A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z

A-Z OF PHOTOGRAPHIC CHEMICALS

I am grateful to Silverprint for permission to use this list. Silverprint (http://www.silverprint.co.uk) supply chemicals and kits as well as many other hard to get photographic items, well worth a visit.
INCLUDED IN THE A-Z OF CHEMICALS:

1. NAME- we have listed the Chemicals by their most common 'working' name. In some instances this is the proper Chemical Nomenclature, e.g. Ferric Ammonium Citrate - as used in iron blue toners and the Cyanotype process. In other cases it might be a Photographic Designation, e.g. Bromide - the name given by photographers to Potassium Bromide, a developer restrainer. Or, it may be a Trade Name, e.g. Phenidone - the name given by Ilford to 1 Phenyl-3-Pyrazolidone, a soft working developing agent whose properties they discovered.

2. FORMULA - we have included this to make the identification and ordering of chemicals easier.

3. OTHER NAMES/DESIGNATIONS - all the chemicals have been listed along with as many other names and designations as we could find for them.
This is intended to be of help for anyone working with old photographic books and almanacs - many of which use rather out-dated nomenclature. Despite this, most of these publications have considerable application today. All these names have been cross-referenced..

4. COMMON USES - against each chemical we have included some examples of its' usage. Many of the chemicals have a much wider range of applications than those we have listed.

SAFETY - Pay attention to any safety details given. When making up solutions do so in the order given in the formula. Add acid slowly to cold water never the other way round. Label all bottles fully and correctly. Do not use containers used for cooking-ever. Be very careful when using powder as they can affect the lungs and eyes. Always work in a well ventilatedd space. Keep all solutions out of reach of children.

Every effort has been make to ensure accuracy, however I can not be held responsible for errors or omissions. This is a complex area, bear in mind that formula may be the most accurate method of ordering a chemical. I have also found errors in chemical suppliers lists: be careful!

ACACIA- Gum Arabic.
* Ingredient of Gum bichromate process, sizing papers for old processes.
ACETATE OF LEAD - (see: Lead Acetate).
ACETIC ACID - CH3CO2H.
* Glacial 100%, commercial 60%, working strength
3%.
* Stop baths, acidifying: fixers, intensifiers and toners, a post alkali toning rinse bath to remove scum.
* Glacial freezes/ solidifies at 16C; thaw the bottle from the top downwards.
ACID SULPHATE OF SODA - (see: Sodium Bisulphate).
ACID SULPHlTE OF SODA - (see: Sodium Bisulphite).
ADUROL - (see: Chlorohydroquinone).
ALCOHOL - C2H5OH, Diethyl Alcohol, Ethyl Alcohol, Ethanol.
* Developer solvent used to make concentrated developer solutions, hardener, a rapid drying agent for films.
ALUM - (see: Potassium Alum).
ALUM, CHROME - (see: Chrome Alum).
ALUM, IRON - (see: Iron Alum).
ALUM, POTASH - (see: Potassium Alum).
ALUM, POTASSIUM - (see: Potassium Alum).
ALUMINIUM POTASSIUM SULPHATE - (see:
Potassium Alum).
AMIDOL - (NH2) 2C6H3.0H.2HCL, 2,4-Diaminophenol dihydrochloride, Diamidophenol, Dolmi.
* Developing agent - making a normal developer with just the preservative Sodium Sulphite.
AMMONIA - NH40H, Ammonium Hydroxide, Liquid Ammonia, Liquor Ammonia.
* Bleaching bath additive, intensifier additive, retouching dye remover.
AMMONIO CITRATE OF IRON - (see: Ferric Ammonium Citrate).
AMMONIUM ACID FLUORIDE - (see: Ammonium Difluoride).
AMMONIUM BICHROMATE - (see: Ammonium Dichromate).
AMMONIUM BIFLUORIDE - (see: Ammonium Difluoride).
AMMONIUM BROMIDE - NH4Br, Bromide of Ammonia.
* Warm tone developer restrainer - alternative to Potassium Bromide.
AMMONIUM CARBONATE - (NH4)2CO3, Lump Ammonia, Carbonate of Ammonia.
* Developer alkali/ accelerator for warm tones - alternative to Sodium Carbonate.
AMMONIUM CHLORIDE - NH4Cl, Sal Ammoniac, Hydrochloride of Ammonia.
* Rapid fixer additive.
AMMONIUM DICHROMATE - (NH4) 2Cr2O7; Ammonium Bichromate.
* Gelatine sensitiser for Gum Bichromate process.
AMMONIUM DIFLUORIDE - (NH4)F2' Ammonium Acid Fluoride, Ammonium Bifluoride, Ammonium Hydrogen Difluoride, Matt Sal.
* Removal of gelatine emulsion from glass plate negatives.
AMMONIUM FERRIC CITRATE - (see: Ferric Ammonium Citrate).
AMMONIUM FERRIOXALATE - (see: Ammonium Iron 111 Oxalate Trihydrate).
AMMONIUM HYDROGEN DIFLUORIDE - (see: Ammonium Difluoride).
AMMONIUM HYDROXIDE - (see: Ammonia).
AMMONIUM HYPOSULPHITE - (see: Ammonium Thiosulphate).
AMMONIUM IRON ALUM - (see: Iron Alum).
AMMONIUM IRON 111 TRIHYDRATE - (see: Ammonium Iron 111 Oxalate Trihydrate).
AMMONIUM IRON 111 OXALATE TRIHYDRATE (NH4) 3[Fe (C2O4)3].3H20, Ferric Ammonium Oxalate, Ammonium Ferrioxalate, Ammonium Trisoxalatoferrate ill Trihydrate, Ammonium Iron ill Oxalate.
* Light sensitive ingredient in revised Platinumprocess.
AMMONIUM PERSULPHATE - (NH4)2S2 O8.
* A reducer.
AMMONIUM POLYSULPHIDE: (NH 4)2S, Ammonium Sulphide.
* Sulphide toner ingredient - alternative to Sodium Sulphide.
AMMONIUM RHONDATE - (see: Ammonium Thiocyanate).
AMMONIUM SULPHIDE - (see: Ammonium Polysulphide).
AMMONIUM SULPHOCYANIDE - (see: Ammonium Thiocyanate).
AMMONIUM TETRACHLOROPALLADATE (NH4) 2PdCl4 Palladium.
* Palladium and Platinum-Palladium printing ingredient.
AMMONIUM TETRACHLOROPLATINATE (NH4)2PCl4, Platinum.
* Platinum and Platinum-Palladium printing ingredient, toning agent.
AMMONIUM TETRACHLOROPLATINITE - (see: Ammonium Tetrachloroplatinate).
AMMONIUM THIOCYANATE - NH4SCN, Ammonium Rhodanate, Ammonium Sulphocyanide, Sulphocyanide of Ammonia.

