Photographic Raw Chemicals List for Amateur Use
(C) 2018 b-wtechnik.pp7.uk
The chemicals from the suppliers listed below have been checked to meet
the specific requirements
stated for iron and heavy metals.
Abbreviations:
PD=paper developer FD=film developer S=stop bath
F=fixer
W=water conditioning M=miscellaneous
Alkalies
Name | Usage | Fe ppm | Heavy metals ppm | Other impurities | Source |
sodium carbonate anh. | PD | < 20 | < 10 total | copper < 2ppm | Mistralni, Fast-Chem, bio-aquatek (Tata)* |
sodium metaborate 4H2O | FD | < 20 | < 10 total | copper < 2ppm | Fast-Chem |
sodium phosphate | FD | < 20 | < 20 total | copper < 2ppm | minerals-water |
Sodium tetraborate 8H2O (Borax) | FD | < 30 | < 20 total | copper < 2ppm | bio-aquatek, Mistralni |
* Tata sodium carbonate has < 7ppm iron
Preservers
Name | Usage | Fe ppm | Heavy metals ppm | Other impurities | Source |
Sodium sulphite anh. | FD,PD,F | < 50 | < 20 total | copper < 2ppm | Mistralni |
Sodium metabisulphite | F,S | Mistralni, Fast-Chem |
Miscellaneous
Name | Usage | Fe ppm | Heavy metals ppm | Other impurities | Source |
EDTA, disodium | W | < 5 | < 30 total | copper < 2ppm | apcpure, minerals-water |
Sodium hydroxide | W | tradechemicals | |||
Sodium tripolyphosphate STPP | W | copper < 2ppm | Mistralni | ||
Ammonium chloride | F | minerals-water | |||
Sodium thiosulphate 5H2O | F | Mistralni | |||
Citric acid | S | minerals-water | |||
Trisodium citrate 2H2O | S | konradchemicals | |||
Potassium bromide | FD | < 5 | < 20 | copper < 2ppm | apc-pure |
Sodium chloride | FD | < 5 | < 20 | copper < 2ppm | Fast-Chem |
Boric acid | FD | < 5 | < 30 | copper < 2ppm | Mistralni, tradechemicals |
disodium phosphate | W,F | sourcechemicals | |||
monopotassium dihydrogen phosphate | W,F | minerals-water |
Developing Agents
Name | Usage | Fe ppm | Heavy metals ppm | Other impurities | Source |
Metol | FD,PD | processuk.net | |||
Hydroquinone | F,S | processuk.net | |||
Phenidone | FD | Silverprint, wetplatesupplies |
Scales: 50g 0.001g resolution 500g, 0.1g resolution
Bag Filters: 1 micron polypropylene felt 4.3" x 8" from
http://gapswater.co.uk/acatalog/ringlock_bag_filters.html
Notes:
1. Where no impurity levels are specified, assume normal technical grade
chemicals. Only developers are
potentially susceptible to iron, heavy metals and iodine.
2. All chemicals are anhydrous unless shown as hydrated.
3. Most sources are found on ebay.co.uk - use the advanced search to locate
supplier.
4. Water impurity levels can be checked via your local supplier. For
photographic purposes, apart from
water hardness, they are very low. For example the regulatory limit for iron is
0.2 ppm and for heavy
metals is around 0.090 ppm. In the London area, iron is present at around 0.003
ppm and total heavy
metals is less than 0.005 ppm, total hardness is 275 ppm
5. Impurity source data based on "Photographic Processing Chemistry"
L. F. A. Mason,
Focal Press, 1962, chapter 2.