Weight Loss Is the Clock: A Dry Cure Is Finished by the Scale, Not the Calendar

**Weigh after curing and before hanging.** That is the number the loss is measured from, and it is not the same as the green weight used for the salt — a piece gains a little in a brine and loses a little in a dry cure. Record both, and be explicit about which one a percentage refers to. Most published targets are against the green weight. **Write it on the tag, tied to the piece.** Not on a note in a drawer. The tag should carry the green weight, the post-cure weight, the date it was hung and the target weight, worked out in advance so the answer is a comparison and not a calculation each time. **Weigh weekly.** More often tells you nothing and disturbs the chamber; less often and a problem has three weeks to develop. **A stalled weight is information.** A piece that stops losing weight has usually case-hardened — a dry, sealed crust with wet meat inside. That is the curing chamber's problem and the next rung's subject. A kitchen scale reading to a gram is plenty. A 1400 g piece losing 35% ends at 910 g, and single grams do not matter.

Jerky is the same measurement with a much larger number. A 60 to 70% loss takes it well below 0.75 water activity, which is why it keeps at room temperature with no nitrite and no refrigeration. It is also why jerky is cut thin. The drying time goes with the square of the thickness, exactly as salt penetration does, so 5 mm strips dry in hours and 20 mm strips take days and spoil on the way. **The bend test** is the traditional endpoint and it works: a finished strip bends and cracks but does not snap cleanly, and shows no moisture at the crack. A strip that snaps is over-dried; one that folds without cracking is not done. **The safety step people skip.** Drying alone does not reliably kill the pathogens that were on the raw meat — it only stops them multiplying. Published guidance is to heat the meat to **71 C** either before drying or after, which a low dehydrator never reaches. Ten minutes in a 135 C oven after drying does it and costs almost nothing in texture. Air-dried fish goes further still, to 60% loss and beyond, and traditionally adds salt, cold air and wind. Stockfish keeps for years on those three alone.

**Losing too fast** — more than about 2% a day on a whole muscle. The air is too dry or moving too hard. The risk is case hardening: the outside seals before the inside has dried, and the piece stalls with wet meat trapped under a hard crust. Raise the humidity, slow the air, or wrap the piece in cloth or a net to slow the surface. **Losing too slowly** — under about 0.3% a day. The air is too damp or too still. The risk is the opposite: the surface stays wet long enough for the wrong moulds and for slime. Lower the humidity a little or improve the airflow, and check the piece is not touching anything. **Stalled completely.** Almost always case hardening. Vacuum-seal the piece and leave it a week in the fridge: the moisture redistributes from the wet centre to the dry outside, and it can then be hung again. This genuinely rescues pieces that look ruined. **Overshot the target.** A piece dried to 50% is not dangerous, it is hard. Slice it thinner and use it where that suits — it is why some traditions dry deliberately far past the shelf-stable point. The one thing not to do is decide it is probably fine. The scale gives a number; the number is the answer.