* Silver solvent in extra fine grain developers, little used rapid fixing agent, gold toner additive, possible cold tone developer additive.
AMMONIUM THIOSULPHATE - (NH 4)2S2O3, Ammonium Hyposulphite, Hypo.
* Most commonly used rapid fixing agent.
AMMONIUM TRISOXALATOFERRATE 111 TRIHYDRATE - (see: Ammonium Iron 111 Oxalate Trihydrate).
ARGENTUM NITRICUM - (see: Silver Nitrate).
ARROWROOT.
* Starch obtained from tubers of Maronta Arundinacea - sizing vehicle for sensitive salts in some old processes.
ASCORBIC ACID - C6H8O6), Vitamin C.
* Little used developer preservative.
AURIC ACID - (see: Gold Chloride).
AURIC CHLORIDE - (see: Gold Chloride).

BALANCED ALKALI - (see: Kodalk).
BARIUM SULPHIDE - BaS.
* Sulphide toner ingredient - alternative to Sodium Sulphide.
BENZENE - C6H6, Petrol.
* Cleaning agent.
BENZOQUINONE - O:C6H4:0, Quinone.
* A reducer.
BENZOTRIAZOLE - C6H5N3'
* A developer anti-foggant - good for outdated papers, cold tone developer additive. BICARBONATE OF SODA - (see: Sodium Hydrogen Carbonate).
BICHROMATE OF POTASH - (see: Potassium Dichromate).
BLUE COPPERAS - (see: Copper Sulphate).
BLUE VITRIOL - (see: Copper Sulphate).
BORACIC ACID - (see: Boric acid).
BORAX - Na2B407.10H20, Di-Sodium Tetraborate, Sodium Biborate, Sodium Borate.
* Mild alkali/ accelerator for fine grain developers, toner additive.
BORIC ACID - H3BO3, Boracic Acid, Orthoboric Acid.
* Fine grain developer additive, solution buffering agent when used with Borax, acid fixing bath ingredient.
BROMIDE - KBr, Pot Brom, Potassium Bromide.
* Most commonly used developer restrainer antifogging, bleach additive, toner additive.
BROMIDE OF AMMONIA - (see: Ammonium Bromide).
BROMOCRESOL GREEN.
* pH indicator for acid stop baths, e.g. Kodak S8-la. Goes from yellow to green and then blue when the stop bath is exhausted.
BROMOCRESOL PURPLE.
* pH indicator agent for acid stop baths, e.g. Kodak SB-I. Goes from orange to purple when the stop bath is exhausted.

