Selon Stephen G. Anchell la formule originale du Rodinal estSolution A :p-Aminophenol hydrochloride 100 gpotassium metabisulfite 300 geau à 50° c 750 mlCompléter à 1l en eau froide.Solution Beau froide 300 mlSodium hydroxyde 200gcompléter à 400 ml.Mettre la solution A au bain mari avec des glaçons, ajouter doucement 280 ml de la solution B, lorsque le mélange change brusquement de couleur en s'assombrissant, ajouter goutte à goutte jusqu'à ce qu'apparaissent quelques cristaux.La solution en vieillissant devient brun sombre mais peut se conserver plusieurs années.Précautions :ne pas remplacer le métabisulfite de potassium par du metabisulfite de sodium, inapproprié en l'occurence.Le mélange soude eau doit se faire par chute lente de la soude dans l'eau, pas l'inverse, risque de projections et de brûlures très graves. Travailler avec des gants, des vêtements de protection et des lunettes de laboratoire. D76A 4 euros la solution de D76 pour 1 litre, il est itéressant de pouvoir fabriquer soi-même son révélateur.Le D76 est un des révélateurs les plus populaires et les plus utilisés. Sur chaque pellicule achetée, le temps de développement est d'ailleurs donné.De plus, c'est un révélateur compensateur, à granulation assez fine qui en plus permet de pousser légèrement la sensibilité du film lors du développement.On procède comme ceci :Préparation.2 g de Génol100 g de sulfite de sodium anhydre5 g d'Hydroquinone2 g de Borax.Vous versez la poudre dans 800ml d'eau à 70 degrés (kodak recommande 55 mais le borax industriel se dissout très lentement à cette température)Vous agitez jusqu'à dispartition complète du solide.Vous complétez avec de l'eau pour faire 1 litre.Laissez refroidir, votre révélateur est prêt.La version D76d est plus intéressante à fabriquer car plus stable et se garde mieux (c'est celle qui est commercialisée actuellement )Kodak D-76dmetol 2.0ghydroquinone 5.0gsodium sulfite (anhydrous) 100gborax 8.0 gboric acid (crystalline) 8.0gwater to make 1 liter H&W ControlThis developer, invented by Harold Holden and Arnold Weichert in the late 1960's, was patented in 1973. The patent has expired, and the formula is now in the public domain.H&W Control was sold in retail stores for several years, but did not receive widespread distribution. Before being commercialized, it was used extensively by the US military for developing surveillance films, the kinds used by top-secret high-altitude aircraft of the day such as the U2. Today's Bluefire HR developer is an updated version of H&W Control, reformulated for multi-year shelf life. When mixed fresh, the H&W Control formula disclosed here will give you the same sensitometric results as the commercially packaged Bluefire HR.Solution A: Water 50 ml Sodium sulfite 1 gHydroquinone 0.16 gSodium carbonate 4.6 gPhenidone 1.1 gSolution B Water 50 ml Sodium sulfite 8 gAdd Solution A to Solution B, then add water to make 132 ml of concentrate. Phenidone dissolves with difficulty. Use water at approximately 55° (approximately 130°F). Mix the chemicals in the order shown, and be sure each is completely dissolved before adding the next.This is a concentrate. To use, add water to make to 2.1 litres of working solution. Process at normal development temperatures with intermittent agitation for 14 to 18 minutes. Use with Bluefire Police, Agfa and Fuji microfilms, and Kodak Technical Pan. Gives unacceptably flat images on ordinary films. Shelf life is approximately six months in a full, tightly capped glass or PET bottle, less than one week in a partly full bottle. Refrigeration prolongs shelf life. Superlatitude DeveloperThis developer was disclosed by the prolific photochemist M. Levy in "Wide Latitude Photography," Photographic Science and Engineering v. 11 p. 46 (1967). It grew out of her researches into the problem of capturing wide variances in luminance (i.e., a long gray scale) on hard, thin, high-resolution films. Levy worked at the US Navy's Photo-Optics Technical Area at Ft. Monmouth, New Jersey, and her formula has been published elsewhere as "POTA." Gives images similar to Bluefire HR developer but at significantly lower effective film speed.Water 750 mlSodium sulfite 30.gPhenidone 1.5gWater to