Do you have some formulas that don't involve a scale?
I certainly do!
Film Developers
D-23 (fine grain with some loss of film speed). Lots of info regarding using D-23 avaiable on t'internet.
water at 125 degrees F - 750 ml
Metol - 2 1/2 teaspoons
Sodium Sulphite 12 1/2 teaspoons
Cold water to make up to 1 litre.
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D-76 (H) - standard all-purpose developer
Use as original Kodak D-76
Water at 125 deg F - 750ml
Metol - approx 2/3 of a teaspoon
Sodium Sulphite 12.5 teaspoons
Borax 1/2 teaspoon
Water to make to 1 litre
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Pyrocat HD (a VERY cheap and economical compensating developer - great for toycam negs to compensate for loss of exposure control). Expose at film box speed or slightly slower. This is more complex to mix, but is worth the effort.
To make 100 ml both A and B
A solution
Water at 100-125 deg F - 75 ml
Sodium Metabisulphate approx 1/5 teaspoon
Pyrocatechol 1 1/2 teaspoon
Phenidone 1/8 teaspoon (may need dissolving in isopropyl alcohol before adding)
Potassium Bromide 1/8 Teaspoon
Water to make to 100 ml
B solution
COLD water 75ml
Potassium Carbonate 11 1/2 teaspoons
water to make to 100 ml (if like me you find it difficult to get into solution, just double amount of water and double the amount of B stock you use when making working developer)
Store separately. To make working developer, use at 1(A):1(B):100 (water) at around 21 degrees. Most films should require same development time - around 14 minutes using constant inversions for first minute, then 4 inversions every three minutes. Shorter times are achieved by using 4 inversions every 1 minute.
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Hypo-Clearing Agent (HCA - like Ilford Wash Aid etc)
1 teaspoon of Sodium Sulphite stirred into 600(ish) ML warm water.
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If you are thinking of doing these, make sure you look up safety information for each chemical before handling and take care to wear gloves, eye and breathing protection as necessary. As amounts wont be exact, variations on times etc will happen but they should all work pretty well.