CALGON - Na2(Na4P6O18) Sodium Hexa.
* Water softening agent, sequestering agent.
CALOMEL - (see: Mercuric Chloride).
CARBON TETRACHLORIDE - CCL4.
* Cleaning agent for films.
CARBONATE OF AMMONIA - (see: Ammonium Carbonate).
CARBONATE OF POTASH - (see: Potassium Carbonate).
CARBONATE OF SODA - (see: Sodium Carbonate).
CARBOLIC ACID - C6H5OH, Phenic acid, Phenol. * Disinfectant/ preservative/ fungicide for gelatine sizing - can be used instead of Formalin or Thymol. CATECHOL C6 H4(OH)2 Pyrocatechin, Pyrocatechol, Ortho-Dihydroxybenzine.
* A warm tone developing agent, fine grain developing agent, tanning developing agent.
CAUSTIC POTASH - (see: Potassium Hydroxide).
CAUSTIC SODA - (see: Sodium Hydroxide).
CHLORIDE OF GOLD - (see: Gold Chloride).
CHLOROAURIC ACID - (see: Gold Chloride).
CHLOROHYDROQUINONE - CL6H3(OH)2, Adurol, Chlorquinol, Monochlorohydroquinone.
* Developing agent - warm working equivalent to Hydroquinone.
CHLORQUINOL - (see: Chlorohydroquinone).
CHROME ALUM - K2Cr2(SO4)424H20, Chromic or Chromium Potassium Sulphate, Chromium 111 Potassium Sulphate.
* Hardening agent for some stop baths and fixers.
CHROMIC or CHROMIUM 111 POTASSIUM SULPHATE - (see: Chrome Alum).
CITRIC ACID - H6H8O7.H20.
* Occasional additive for physical developers and intensifiers, stop baths, buffering agent.
COMMON SALT - (see: Sodium Chloride).
COPPER CHLORIDE - CuCl, Cupric Chloride.
* Bleacher ingredient.
COPPER SULPHATE - CuSO4 Cupric Sulphate, Blue Vitriol, Blue Copperas.
* Bleacher ingredient, intensifier ingredient, toner agent.
CUPRIC CHLORIDE - (see: Copper Chloride).
CUPRIC SULPHATE - (see: Copper Chloride).

DIAMDOPHENOL - (see: Amidol).
DIAMENOBENZENE, 1.2 - (see: Orthophenylenediamine).
DIAMENOPHENOL DIHYDROCHLORIDE - (see: Amidol).
DIETHYL ALCOHOL - (see: Alcohol).
DIETHYL PARAPHENYLENE-DIAMINE SULPHATE - (see: Genochrome).
DIPOTASSIUM DISULPHlTE - (see: Potassium Metabisulphite).
DISODIUM TETRABORATE - (see: Borax).
DISODIUM DISULPHlTE - (see: Sodium Metabisulphite).
DISODIUM EDTA - (see: EDTA).
DOLMI - (see: Amidol).

EDTA - (HOOCCH2)NCH2CH2N(CH2COONa)2, Disodium EDTA, Ethylene Diamine Tetra Acetic Acid, Sequestrine, Sequestric Acid.
* Bleacher ingredient, clearing bath for Platinumprocess, sequestering agent - can be used to replace Calgon. Not to be confused with other versions of EDTA as used in colour chemistry.
ELON - (see: Metol).
EPSOM SALTS - (see: Magnesium Sulphate).
ETHANOL - (see: Alcohol).
ETHER - (C2H5)2O, Sulphuric Ether.
* Removal of grease marks.
ETHYL ALCOHOL - (see: Alcohol).
ETHYLENE DIAMINE TETRA ACETIC ACID - (see: EDTA).

