. . …1837 Daguerre was able to fix the image permanently by using a solution of table salt to dissolve the unexposed silver iodide. . . . . . . . . . . 8 gCold Distilled Water to make . 1 litreWater to make . . . . . .
. . . . . .
. . . . . . . . .
. . . . . . .
. . . . . 1 litrethe ammonium thiocyanate can be omitted, but is said to give better blacks. . . . . . . . . . . . .
. . . . 1 litreSodium Hydroxide . . .
. inks. 7 gGlycin . . .
. . .
.
. . F.) . . . . . . . . . . . . . . . . . If in doubt, try Kodak F-24 non-hardening fixing bath or plain hypo (sodium thiosulphate) with sodium bisulphite.
. . . . 250 ml Prints should be developed a little lighter than usual for this toner. . . Talbot used smooth writing paper washed in a weak solution of common salt, dried, then coated with a solution of silver nitrate, resulting in light-sensitive silver chloride. . . . . Develop each strip for a different time. . . . .
500 mlSodium Metaborate . . . . . The other solutions will keep in brown bottles, away from light. . . . . . . . . . .
. . . . The colour of the pigment in the coating will also affect exposure time: blue and green requiring less time than red or yellow.the print in a bath of tepid water. . . . Add amidol and citric acid after solution has cooled.Water (125º F) . . . . . .
to 4-lb., it is felt that the publication of a number of formulae in which this new developing agent is used in combination with hydroquinone will be useful to those workers who wish to compound their own developers".Distilled Water (125 degrees F) . . . . . . 50 gEDTA (optional) .
. . . . . . .
. . . . . . . .
. Once exposed, the paper was developed up with silver nitrate (Herschel first used gold chloride), washed, and fixed in hypo (another of Herschel's many innovations). Wash thoroughly until all the yellow has been cleared. . . .
. . . 10 gPyrogallol . . . . .
. . 1 litreWater (125 deg. . . . . . 36.0 gPotassium Bromide . .
Place the print face up on a paper towel to blot water off the back, then face up on a smooth waterproof surface. . . . . . . . . . . . . . . . .
. . .
. . Dilute 1:3 or 1:4 for normal use.
. . . .
. . . . . . . . . . . . . . . . 24.5 gCitric acid . . . Talbot refined the process, and Sir John Herschel suggested sodium thiosulphate (hypo) as a fixing agent. . . . . When in doubt about what time to start with, do what I do start with 9 minutes for slow ï¬lms, 12 minutes for medium speed ï¬lms, and 15 minutes for fast ï¬lms. . . . 1.8 gSodium tetraphosphate . MTC Photography. . .
. . .
. 750 mlPotassium Bromide . . . . The citric acid is to reduce oxidation and prevent stains.Potassium ferricyanide . . . . . .
. . . . . . . . . . . . . . . 75 gDistilled water to make - - - - - - - - - - - - - 100 mlTo make a standard working solution, mix 1 part A with 1 part B with 100 ml water. .
. . . . 750 mlSodium Chloride (salt) . . . . . . . . .
. . Use as soon as possible. . . . Both solutions must be cool.Cold water . . . With B/W film densities build up proportionately during development, so the exposure is usually altered by shutter speed with a corresponding cut in developing time.Most of the MQ variations of D76 are published widely, but less is known about the PQ variants of Ilford's equivalent developer ID-11Although J.D. . 2 gWater to make . . . Pre-humidifying the paper will give a cooler purple/brown. . . . . . . 100 gWater to make . .
. . . To choose a starting time, use this rough rule of thumb: For ï¬lms rated between ISO 100 and ISO 320, use a time in the middle of the range. 5 gWater to make . . . . . . . . . . . . . . . . . . . . . . . . . .
.
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.
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. . . . 4 gCold Water to make . . . 0.5 gCold Water to make . . . . . . . . . . . These are strong alkaline compounds that are available today as potassium or ammonium dichromate (bichromate is the older and more common term).
. . . . . .
. . . . . . . . . . . . . . .
. . . . . . . . . Solution B and add water to make 1 litre. . distilled water, then top up with water to make 500ml.
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. . . . . .
. . . . . .
. . . . . . . 1 litreUse full strength. . . . . . . In 1842 Sir John Herschel invented the chryso-type process, using a strong solution of ferric ammonium citrate as a light-sensitive coating on paper. . . . . . .
. . . . . . . . 3 gBorax . . .
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