noir
hard shadows. no witnesses.
What it is
- A black and white emulsion, rated ISO 3200 — very fast.
- Balanced for daylight at 5500K.
- Heavy grain (0.132).
How astra renders it
Not a colour overlay. Each stock has its own tone curve, a channel-mixing matrix for crosstalk between layers, halation modelled as a bloom off the film backing, and grain with per-channel weights. It is applied on the GPU at display time — the photo stored and downloaded is the untouched original.
Getting it
Part of astra plus, and dealt free to everyone from time to time — the daily roll draws from all eighteen stocks regardless of what you pay.