Colour negative · 2000–2005
Ferrania Solaris FG Plus 100
Italian everyday colour, fine-grained and forgiving.
Italian everyday colour on a sunny holiday snapshot: bright, saturated daylight colour on the finest-grained film of the FG Plus family. Original vs Ashigrain.
At a glance
- Exposure index
- 100
- Daylight
- Introduced
- by 2002
- Discontinued
- Process
- C-41
- Prints on
- Scan
About the film
Ferrania S.p.A. of Cairo Montenotte, near Savona in Italy, made Solaris FG Plus 100, which its own sheets print as FG PLUS 100.
The earliest dated evidence for the film is the English brochure it shares with FG Plus 200, which carries the print code 09/2002. Ferrania presented FG Plus as the newest generation of its photographic films, following its earlier FG range. It credited the generation to its own technologies: Structured Homogeneous Crystals, Ultra Thin Layers and Accurate Color. The brochure adds a new distribution of DIR couplers, a new cyan coupler and a UV trimmer. Ferrania aimed it at everyday colour prints, stressing wide exposure latitude, tolerance of poor storage and consistent results in any C-41 laboratory, and said professionals would value its easy printing set-up. The brochure gives an RMS granularity of 3.5 through a 40 µm aperture and the DX code 87-3. The film is no longer made: the original Ferrania factory stopped making film, and the present-day company FILM Ferrania grew out of it.
Sources for this history
The look
Ferrania Solaris FG Plus 100 is an Italian daylight ISO 100 colour negative for everyday prints, built for wide exposure latitude. The slowest of the FG Plus family, it has the finest grain of the four. Ashigrain renders it as a scan for your grade.






Best for
- Sunny holiday snapshots
- Fine-grained daylight colour
- Early-2000s consumer print looks
Compare camera films
Science & sources


A daylight still-photo colour negative rated at EI 100. It defaults to a scan. Its curves, grain and single visual MTF come from Ferrania's brochure; its individual dye shapes are borrowed from Kodak Vision3 250D, because the brochure does not publish them.
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 40 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 |
|---|---|---|---|
| R | 0.3 | 0.005408 | 0.005332 |
| G | 0.3 | 0.005367 | 0.005269 |
| B | 0.3 | 0.009393 | 0.009277 |
| R | 0.6 | 0.004731 | 0.004665 |
| G | 0.6 | 0.004722 | 0.004637 |
| B | 0.6 | 0.010226 | 0.0101 |
| R | 1 | 0.004584 | 0.004519 |
| G | 1 | 0.004625 | 0.004541 |
| B | 1 | 0.008283 | 0.008181 |
| R | 1.5 | 0.003382 | 0.003335 |
| G | 1.5 | 0.004635 | 0.00455 |
| B | 1.5 | 0.007947 | 0.007849 |
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.
- Colour-print timing and scan balance under arbitrary lighting are modelled. Scanner colour balance has no standard physical unit.
- Conversion-filter spectra (80A for daylight films under tungsten, 85 for tungsten films in daylight) come from separate measured filter data, not from this film’s source. Applying those filters to this film remains modelled.
- Only a midscale neutral and a minimum-density spectrum are printed, not separate cyan, magenta and yellow dye spectra. The individual dye shapes are borrowed from Kodak Vision3 250D (5207), a proxy rather than this film's dyes.
- The source prints one visual MTF curve, not separate red, green and blue curves. The model applies it to all three layers.
- The source publishes one diffuse RMS granularity value, 3.5 × 10⁻³ at 1.0 above minimum density through a 40 µm aperture. The granularity response away from that level is modelled.
- The printed MTF rises above 100 %, to about 114 % at low frequencies. Ashigrain models this as development adjacency, enabled by default. Its width, strength and dependence on density and development are approximations.
- The source states that no reciprocity correction is needed from 1/10,000 s to 10 s, and the model applies none.
- No antihalation layer is named for this film; an undercoat is assumed. Halation strength, radius, layer weights and bloom are not measured.
- Individual dye amounts, layer interactions and push/pull behaviour are approximated where the datasheet provides no calibration. Grain size is assumed; published RMS granularity does not specify dye-cloud size.
- Characteristic response outside the published exposure range is an extrapolation, not measured film data.
- The default output is a scan. Scan balance has no standard unit and is modelled.
- The printer lamp and filter spectra and the Status A grey aim used in this preview are approximated; the source does not publish the required spectral or laboratory aim data.
Reciprocity: not modelled. Exposure time has no effect on this film.
Film guide: assumptions and practical choices
Sources
- Process: Ferrania Solaris FG PLUS 100 / FG PLUS 200 brochure (English), Wayback Machine capture 20061015210258 of ferraniait.com/solutions/photography/download/brochure100200eng.pdf (PDF created 2003-02-14), p. 8
- Characteristic curves: Ferrania Solaris FG PLUS 100 / FG PLUS 200 brochure (English), Wayback Machine capture 20061015210258 of ferraniait.com/solutions/photography/download/brochure100200eng.pdf (PDF created 2003-02-14), p. 10
- Diffuse RMS granularity: Ferrania Solaris FG PLUS 100 / FG PLUS 200 brochure (English), Wayback Machine capture 20061015210258 of ferraniait.com/solutions/photography/download/brochure100200eng.pdf (PDF created 2003-02-14), p. 10
- Exposure index: Ferrania Solaris FG PLUS 100 / FG PLUS 200 brochure (English), Wayback Machine capture 20061015210258 of ferraniait.com/solutions/photography/download/brochure100200eng.pdf (PDF created 2003-02-14), p. 10