FERRIC AMMONIUM CITRATE 2FeC6H5O7( NH4)3C6H5O7,. Ammonio Citrate of Iron, Iron Ammonium Citrate.
* Iron blue toner ingredient, Cyanotype sensitiser ingredient.
FERRIC AMMONIUM SULPHATE - (see: Iron Alum).
FERRIC AMMONIUM OXALATE 2FE2(C20433(NH4)2C2046H20, Ferric Oxalate.
* Light sensitive salt in traditional Platinumprocess and other old processes.
FERRIC CHLORIDE - FeO3, Ferric Chloride, Iron Perchloride, Perchloride of Iron.
* Ingredient of Belitzkis' reducer.
FERRIC OXALATE - (see: Ferric Ammonium Oxalate).
FERRI CYANIDE - (see: Potassium Ferricyanide).
FERRI CYANIDE OF POTASH - (see: Potassium Ferricyanide).
FERRY - (see: Potassium Ferricyanide).
FORMALDEHYDE - (see: Formalin).
FORMALIN - HCHO, Formaldehyde.
* Formaldehyde in solution, a hardening agent, disinfectant/ preservative/ fungicide sometimes added to gelatine when sizing papers.

GALLIC ACID - C6;H2(OH)3.COOH.H20,
3,4,5- Trihydroxybenzoic acid.
* Fox Talbot's original developer.
GELATINE.
* Highly refined animal by-product used in emulsion making, sizing of papers for old processes.
GENOCHROME - NH2.C6 H4.N(C2H5)2H2SO4 Diethyl Paraphenylenediamine Sulphate.
* Developing agent.
GLACIAL ACETIC ACID - (see: Acetic Acid).
GLAUBERS SALT - (see: Sodium Sulphate).
GLYCERINE - C3H5(OH)3 Glycerol.
* Negative scratch filler, emulsion and FB paper softening/ flattening agent, little used developer restrainer.
GLYCEROL - (see: Glycerine).
GLCIN - C6H40H.NH.CH2COOH, Kodurol, Monosol, Para-Hydroxyphenylamino acetic acid, Para-Hydroxyphenyl Glycine.
* Slow fine grain developing agent, warm tone developing agent.
GLCINE - H2NCH2CO2H.
* Not to be confused with Glycin.
GOLD CHLORIDE - (see: Hydrogen Tetrachloroaurate and Sodium Tetrachloroaurate).

HYDROCHLORIC ACID- HCl, Muriatic acid, Spirits of Salt.
* Vessel cleaner, intensifier ingredient, toner ingredient.
HYDROGEN PEROXIDE - H202.
* A stain remover, hypo eliminator ingredient.
HYDROGEN TETRACHLOROAURATE HAuCl43H20, Auric Acid, Auric Chloride, Chloroauric Acid, Gold Chloride.
* Gold toning agent.
HYDROKINONE - (see: Hydroquinone).
HYDROQUINIONE - C6H4(OH)2 Para Hydrokinone, Quinol.
* High contrast developing agent..
HYPO - (see: Ammonium Thiosulphate and Sodium Thiosulphate).
HYPOSULPHITE OF SODA - (see: Sodium Thiosulphate ).

IODIDE OF POTASH- (see: Potassium Iodide).
IODINE - 12.
* Reducer ingredient.
IRON ALUM - Fe2(NH4)(SO4)4H20, Ammonium Ferric Sulphate, Ammonium Iron Alum, Ferric Alum, Iron 111 Sulphate.
* Iron blue toner ingredient.
IRON CHLORIDE - (see: Ferric Chloride).
IRON PERCHLORIDE - (see: Ferric Chloride).

ISO-PROPYL ALCOHOL - CH3CH2CH2OH, Isopropanol.
* Cleaning agent for prints.
ISOPROPANOL - (see: Isopropyl Alcohol).

KODALK - NaBO2 Kodak Balanced Alkali, Sodium Meteorite.
* Developer alkali/ accelerator.
KODUROL - (see: Glycin).

-LACTIC ACID C3 O3.
* Amidol developer preservative.
LEAD ACETATE - (CH3CO2)2Pb, Acetate of Lead, Sugar of Lead.
* Toning ingredient.
liQUID AMMONIA - (see: Ammonia).
liQUOR AMMONIA - (see: Ammonia).
liVER OF SULPHUR - (see: Potassium Sulphide).
LUMP AMMONIA - (see: Ammonium Carbonate).
LUNAR CAUSTIC - (see: Silver Nitrate).

