Want formulas using phenidone + ascorbic acidgreenspun.com : LUSENET : B&W Photo - Film & Processing : One Thread
I ran across a couple of references to developer formulas the use phenidone and ascorbic acid or ascorbate, but haven't found the formulas. Is anyone out there familiar with this.
-- George Ingram (email@example.com), July 13, 1999
George, Try the Photographer's Formulary. They've got what your looking for. Walter
-- Walter Massa (Massacam@aol.com), July 14, 1999.
I am not aware of any such formula sold by Photographer's Formulary, unless it is brand new. (I just took a quick look at their listing for pre-mixed developers and did not see one.) The only formula that I know of with this mixture is the new Kodak X-tol. I'd like to get hold of such a formula myself.
-- Ed Buffaloe (firstname.lastname@example.org), July 14, 1999.
George, might i suggest modifying a formula... i have no formulas that have both agents in it. however ( tho i havn't tried it yet ) i have a formula for a Phenidone solution: 750ml water @ 120f, 6g Sodium bisulfite, 2g Phenidone, cold water to make 1 liter. I would check for advers reactions BEFORE i started adding Ascorbic acid to the formula. But i would start adding it in different quantities and see what i get. go through the whole clip, process, clip, process, clip, process, thing for a few hours. I have also read that you can subsitute Phenidone for Metol by 10% of the amount of metol for the Phenidone measurement. This is also said to increase the effective film speed. The Phenidione will probably yeild a very very flat thin neg. adding a little Hydroquinone should kick up the highlights sufficiently. Most of the masters have played with modifying the developer solutions, i can only guess that the reason you cannot locate such a formula is that it sounds better than it really is. Regardless i am very curious as to the results of your testing, please let me know what you find out, and good luck. Sean
-- Sean (ZBeeblebrox42@yahoo.com), July 14, 1999.