https://wiki.henpe.se/ 2026-06-12T02:05:58+00:00 https://wiki.henpe.se/ https://wiki.henpe.se/_media/wiki/favicon.ico text/html 2022-01-22T21:56:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/activator?rev=1642888575&do=diff Activator (print developer) To make print developer more active. For some papers, the use of a activator may cause a lith-like effect. Instructions for use Add 5 gr of Sodium hydroxide per liter of print developer. Notes Note that the developer exhaust more rapidly with the addition of this activator. text/html 2022-01-19T20:59:23+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/c_template?rev=1642625963&do=diff Recipe name This is a single sentence describing the intended use of the formula. Here comes some additional information: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur aliquet sem ex, et finibus purus vehicula nec. Fusce in risus ut lectus suscipit gravida. Aliquam sed libero scelerisque, tempor nulla eget, tincidunt urna. Vivamus tincidunt ullamcorper libero, sit amet malesuada mi pharetra vitae. Donec in turpis semper, posuere nisi vel, ultricies nunc. Mauris et tellus … text/html 2022-01-23T10:12:05+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/cyanotype?rev=1642932725&do=diff Cyanotype To prepare and print cyanotypes. Preparations Prepare stock solutions as described below. (Should be enough to coat approx 10 sheets 8×10“) Part A Ferriammoniumcitrate (green), 6 gr Water (deionized) 25 ml (store in the dark) text/html 2022-01-21T13:40:21+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/d23?rev=1642772421&do=diff Kodak D-23 Semi-compensating film developer. Promotes shadow tonality. Grain and speed characteristics similar to Kodak D-76, without blocking highlights (which may happen with D-76). (ca 1940) Preparations Prepare a working solution as described below text/html 2022-01-22T21:50:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/dehardener?rev=1642888208&do=diff Dehardener To soften the emulsion of prints treated with hardener, for use e.g. before toning Preparations Prepare solution as described below: Print dehardener Water 750 ml Natriumkarbonate (monohydrat) 30.0 gr text/html 2022-05-01T10:17:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/farmers_local?rev=1651400248&do=diff Farmer's Reducer (local bleaching) For local bleaching of prints Stock Solutions Part A Potassium ferricyanide, 1% Part B Sodium thiosulfate (Hypo), 10% Note: As an alternative to B, one can use ordinary fixer at working strength Instructions for use text/html 2022-05-01T10:01:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/farmers_print?rev=1651399280&do=diff Farmer's Reducer (full print bleaching) For bleaching of full prints. Increases contrast and clears highlights Preparations Prepare stock solutions as described below: Part A x1 x2 x4 Potassium Ferricyanide text/html 2022-05-01T10:48:18+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/farmers_r4a?rev=1651402098&do=diff Farmer's Reducer (Kodak R4a) Substractive bleach for overexposed or fogged film. Substractive... Preparations Prepare stock solutions as described below: Part A Water, 300 ml Potassium Ferricyanide, 37.5 gr Water, text/html 2022-01-20T20:28:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/farmers_r4b?rev=1642710495&do=diff Farmer's Reducer (Kodak R4b) Proportional: for overdeveloped film Preparations Prepare stock solutions as described below: Part A Water, 500 ml Potassium Ferricyanide, 7.5 gr Water, to make 1000 ml Part B Water, text/html 2022-01-26T10:02:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/fixers?rev=1643191344&do=diff Fixers This page collects the formulas for a few different (simple) fixers. Preparations Hypo, plain For use as a second fix prior to toning, etc. Water (52°C) 2000 ml Sodiumthiosulfate 480 gr Will fix a print within 30 sec. Solution has a short shelf-life and should be used directly. An acidic stop must be used before fixing, otherwise staining might occur. text/html 2022-01-20T20:19:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/pre_development_bleach?rev=1642709996&do=diff Pre-development bleach To reduce contrast in prints and open-up shadows. This bleach is applied post exposure but pre-development. The bleach primarily affect shadow regions. Preparations Prepare a stock and then working solution as described below: text/html 2022-01-20T11:30:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/raw_chemicals?rev=1642678220&do=diff Raw Chemicals Translations Swedish English Natriumsulfit Sodium Sulfite Natriumbisulfit Sodium Bisulfite, Sodium Hydrogen Sulfite text/html 2022-05-10T18:53:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/stop?rev=1652208821&do=diff Stop bath's Acetic stop For prints and film. Acetic stop, approx 1% Non-hardening acidic stop bath. To mix from acetic acid 24% (common in Swedish grocery stores). Final vol. Acetic Water 1000 ml 40 ml 960 ml 600 ml 25 ml 575 ml text/html 2022-01-20T17:35:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/thornton_two_bath?rev=1642700145&do=diff Barry Thornton’s two bath developer Formula for two bath (divided) development. Yields a compensating effect. Preparations Prepare stock solutions as described below: Part A Water (@ 50 degrC), 750 ml Methol, 6.5 gr text/html 2022-01-26T11:22:19+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.henpe.se/wiki/darkroom/chemistry/formulas/washaid?rev=1643196139&do=diff Wash Aid (HCA) Hypo Clear Agent (HCA) to accelerate the removal of fixer salts and decrease washing times. Preparations Kodak HCA To mix from pre-mixed powder (provided by Kodak) Kodak HCA To prepare working solution from powder. Kodak HCA,