Rollei Ortho 25 Plus film, 5 x 4in, ISO 25

Rollei ortho film is an orthochromatic sensitised photographic material coated onto a clear and stable 100% polyester base. Depending on the type of processing, this film offers the choice of different applications: Display film for backlighting + normal viewing on light boxes.

Rollei Ortho 25 is a technical, orthochromatic black and white photographic film with a nominal sensitivity of ISO 25/15°. Rollei ORTHO 25 is characterised by a high sensitivity reserve of up to two f-stops, depending upon development. The document emulsion offers fantastic grain images with high sharpness. Rollei ORTHO 25 is ideal for technical and scientific applications and as a halftone film for pictorial photography. The crystal-clear RC base opens up the possibility of using the film as a B&W slide film. 

Technical and scientific applications:

• Reproductions
• Reproduction of X-ray images
• Astrophotography
• Black and white slides and blue slides
• Graphic distancing

For this application, in particular, we recommend Rollei High Contrast (RHC) developer (1 + 5, 5 - 6 min.). Halftone film for pictorial photography: Rollei Ortho 25 in combination with Rollei Supergrain (RSG) exceptional grain contrast developer offers the highest standards of sharpness and excellent grain. Ortho 25 has also developed a legendary reputation when used in combination with Rollei Low Contrast developer. The results are reminiscent of qualities obtained by a Technical Pan film. This particular developer softens the comparatively steep gradation. Extreme fine grain and high sharpness, coupled with detailed grey tones, can be achieved in this way.

Features:

• low-speed orthochromatic black and white film
• spectral sensitivity of 380 to 610 nm
• Special coating to improve the transport properties of the film in the camera
• Suitable for use in daylight and artificial light, without any restrictions
• Polyester base with high tear resistance, ideal for archiving LE 500. Extremely high resolving power of 330 line pairs/mm, depending on the developer
• Beautiful grain and high sharpness as a base for excellent-quality negatives
• Ideal for scanning and digital processing