make 1 litre Use water at approximately 55° (approximately 130°F). Mix the chemicals in the order shown, and be sure the sulfite is completely dissolved before adding the phenidone.Begins to oxidize as soon as it is mixed, so mix it just before use. Designed for developing sheet films processed in trays with brush agitation, but works well in small tanks. Experiment with agitation technique as well as time and temperature if your initial results seem streaked or mottled.Ilford ID-68One of the best all-round home-mixed developers is Kodak's published formula for D-76, which has the unfortunate property of increasing pH over time. This changes its activity (Kodak's commercially packaged D-76 does not have this flaw).This Ilford formula does not change pH over time. Use the same time and temperature regime as you would with D-76, and you will get negatives that are indistinguishable from what D-76 would give you, but with more consistency week after week.Water 750mlSodium sulfite 85 gHydroquinone 5 gBorax 7 gBoric acid 2 gPhenidone 0.13 g*Potassium bromide 1 gwater to make one litre *For ease of measurement, add 20ml of LiquiPhen 5% liquid Phenidone to 80 ml water to make 100 ml of solution. This 100 ml volume of solution is now a 1% solution, containing 1 ml of Phenidone. You can substitute 13 ml of 1% solution for 0.13 grams of Phenidone.Use water between approximately 25° and 50° (approximately 75°F and 120°F). Phenidone dissolves more easily in hotter water. Mix the chemicals in the order shown, and be sure each is completely dissolved before adding the next.Germain Fine-grain DeveloperOriginally suggested by Morris Germain in the 1930's, this formula has never been widely used, but it deserves to be.It has also been posted on the Internet, along with some initial speculation, later abandoned, that it may be the original formula for Harvey's 777 Panthermic, which was introduced commercially in 1938. The speculation was based on this formula's use of 7 grams each of three ingredients. The Internet article is fascinating, and can be seen here: unblinking eye 777 article.It is not possible for us to know the formulation of Harvey's 777 Panthermic, as originally sold by Defender, later by Dupont, and currently by BPI. That formula was never made public. This does not detract from the usefulness of Germain's developer. It has a very long shelf life, and gives outstanding images on most black and white films. Water 665 mlMetol(Metol causes dermatitis in some individuals.) 7 gSodium sulfite 70 gParaphenylindiamine (base)(Poisonous. Handle paraphenylindiamine with extreme caution. Causes severe dermatitis in some individuals. Pronounced staining properties.) 7 gGlycin 7 gWater to make 1000 mlMix in the order shown, but before adding the metol to the water, mix in a pinch of the sulfite. This prevents the metol from oxidizing immediately. Be sure each chemical is completely dissolved before adding the next.Developing times vary according to the film you use, and you should experiment with times between about 9 and 18 minutes. Agitate 30 seconds initially, then 10 seconds each minute thereafter.- Le révélateur à grain fin D25Génol ..... 7,5 gSulfite de soude ..... 100 gMétabisulfite ..... 15 gpour 1 litre d'eau à 60°Le 10-100-1000 : (facile à retenir)Génol ..... 10 gSulfite de soude ..... 100 gEau ..... 1 litre (1000 g)Il y avait aussi ces deux formules de bidouillages (sans photoshop) :Affaiblisseur : eau 1000 g, hyposulfite de soude 100 g, Ferrocyanure de potassium 5 g,Préparer juste avant l'emploi, baigner dans la solution jusqu'à l'intensité voulue, lavage complet (1/2 heure). Cet affaiblisseur augmente un peu le contraste.et pour le Renforcement : durcir la gélatine du négatif par un bain de 5 mn dans eau 1000 g, formol 10 cc, Carbonate de soude anhydre 5 g, puis fixer quelques minutes, laver 1/2 heure et blanchir l'image dans 1 partie de renforçateur au bichromate pour 10 parties d'eau,puis développer dans un révélateur au métol-hydroquinone (traitement des papiers) dilué à 1/2, rincer, fixer, laver, sécher ...On peut répéter l'opération.Le renforçateur au bichromate : Bichromate de potasse 80 g, Acide chlorhydrique 60 cc, eau 1000 cc.