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ROLLEI ORTHO 25 plus
Very fine-grained, high resolution film with sharp edges for highest detail reproduction and extreme enlargements. The Rollei ORTHO 25 plus is ideal for a wide range of demanding applications.
Available Sizes
35mm
120 Roll Film
35 mm Bulk Ware
Sheet | various formats
Made with ROLLEI ORTHO 25 plus
The Rollei ORTHO 25 plus is orthochromatically sensitized with a nominal sensitivity of ISO 25/15°. It is a technical, steeply working black-and-white film with a high sensitivity reserve of up to two apertures (depending on development). The document emulsion offers an extraordinary sharpness, with finest grain and extremely high resolving power. The ORTHO 25 plus is used for technical-scientific applications and as a halftone film in image-based photography. But also charismatic portraits, high-contrast still lifes and epic landscapes are no problem for him.
ROLLEI ORTHO 25 plus Fact Sheet
Nominal Sensitivity:
ISO 25/15° | very low sensitive
Sharpness:
extreme high sharpness
Exposure Latitude:
± 2 apertures
Resolving Power:
high resolving power
Suitable for BW Reversal:
perfectly suitable as slide
ROLLEI ORTHO 25 plus Development Table
Sharpness
Due to the special document emulsion, the ORTHO 25 plus offers an extraordinary sharpness with finest grain.
Perfectly suited as slide
Due to the crystal-clear PET carrier, the ORTHO 25 plus is ideally suited as a black and white slide.
Agitation: In the first 60 seconds continuously, then for 5 sec every 30 seconds.
Process temperature: 20°C/68°F
The development times given below are to be understood as guide values and refer to an average contrast of γ = 0.65. Due to individual processing conditions, deviations in times are possible.
| Developer | ISO | Dilution | Time [min.] (20°C/68°F) |
|---|---|---|---|
| Rollei Supergrain | 25/15° | 1+12 | 5:30 |
| Rollei RLC | 25/15° | 1 + 4 | 6 |
| Rollei RHC | 25/15° | 1 + 7 | 5 |
| Rollei RLS | 25/15° | 1 + 4 | 10 (24°C) |
| Rollei RLS | 50/18° | 1+4 | 12 (24°C) |
| R09/Rodinal | 25/15° | 1 + 25 | 5:30 |
| R09 Spezial/Studio | 25/15° | 1 + 31 | 6 |
| ILFORD ID-11 | 25/15° | 1 + 1 | 8 |
| ILFORD PERCEPTOL | 25/15° | stock | 10 |
| Kodak D-76 | 25/15° | 1 + 1 | 8 |
| Kodak T-Max | 25/15° | 1 + 4 | 7 |
| Spur Acurol-N | 25/15° | 1 + 70 | 11 |
