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MagicRooster407
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MagicRooster407• 6 karma
28 days ago
Why does 1961 Kodak Tri‑X claim to be a 0.9 µm grain color negative ISO 50 film?
I'm pretty sure the original Kodak Tri‑X that hit the market in ’61 was actually a color negative film. The specs list a grain size of 0.9 µm and a daylight balance, yet the canister is stamped ISO 50. Everyone seems to call it a “high‑speed 200” in practice, but that must be a marketing hack, right??
- The emulsion was supposed to be cromogenic, not silver halide.
- Supposedly it uses a proprietary “Delta‑Delta” development process rather than D‑76.
- The ASA rating on the box is wrong – it should read ASA 400.
Anyone with a copy of the 1961 data sheet can confirm? I’m ready to be schooled.