Finally tested the various vintage sixth plates I bought. Results.
- Kodak p800, not usable, emulsion cracks and crumbles
- Kodak p300. 2 packs not great, but might work. One pack foggy but no emulsion issues. I think they'll be about ISO 0.5
- Ilford fp4. These are great. Very clean, very low fog. ISO 6 looks usable
The Kodak p emulsions seem to need *a lot* of dev. Hc110b 10 minutes is ok, but I'd want denser. Ilford good at 5.







