Photographic papers are, technically speaking, developed in a similar way to film. However, for various reasons, most film developers are not suitable for developing photographic papers. But, in the interest of completeness, I would like to list two general purpose formulas that are capable of developing both films and papers! (Also see DK-93 here)
These developers will surely appeal to those who are rather frugal and/or to those that want to keep things nice and simple in the darkroom. Hmmm, both cases pretty much describe me!
General Purpose (PQ*) Developers for film and paper. Why have two developers when only one will do :)
Ilford PQU FX-12
Water 600ml 600ml
Sodium Sulfite (anhyd**) 50.0g 60.0g
Sodium Carbonate (anhyd) 60.0g 60.0g
Hydroquinone* 12.0g 10.0g
Chloroquinol - 6.0g
Phenidone* 0.5g 0.5g
Potassium Bromide 2.0g 1.5g
Benzotriazole (1% solution***) 20ml 35ml
Water to make 1 liter 1 liter
Ilford PQU FX-12
Dilution for film 1+19 1+7
Dilution for paper 1+9 1+3
*Note the absence of Metol in these formulas. Those with an allergy to Metol will be much happier with these developers. PQ means Phenidone/Hydroquinone.
**Anhyd mean anhydrous. You will see this abbreviation in many formulas. Other common abbreviations are Mono for monohydrate and Crystal for the crystalline variant. They are NOT usually directly interchangeable - use the correct type.
*** To make a 1% solutions add one gram to 99ml water
Note: Phenidone is very difficult to dissolve into this solution. Instead, make a solution of 6 grams Sodium Bisulphite in 600ml warm water. Add 2 grams of Phenidone to this and dissolve (it will take 10 or 15 minutes of stirring). Make up to 1 liter with water. Now each 50ml of this solution will give you 0.1 grams of Phenidone. Alternately, dissolve 1g of Phenidone in 90ml on isopropyl alcohol (the 98% stuff from The Formulary is just the job) and then make up to 100ml. Now each 10ml of the solution delivers 0.1g phenidone. It keeps very well this way too.
Experiment to find your times for development with these. The Benzotriazole is an additional restrainer.