Reading a Negative: Thin or Dense, Flat or Contrasty

**Look at the shadows for exposure.** The darkest parts of the subject are the thinnest parts of the negative, and they are where under-exposure shows first. *Clear film in the shadows with no detail at all* — under-exposed. Nothing can recover it, because nothing was recorded. *Shadows carrying faint but real detail* — correct. *Shadows already quite dense* — over-exposed. Still printable, with more grain and less sharpness. **Look at the highlights for development.** They are the densest parts, and they are where development shows. *Highlights so dense you cannot see through them* — over-developed, too much contrast. Print on a softer grade. *Highlights barely darker than the mid tones* — under-developed, flat. Print on a harder grade. **The newsprint test.** A well-exposed, well-developed 35 mm negative should let you just about read newsprint through its densest area. It is a crude test and it is remarkably good. **Look at the clear film outside the frame too.** It should be nearly transparent with a slight base tint; if it is visibly grey, the film was fogged.

Because exposure and development are independent, there are four cases and each has a different fix. **Thin and flat** — under-exposed and under-developed. The worst case: there is nothing there to print. More exposure AND more development. **Thin and contrasty** — under-exposed and over-developed. Empty shadows with blocked highlights. This is what pushing does, and it is why pushing is a compromise rather than a free speed increase. More exposure, less development. **Dense and flat** — over-exposed and under-developed. Printable, grainy, dull. Less exposure, more development. **Dense and contrasty** — over-exposed and over-developed. Blocked highlights over usable shadows. Less of both. **The one to aim for** is a negative that just barely has detail in the important shadows and highlights you can see through. It will look disappointingly thin and low in contrast held up to a window, and it will print beautifully — a negative that looks impressive is usually over-developed. Write the diagnosis on the sleeve with the roll's log. Two rolls with the same diagnosis is a systematic error; one is an accident.

**Completely clear film, no frames, no edge markings at all** — the film never went through the camera, or was never developed. Check whether the edge printing is there: if it is, the camera never exposed it; if it is not, the developer did not work. **Completely black film** — fogged to daylight, usually opened before fixing. **Clear crescents** — the film was kinked, which cracks the emulsion. Handling damage, usually while loading the reel. **Streaks running down from dense areas** — bromide drag from too little agitation. **A clear blotch with a hard edge** — two turns of film touched in the reel, so no developer reached that spot. **Small round clear spots** — air bubbles that stuck to the emulsion. Tap the tank after each agitation. **Milky overall haze** — under-fixed. Re-fix it in fresh fixer and wash again; this one is genuinely recoverable. **Fine crazing over the whole frame** — reticulation, from a large temperature difference between baths. **A red or purple cast to the base** — the anti-halation layer did not wash out. More washing. **Dense streaks from the sprocket holes inwards** — too much agitation, surging developer through the holes.

A **contact sheet** is the whole roll printed at once, in contact with the paper, at one exposure. It is the fastest way to read a roll and the only way to compare frames honestly. **Make it at a standard exposure** — the one that just barely renders the clear film between the frames as full black. That is a fixed reference: at that setting, a frame that prints too dark is a thin negative and a frame that prints too light is a dense one, and the whole roll can be read at a glance. Finding that exposure is a test strip on a scrap of clear developed film, done once for a given paper and enlarger height and then written on the wall. **Keep it with the negatives.** A sleeve of negatives with its contact sheet is a usable archive; a sleeve without one is a box that never gets opened. **Mark it up.** Ring the frames worth printing, note the crop, note the areas that will need holding back. That marked sheet is the plan for a printing session, and it turns an afternoon of guessing into an afternoon of printing. This is also where a roll's log finally pays: frame by frame, the settings against the result, in one view.