MAGNESIUM SULPHATE - MgSO4 Epsom Salts. * Rapid drying agent.
MATT SALZ - (see: Ammonium Difluoride).
MERCURIC IODIDE - HgI2.
* Intensifier ingredient.
MERCURIC CHLORIDE - HgO2 Mercury Chloride, Calomel.
* Mercury intensifier ingredient.
MERCURY CHLORIDE (see: Mercuric Chloride).
METABISULPHITE - (see: Potassium Metabisulphite and Sodium Metabisulphite).
METABISULPHITE OF POTASH - (see: Potassium Metabisulphite).
MERITOL - C6H4(NH2). H4(OH)2 Paraphenylenediamine Pyrocatecholate.
* Combination of Paraphenylenediamine and Pyrocatechol developing agents, fine grain developing agent.
METHYLENE BLUE.
* Dye toner, wash efficiency test indicator.
METOL - H4(OH)(NH.CH3),1/2H2SO4 MonoSulphate, Elon, Monazol, Monol, Planetol, Rhodol, Scalol.
* Soft working developing agent.
MONOCHLOROHYDROQUINONE - (see: Chlorohydroquinone ).
METOQUINONE - Quinomet.
* Developing agent - combination of Metol and Hydroquinone.
METSO - (see: Sodium Metasilicate).
MONAZOL - (see: Metol).
MONOL - (see: Metol).
MONO-METHYL-PARAMINOPHENOL SULPHATE - (see: Metol).
MONOSOL - (see: Glycin).
MURIATIC AGD - (see: Hydrochloric acid).

NITRATE OF SILVER - (see: Silver Nitrate).
NITROBENZIMIDAZOLE.
* Organic restrainer - similar to Benzotriazole.

POTASSIUM METABISULPHITE - K2S2O5' Dipotassium Disulphite, Metabisulphite of Potash, Potassium Bisulphite.
* Developer preservative and buffering agent, stop bath and fixer acidifier, clearing bath ingredient to remove certain stains.
POTASSIUM OXALATE - KO2CCO2KH20.
* Developing agent in traditional Platinum-Palladium process.
POTASSIUM PERMANGANATE - KMnO4 Permanganate of Potash.
* Stain remover, bleach, disinfectant, removal of smell of Hydrogen Sulphide gas associated with Sulphide toning, Hypo test ingredient.
POTASSIUM PERSULPHATE - (see: Ammonium Persulphate).
POTASSIUM SODIUM TARTRATE (OH).CH(OH).COONa.4H20, Rochelle salts.
* Toning ingredient.
POTASSIUM SULPHIDE - KS, Liver of Sulphur.
* Silver precipitator/recoverer, toner ingredient.
POTASSIUM THIOCYANATE - KCNS.
* Extra fine grain developer silver solvent, little used rapid fixing agent, toner ingredient, possible cold tone developer additive.
PYRO- (see: Pyrogallol).
PYROCATECHIN - (see: Catechol).
PYROCATECHOL - (See: Catechol).
PYROGALLIC ACID - (see: Pyrogallol).
PYROGALLOL - C6H3(OH)3, Pyro, Pyrogallic Acid, 1-2-3-Trihydroxybenzoic Acid.
* Developing agent, tanning developing agent.

QUINOL - (see: Hydroquinone).
QUINOMET - (see: Metoquinone).
QUINONE - (see: Benzoquinone).

RED PRUSSIATE OF POTASH- (see: Potassium Ferricyanide).
ROCHELLE SALTS - (see: Potassium Sodium Tartrate).
RHOOOL - (see: Metol).

