D-76 film developer

Description

D-76 as a ready working solution — the developer every other one is measured against. Kodak’s 1927 formula: metol, hydroquinone, a great deal of sodium sulphite and borax. Fine grain, full film speed and a predictability that borders on dull.

Why D-76

There is around 100 g of sodium sulphite per litre here, and it does more than keep the developer from oxidising: it is a mild silver solvent, etching the edges of the grains so that grain prints finer than it is. Together with the metol/hydroquinone pair that gives an even characteristic curve with highlights that hold. It is why film makers still print D-76 times on the data sheet — it is the reference everything else is quoted against.

Stock or 1+1

At stock strength the grain is finest and the solution can be replenished and reused. At 1+1 it becomes a one-shot: slightly more contrast, noticeably better sharpness, and grain you can see. Both are standard; choosing between them is choosing smoothness or bite, not right or wrong.

Worth knowing

It is temperature-sensitive — two degrees shifts the time by ten per cent or so. A working solution keeps for months in a full, tightly closed bottle and weeks in a half-empty one, because it oxidises against the air above the liquid. Take development times from the film maker’s chart or from the recipe page in our library.

Questions and answers

How is this different from mixing it myself?

Only in your time and your scales. It is the same formula, weighed and dissolved for you, as a ready working solution — open it and pour.

How many rolls will a litre do?

The yield is in each size’s name. If you replenish after each roll, extend the time per the manufacturer’s chart — an exhausted developer works slower, not worse.