective and more reliable, and most are published formulae. Just calling a spade a spade.
Some of the developers I listed are open literature published formulae - others are proprietary. "more effective and more reliable" depends on the application and the results obtained, IMHO.
Dr. Williams' paper illustrates my point very well,
"Coffee contains just about every type of molecule known to nature, including proteins, lipids and carbohydrates"
and among them several that might act as developers, but exactly which, and in what proportions, and the quantities of which, no one is saying, and the effects of the myriad other compounds are completely unaccounted for. Effectiveness can be quantified as the quantity of a sunbstance required to produce a given degree of development, and reliability depends on the ability to make a developer of known properties repeatedly from a developer's consituent chemicals. Those definitions would serve well enough for me, anyway.
Caffeic Acid and Ascorbic Acid - two very interesting anti-oxidants - and both will develop film . Google them.
For recipes, see: http://silent1.home.netcom.com/Photo...tml#Caffenol_C
The only time I decided to use coffee based developer, I used coffee which had been brewed and the remainder left in th pot for a few hours. You know, that stuff that smells so strong youthrow it away and brew fresh.
I did this prior to reading anything about using Folgers, or any other instant crystals. Also, I had not read much about ascorbic acid. As a result, I just simply added some carbonate to the coffee and developed a couple of sheets of HP5+ by inspection for 25 minutes. The resulting negatives were tanned, thin and very easily printable. subjects in deep shade were hardly visible on the negatives, but printed well. They made excellent prints with palladium.
Perhaps it is time I tried adding ascorbic acid to speed up the process.
I just looked at your Caffenol LC+C.
I think I will give it a try with lith film as it is simpler and cheaper than LC-1 or altered Rodinal. I like to use lith film in camera to test new lenses.