SAL AMMONIAC - (see: Ammonium Chloride).
SALT - (see: Sodium Chloride).
SCALOL - (see: Metol).
SCHLIPPES SALTS - (see: Sodium Sulphantimoniate).
SELENIUM - Se.
* Toner ingredient.
SEQUESTRIC ACID - (EDTA).
SEQUESTRINE - (see: EDTA).
SILICA GEL.
* A hygroscopic substance used to keep equipment and materials dry - can be de-hydrated for re-use by leaving in a warm oven.
SILVER BROMIDE - AgBr.
* Emulsion making.
SILVER CHLORIDE - AgCl.
* Emulsion making.
SILVER IODIDE - AgI.
* Emulsion making.
SILVER NITRATE - AgNO3 Argentum Nitricum, Lunar Caustic, Nitrate of Silver.
* Emulsion making, physical developers, intensifiers, old Silver processes, Printing Out Paper ingredient. SODA - (see: Sodium Carbonate).
SODIUM AMMONIUM PHOSPHATE (NH4)HPO4.4H20.
* Iron toner ingredient.
SODIUM BIBORATE - (see: Borax).
SODIUM BICARBONATE - (see: Sodium Hydrogen Carbonate).
SODIUM BISULPHATE - NaHSO4 Acid Sulphate of Soda.
* Toner ingredient.
SODIUM BISULPHITE - NaHSO3 Acid Sulphite of Soda, Sodium Bisulphite Lye.
* Same use as Potassium Metabisulphite.
SODIUM BORATE - (see: Borax).
SODIUM BROMIDE - NaBr.
* Developer restrainer / antifoggant - alternative to Potassium Bromide.
SODIUM CARBONATE - Na2CO3' Soda, Carbonate of Soda, Washing Soda.
* Developer alkali/ accelerator, bleach and toning bath additive, post fixation clearing bath.
SODIUM CHLORIDE - NaCl, Common Salt.
* Mercury intensifier ingredient, copper bleach ingredient, Salt print process ingredient.
SODIUM BORATE - (see: Borax).
SODIUM DISULPHITE, DI - (see: Sodium Metabisulphite).
SODIUM HYDROGEN CARBONATE - NaHCO3, Bicarbonate of Soda,
* Developer alkali/ accelerator.
SODIUM HYDROXIDE - NaOH, Caustic Soda.
* Strong developer accelerator, toner ingredient.
SODIUM HYPOSULPHITE - (see: Sodium Thiosulphate).
* Old incorrect term for Hypo, i.e. fixer.
SODIUM METABISULPHITE - Na2S205, Disodium Disulphite, Sodium Bisulphite.
* Same uses as Potassium Metabisulphite.
SODIUM METABORATE - (see: Kodalk).
SODIUM METASILICATE - Na2SiO3.5H20, Metso. * Strong developer accelerator - sometimes used instead of the caustic alkalis to reduce emulsion swelling.
SODIUM PHOSPHATE - Na3PO4.12H2O, Sodium Phosphate Tri Basic, Tri Sodium Phosphate.
* Developer alkali/ accelerator.
SODIUM PHOSPHATE TRI BASIC - (see: Sodium Phosphate).
SODIUM SELENITE - Na2SeO3
* Toner ingredient - more soluble and safer than Selenium powder.
SODIUM SULPHANTIMONIATE - Na3SbS4.9H20, Schlippes Salts, Sodium Thioantimoniate.
* Toning bath ingredient.
SODIUM SULPHATE - Na2Se3 Glaubers Salts.
* Anti-swelling agent for tropical developers.
SODIUM SULPHIDE - Na2S, Sepia Toner.
* Sepia toner ingredient, silver recovering agent.
SODIUM SULPHITE - Na2SO3, Sulphite of Soda. * Developer preservative, mild silver solvent in fine grain developers, post fixation clearing bath.
SODIUM TETRABORATE - (see: Borax).
SODIUM TETRACHLOROAURATE NaAuCl43H2O, Auric acid, Auric Chloride, Chloroauric Acid, Gold Chloride.
* Gold toning agent.
SODIUM THIOANTIMONIATE - (see: Sodium Sulphantimoniate).
SODIUM THIOSULPHATE - Na2S2O3.5H2O, Hypo, Hyposulphite of Soda, Sodium Hyposulphite.
* Standard - universal - fixing agent.
SODIUM THIOCYANATE - NaSCN.
* As for Potassium Thiocyanate.
STANNOUS CHLORIDE - SnCL2, Tin.
* Toning ingredient.
SULPHURIC ACIO H2SO4 Oil of Vitriol.
* Cleaning vessels, toning ingredient, bleach bath ingredient.
SULPHITE OF SODA - (see: Sodium Sulphite).

TARTARIC ACID- HO2CCH(OH)CH(OH)CO2H. * Van Dyke - Brown Print ingredient.
THIOCARBAMIDE - H2NCSNH2, Thiourea.
* Toning agent odourless alternative to Sodium Sulphide.
THIOUREA - (see: Thiocarbamide).
THYMOL - (CH3)2CH. C6H3(CH3).OH,
* A disinfectant/ antiseptic/ fungicide - alternative to Formalin or Carbolic acid when gelatine sizing papers.
TRIHYDROXYBENZENE ,1-2-3 - (see: Pyrogallol).
TRIHYDROXYBENZOIC ACID, 3,4,5 - (see: Gallic Acid).
TRISODIUM PHOSPHATE - (see: Sodium Phosphate).

URANIUM NITRATE UO2(NO3).6H2O, Uranyl Nitrate.
* Intensifier ingredient, toner ingredient. URANYL NITRATE - (see: Uranium Nitrate).

VANADIUM CHLORIDE VCl3' * Green toner ingredient.
VITAMIN C - (see: Ascorbic acid).

HOME GALLERIES INFORMATION LINKS