The ROLLEI ORTHO 25 is a technical, steeply working monochrome photographic film with a nominal sensitivity of ISO 25/15°.
The ROLLEI ORTHO 25 is characterized by a high sensitivity reserve of up to two f-stops, depending upon development.
The document emulsion offers an extraordinary sharpness extreme fine grain.
The ROLLEI ORTHO 25 is well suited for technical-scientific applications and as a half-tone film in pictorial photography.
The highly clear transparent PET substrate opens the possibility of application as b&w slide film also.
Technical – scientific applicationFor
reproductions, radiographic reproductions, astro photography,
black-and-white and blue slide, for graphic distancing. Particularly
for this
application we recommend the LP-DOCUFINE HC developer (1+5, 3-5 min.).
Half-tone film in pictorial photographyWith
highest requirements in terms of sharpness and extreme fine grain, the
ROLLEI ORTHO 25 offers excellent results in combination with
the fine grain balance developer ROLLEI HIGH SPEED (LP SUPERGRAIN).
The ROLLEI ORTHO 25 in combination with the ROLLEI LOW SPEED developer, has an legendary call of CONTRAST which b&w
developers
can compile. The results remind of qualities obtained by the famous
Technical Pan film. The comparable steep gradation is bent
by this
special developer. Extreme fine grain structures and highest sharpness
connected with detailed gray tones, can be reached in such a
way.
The
ORTHO 25 in combination with the ROLLEI LOW CONTRAST developer has
compiled itself a legendary call. These results reminiscent of the
quality of technical pan-Film. The comparatively steep gradation is
bent by this special developer. Extreme fine graininess and highest
sharpness connected with detailed grey tones are reached in such a way.
Properties:- Panchromatic sensitized with low speed ISO 25/15;
- Spectral sensitvity 380 – 610nm;
- Special coating for an improvement of the transport properties of the cameras
- Suitable for daylight and tungsten;
- Polyester base support guarantees the highest level of archive stability (LE 500);
- Excellent resolving power of 330 lines/mm
- Extreme fine grain and highest sharpness, as a base for negatives with an excellent quality;
- With “non-curling†backside coating to improve flatness;
- Especially suited for digital application for scanner;
- Film base: 35mm and rollfilm polyester, 100µm, crystal clear; sheet film, 175µm, crystal clear
- Layer
- Emulsion side: emulsion coating orthochromatic sensitized, antihalation coating
Click here to download the Technical Data Sheet in PDF format for
Rollei ORTHO 25 film. 
