EFKE FILM TECHNICAL DATA

Efke KB25 and R25 Film

efke KB25 and R25 density curves


efke KB25 nominal film speeds


efke KB25 spectral sensitivity


Efke KB50 and R50 Film

efke R50 density curves


efke R50 nominal film speeds


efke R50 spectral sensitivity

Efke KB100 and R100 Film

efke R100 density curves


efke R100 nominal film speeds


efke R100 spectral sensitivity

Efke PL100 Film

efke PL100 density curves


efke PL100 nominal film speeds


efke PL100 spectral sensitivity

Notes:

1. The reference developer used for the D log E curves is efke FR-14, a general purpose developer similar to Kodak D-76 and Ilford ID-11.
2. efke FR-16 is a universal type developer for films and papers
3. efke FR E-24 is a high speed low grain type of developer
4. Overexposure is not recommended with efke films. This is due to the single layer structure of the film, which produces light scattering if overexposed. For best results expose the films either at nominal or higher speeds.
5. The plates above reference a "cellulose emulsion support". This is for the older efke films which have a grey-coloured base. If you have an efke film with the dark blue-green coloured base, this is the newer polyester support. This support is extremely strong and can damage your film winding sprockets if you wind past the length of the film. It is recommended to use only the older cellulose support films if you intend to attempt winding past the end of the film.