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#1
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Turn D-76R to D-76D?
I have a few packages of D-76R (replenisher) not being used. Look at the
formula difference of D-76D and D-76R, I thought the best use could be to turn D-76R into D-76D so I can at least to use it up for normal developing. D-76D formula: Water, at 125F or 52C 750.0 ml Metol 2.0 grams Hydroquinone 5.0 grams Sodium Sulfite anhydrous 100.0 grams Borax, crystaline 8.0 grams Borax, acid 8 grams Water to make 1.0 liter D-76R formula: Water, at 125F or 52C 750.0 ml Metol 3.0 grams Hydroquinone 7.5 grams Sodium Sulfite anhydrous 100.0 grams Borax, crystaline 20.0 grams Water to make 1.0 liter I think about using following steps (here is for 1 liter package, though I have 1 gallon package so need to do some calculation): Water, at 125F or 52C 1000 ml Metol add 0 grams Hydroquinone add 0 grams Sodium Sulfite anhydrous add 50 grams Borax, crystaline add 0 grams Borax, acid add 12 grams Water to make 1.5 liter The problem is there is 20 gram of Borax, crystaline in the final mixture. Will this pose a danger to the result? If there is too much Borax, crystaline, what will be the impact? Also, can I cut Borax acid to compensate for the abundance of Borax crystaline? What is the purpose and the difference of two Borax for D- 76D? By the way, any better use for those D-76 Replenishers? Thanks, - philip |
#2
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Turn D-76R to D-76D?
Philip Wang wrote: I have a few packages of D-76R (replenisher) not being used. Look at the formula difference of D-76D and D-76R, I thought the best use could be to turn D-76R into D-76D so I can at least to use it up for normal developing. D-76D formula: Water, at 125F or 52C 750.0 ml Metol 2.0 grams Hydroquinone 5.0 grams Sodium Sulfite anhydrous 100.0 grams Borax, crystaline 8.0 grams Borax, acid 8 grams Water to make 1.0 liter D-76R formula: Water, at 125F or 52C 750.0 ml Metol 3.0 grams Hydroquinone 7.5 grams Sodium Sulfite anhydrous 100.0 grams Borax, crystaline 20.0 grams Water to make 1.0 liter I think about using following steps (here is for 1 liter package, though I have 1 gallon package so need to do some calculation): Water, at 125F or 52C 1000 ml Metol add 0 grams Hydroquinone add 0 grams Sodium Sulfite anhydrous add 50 grams Borax, crystaline add 0 grams Borax, acid add 12 grams Water to make 1.5 liter The problem is there is 20 gram of Borax, crystaline in the final mixture. Will this pose a danger to the result? If there is too much Borax, crystaline, what will be the impact? Also, can I cut Borax acid to compensate for the abundance of Borax crystaline? What is the purpose and the difference of two Borax for D- 76D? By the way, any better use for those D-76 Replenishers? Thanks, - philip Years ago, unavailable light photographers were using D-76R as is to push Super-XX. There was no Tri-X yet. The replenisher has extra alkali because the products of development reduce the pH. The boric acid in the developer increases the buffer capacity and stabilizes pH. The original D-76 had only 2 grams of borax, and pH would increase over time even without use. If anything, make borax and boric acid equal, assuming it will all dissolve. Don't lose hair over it. A test roll will tell. You will probably want to dilute it anyway. Hardly anyone uses D-76 full strength these days. You'll just have to experiment with developing times. |
#3
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Turn D-76R to D-76D?
Thanks. D-76R can also be made into a fine paper developer by converting
it into D-72. Just not sure what the extra Borax will be doing during the paper developement. Will they have any harm? D-72 formula has no Borax. With Sod. Carbonate and Pot. Bromide added. Metol 3 gram Sod. sulfite 45 gram Hydroquinone 12 gram Borax none Sod. Carbonate 80 gram Pot. Bromide 2 gram Need some math to get the mix right. - philip [posted and mailed] Patrick Gainer wrote in : Years ago, unavailable light photographers were using D-76R as is to push Super-XX. There was no Tri-X yet. The replenisher has extra alkali because the products of development reduce the pH. The boric acid in the developer increases the buffer capacity and stabilizes pH. The original D-76 had only 2 grams of borax, and pH would increase over time even without use. If anything, make borax and boric acid equal, assuming it will all dissolve. Don't lose hair over it. A test roll will tell. You will probably want to dilute it anyway. Hardly anyone uses D-76 full strength these days. You'll just have to experiment with developing times. |
#4
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Turn D-76R to D-76D?
Philip Wang wrote in message . 136...
I have a few packages of D-76R (replenisher) not being used. Look at the formula difference of D-76D and D-76R, I thought the best use could be to turn D-76R into D-76D so I can at least to use it up for normal developing. D-76D formula: Water, at 125F or 52C 750.0 ml Metol 2.0 grams Hydroquinone 5.0 grams Sodium Sulfite anhydrous 100.0 grams Borax, crystaline 8.0 grams Borax, acid 8 grams Water to make 1.0 liter D-76R formula: Water, at 125F or 52C 750.0 ml Metol 3.0 grams Hydroquinone 7.5 grams Sodium Sulfite anhydrous 100.0 grams Borax, crystaline 20.0 grams Water to make 1.0 liter I think about using following steps (here is for 1 liter package, though I have 1 gallon package so need to do some calculation): Water, at 125F or 52C 1000 ml Metol add 0 grams Hydroquinone add 0 grams Sodium Sulfite anhydrous add 50 grams Borax, crystaline add 0 grams Borax, acid add 12 grams Water to make 1.5 liter The problem is there is 20 gram of Borax, crystaline in the final mixture. Will this pose a danger to the result? If there is too much Borax, crystaline, what will be the impact? Also, can I cut Borax acid to compensate for the abundance of Borax crystaline? No. What is the purpose and the difference of two Borax for D- 76D? By the way, any better use for those D-76 Replenishers? If you're not going to use them as replenishers for stock D-76, throw them away. Thanks, - philip |
#5
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Turn D-76R to D-76D?
"Borax, acid" in the formula should be changed to "Boric Acid Crystals".
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#7
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Turn D-76R to D-76D?
Philip Wang wrote
I have a few packages of D-76R (replenisher) not being used. Look at the formula difference of D-76D and D-76R, I thought the best use could be to turn D-76R into D-76D so I can at least to use it up for normal developing. Use that replenisher just as you would D-76. You will likely find a 1:2 or 1:3 dilution a more near match for your D-76 1:1 dilution. Dan |
#8
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Turn D-76R to D-76D?
Philip Wang wrote in message 36...
To me "throw them away" is the worst idea, from protecting environment point of view, and make use of thing that is still useful. Anyway thanks for your answer though it may benefit if there are some supporting details, for example, "throw them away" is actually cost less, or even is great for the environment, etc. The amount of effort necessary to do anything useful with the replensher exceeds its cash value. Dispose of it properly or use it as intended. |
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