Don't claim that the items "can't" be shipped
I add 13 gms of pottasium bromideIt is very easy to make paper developer. You need only metol, sodium sulphite, hydroquinone, sodium carbonate. and potassium bromide. Here is one of many similar formulas:
Dupont Developer 53-D
A general-purpose developer reproducing neutral black tones on contact and enlarging papers; it may also be used for tray development of sheet films and plates. This formula is similar to, but not identical with, Kodak Developer D-72.
Stock Solution
Water .................... 16 ounces (500cc)
Metol ..................... 45 grains (3.0 g)
sodium sulfite, anhydrous .................... 1.5 ounces ( 45 g)
hydroquinone .......................... 175 grains (12 g)
sodium carbonate, anhydrous .............. 2.25 ounces (67.5g)
potassium bromide ................. 27 grains (1.9 grams)
add cold water to make ................... 32 ounces (1 L)
Dissolve chemicals in the order given.
For paper - dilute one part of stock solution with two parts of water. Develop projection paper for 1.5 to 2.5 minutes at 68F (20C).
55D is interesting because it is unique and not a copy of a Kodak formula as were most Defender developers. It is less active than Dektol but more active than Selectol or other "warm tone" developers. It Should work for any paper.
Defender used to recommend adding lots of bromide to it to warm the results, however, the formula in the Darkroom Cookbook gives the maximum, not the range. I've found this book gets it slightly wrong just a little too often.
From a Defender publication:
Defender 55D
Stock Solution
Water (125F or 52C) 500.0 ml
Metol 2.5 grams
Sodium Sulfite, dessicated 37.5 grams
Hydroquinone 10.0 grams
Sodium Carbonate, anhydrous 37.5 grams (mono 45g)
Potassium Bromide 4 to 13 grams
Water to make 1.0 liter
Defender 54-D
Metol 2.7g
Sodium sulfite (anhy) 40.2 g
Hydroquinone 10.5g
Sodium carbonate (anhy) 75g (mono 90g)
KBr 0.8g
Water to 1 litre
Also look here:
I've read that Richard J Henry and David Vestal both diluted Dektol/D-72 1+1 rather than the usual 1+2 dilution.
A dark amber solution can develop a print but my experience is the print values will not be optimum.
It probably just shortens development time.
In the old days D-72 had a full range of dilutions for different materials. Moot, since all those materials are gone.
At this time LPL 1gal packaged powder is not available except at Freestyle where its doubled in price. Bummer as its my favorite developer. LPL has a long range. The tonal shifts may be slight but are welcome.
Working Solution Color Change:
I recently reused LPL developer which had been worked for two sessions, (9) 8x10s developed in 1l. Bottom line my working solution turned a dark amber, a tone darker than Shiner Bock beer. The micro contrast was adversely affected. I was using the same paper and the solution temps the same 20c. Air is introduced into the solution by the transfer back between containers.
A dark amber solution can develop a print but my experience is the print values will not be optimum.
It probably just shortens development time.
? We are talking about paper. Changing dilution just speeds up or slows down development.
It certainly does that, but it's generally known that more dilute print developers can also produce a slightly warmer tone. It's more pronounced with warm tone papers, but I've seen it with more neutral papers as well.
? We are talking about paper. Changing dilution just speeds up or slows down development.
Not always, it can also affect contrast, mostly with the old warm tone papers, again moot. The effects are subtle and not worth the effort. D-72 used to be used mostly for things like Lantern Plates and glass plate negatives and there were other more complicated formulas sold for prints, like D-163 (which I tried and meh, results not enough different from D-72 to bother with).
We have always used Ilford MG developer at my school. With 60 kids one 8x10 tray will last me three days but only if I drop some plastic wrap on the surface of the developer to keep air out.
That's pretty good. How many prints does 60 kids and 3 days equate to, Andy and do all the kids survive for 3 days as well if they persist in making the kind of comments you referred to in another thread?
pentaxuser
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