Black-and-white negative · Black & white
Fomapan 100 Classic
Everyday black-and-white from Foma's Classic negative.
Fomapan 100 Classic printed on Kodak B&W Print Film 2302. Original vs Ashigrain.
At a glance
- Exposure index
- 100
- Introduced
- by 2016
- In production
- Process
- Ilford Microphen (stock), 20 C
About the film
Fomapan 100 Classic is a panchromatically sensitised black-and-white negative film documented by FOMA BOHEMIA. The dated FOMA 01/16 sheet establishes the exact Classic product by 2016, rather than a launch in that year.
Foma described broad exposure latitude and processing in common negative developers. The maker intended the negatives for conventional black-and-white printing, recommending its Fomabrom and Fomaspeed papers while also allowing other enlarging papers. The sheet distinguishes grey or grey-blue triacetate for 35 mm film from the clear polyester supports used for 120 and sheet film. Foma's current official listing continues to offer Fomapan 100 Classic, establishing a current product rather than unchanged chemistry since 2016. The sources read do not establish its launch year or continuity with earlier products that shared the Fomapan 100 name.
Sources for this history
- FOMAPAN 100 Classic technical data sheet, FOMA BOHEMIA
- FOMAPAN 100 Classic, FOMA BOHEMIA
The look
Fomapan 100 Classic is a nominal ISO 100 panchromatic black-and-white negative for conventional printing. The model uses the sheet's Microphen 7-minute curve at 20 °C, with an assumed exposure anchor and grain proxied from Eastman Double-X 5222. It prints on Kodak 2302 by default.






Best for
- Conventional black-and-white photography
- Comparing Microphen-developed negatives
- Daylight subjects at nominal ISO 100
Compare camera films
Science & sources


The model uses the FOMA 01/16 sheet's Microphen 7-minute curve at 20 °C, on a relative exposure axis with an assumed normal point. Its middle curve also appears in an older Fomapan 400 sheet, leaving emulsion attribution uncertain. Grain is proxied from Eastman Double-X 5222; the published RMS 13.5 has an assumed 48 µm aperture and an unresolved density convention.
Response curves and the evidence behind the model
Compare manufacturer data with Ashigrain’s response on the same axes. These curves show how the model is calibrated to its sources; they do not establish a match to photographed film.
Characteristic response
RMS granularity
Density variation (σD) measured through a 48 µm aperture. Where the datasheet gives a single grain value, the response away from that point is an approximation.
| Channel | Density | Datasheet-based σD | Model σD |
|---|---|---|---|
| N | 0.3 | 0.009447 | 0.009324 |
| N | 0.6 | 0.01095 | 0.010808 |
| N | 1 | 0.012333 | 0.012173 |
| N | 1.5 | 0.01263 | 0.012466 |
| N | 2 | 0.013647 | 0.01347 |
Model limits
These images show the film model in use. Spectral response, lighting and viewing conditions include approximations. Halation, bloom, grain size, weave and flicker are not fully measured for each film. The look of real film also depends on development and print timing.
- Custom lighting spectra, camera metering and the spectral reflectance inferred from fixed-white-balance footage are assumptions used by the model, not measurements of this film.
- The source gives no colour balance. Daylight calibration and spectrally neutral silver density are assumptions.
- The curve is the Microphen 7-minute curve at 20 °C. The 5-minute and 11-minute curves are recorded alternatives, not calibrated whole-stop EI push sets; push and pull use a generic model.
- The exposure axis is relative, with no lux-second scale or marked normal exposure. The normal point at −2.02 is assumed using the printed minimum density of 0.27 as fog, although the curve begins above the actual fog level.
- The middle characteristic curve reuses artwork from the older Fomapan 400 sheet. Its attribution to one emulsion is uncertain; shared artwork does not establish identical emulsions.
- The printed RMS granularity 13.5 has an assumed 48 µm aperture and does not specify gross or net density. Grain is proxied from Eastman Double-X 5222 rather than taken from that headline.
- The physical silver-clump diameter is assumed to be 4.5 µm from the speed class; it is not measured by the RMS granularity value.
- The unscaled spectrogram envelope is interpreted as relative log sensitivity, with wavelength labels aligned to the printed lattice. That conversion is assumed, and the processed grid ends at 665 nm.
- The model does not enable a development-adjacency effect for this film. The printed MTF near 101 % does not provide its spread width, amplitude, fit shape or density/development dependence.
- The preview uses the grey 135 triacetate base and its 125 µm thickness as the halation model's geometry. The polyester roll and sheet supports do not have separately measured halation responses.
- The default halation-radius scale is referenced to Kodak Vision3 500T (5219), whose base thickness is not published. The thickness scaling is therefore an assumption.
- The sheet prints reciprocity corrections at a few exposure times; the correction between them is interpolated.
- Foma's stated latitude from ISO 50 to ISO 400 without changing development is a manufacturer claim, not a calibrated rendering guarantee.
- Only the archived 2016 source edition is used; no independent digitisation-error estimate is available.
- Characteristic response outside the published exposure range is an extrapolation, not measured film data.
- In the print branch it prints on Kodak B&W Print Film 2302 by default. Black-and-white print timing is modelled.
- Halation strength, radius and layer weights are not quantified by the datasheet. The effect of removing antihalation and the bloom response are also approximations.
- The available sources do not measure veiling flare during projection. The model approximates its contribution to lifted blacks on screen, so the result is not a measured projection contrast.
Reciprocity: modelled from 1/1000 s to 100 s, following the datasheet's corrections for long and short exposures. Exposure time stops at the ends of that range.
Film guide: assumptions and practical choices
Sources
- Characteristic curves 7min: FOMAPAN 100 Classic technical data sheet, FOMA 01/16, p. 1
- Diffuse RMS granularity: FOMAPAN 100 Classic technical data sheet, FOMA 01/16, p. 1
- Exposure index: FOMAPAN 100 Classic technical data sheet, FOMA 01/16, p. 1
- Process: FOMAPAN 100 Classic technical data sheet, FOMA 01/16, p. 1