Yard Post Card
110 year old camera, 51 year old film, 16 month old home made developer.
Post Card format 3 1/4 x 5 1/2 inch negative. The picture is not important, this is a test of exposure and development of this old film from 1971. Kodak RAR 2490 rapid action film box speed about ISO 64. Shot at ISO 6 from Ansco 1912 #3A folding camera. Developed in 18 month old Kalogen developer about 1:90 dilution, stand developed for 60 minutes. Water stop, fixed with Ilford Rapid 1:4 for 4 minutes. All at about 70 degrees F.
Kalogen was originally a replacement for Rodinal in/during/after the first world war when Rodinal was not available in the US/UK. Instead of para-aminophenol as the primary developer, it is essentially synthesized from the metol in the formula. (I'm finding it to be more active than Rodinal in comparable dilutions)
Distilled water (50°C) .................. 750 ml
Metol ....................................... 13.5 g
Sodium sulfite (anhy) ................... 180 g
Hydroquinone ............................. 53.0 g
Sodium hydroxide ........................ 35.0 g
Potassium bromide ....................... 5.0 g
Benzotriazole, 1% ........................ 80.0 ml
Distilled water to make ................. 1.0 l
Obvious A LOT of chemistry but that is because it is a concentration. Rodinal is essentially para-aminophenol, Sodium sulfite and sodium hydroxide. So this is only slightly more complex.
Weigh out the Metol and sulfite. Dissolve a pinch of the sulfite in the water before adding the Metol. Dissolve the other ingredients in the order given. A precipitate will form upon the addition of the hydroquinone which will dissolve upon the addition of the sodium hydroxide.
Transfer the solution to a 1 liter glass bottle, stopper and allow it to stand for 2 to 3 days. A small amount of impurities will precipitate out and the solution will become lighter in color. Filter the solution and transfer it to several small (2 to 4 ounce) glass bottles and label. When prepared correctly the solution will be a clear pinkish tan color. (My first batch is slightly yellow clear and there is a mild deposit on the bottom. I shake it before I use it.)
After 18 months mine is still a bright straw yellow color.
When stored in nearly full and tightly capped small bottles, the stock solution will keep for months at room temperature. Should any crystals form due to storage at low temperature, they may be redissolved by warming and shaking the bottle.
Yard Post Card
110 year old camera, 51 year old film, 16 month old home made developer.
Post Card format 3 1/4 x 5 1/2 inch negative. The picture is not important, this is a test of exposure and development of this old film from 1971. Kodak RAR 2490 rapid action film box speed about ISO 64. Shot at ISO 6 from Ansco 1912 #3A folding camera. Developed in 18 month old Kalogen developer about 1:90 dilution, stand developed for 60 minutes. Water stop, fixed with Ilford Rapid 1:4 for 4 minutes. All at about 70 degrees F.
Kalogen was originally a replacement for Rodinal in/during/after the first world war when Rodinal was not available in the US/UK. Instead of para-aminophenol as the primary developer, it is essentially synthesized from the metol in the formula. (I'm finding it to be more active than Rodinal in comparable dilutions)
Distilled water (50°C) .................. 750 ml
Metol ....................................... 13.5 g
Sodium sulfite (anhy) ................... 180 g
Hydroquinone ............................. 53.0 g
Sodium hydroxide ........................ 35.0 g
Potassium bromide ....................... 5.0 g
Benzotriazole, 1% ........................ 80.0 ml
Distilled water to make ................. 1.0 l
Obvious A LOT of chemistry but that is because it is a concentration. Rodinal is essentially para-aminophenol, Sodium sulfite and sodium hydroxide. So this is only slightly more complex.
Weigh out the Metol and sulfite. Dissolve a pinch of the sulfite in the water before adding the Metol. Dissolve the other ingredients in the order given. A precipitate will form upon the addition of the hydroquinone which will dissolve upon the addition of the sodium hydroxide.
Transfer the solution to a 1 liter glass bottle, stopper and allow it to stand for 2 to 3 days. A small amount of impurities will precipitate out and the solution will become lighter in color. Filter the solution and transfer it to several small (2 to 4 ounce) glass bottles and label. When prepared correctly the solution will be a clear pinkish tan color. (My first batch is slightly yellow clear and there is a mild deposit on the bottom. I shake it before I use it.)
After 18 months mine is still a bright straw yellow color.
When stored in nearly full and tightly capped small bottles, the stock solution will keep for months at room temperature. Should any crystals form due to storage at low temperature, they may be redissolved by warming and shaking the bottle.