description Ilford Ortho Plus Overview
Ilford Ortho Plus is a black-and-white negative film with an orthochromatic spectral response. Unlike panchromatic films, orthochromatic materials have limited sensitivity to red light, which changes how colored subjects are rendered as shades of gray. Ilford markets Ortho Plus for applications such as copying, technical work, and creative photography where this response is useful. It is intended for photographers who want fine-grain monochrome negatives and deliberate control over tonal rendering.
help Ilford Ortho Plus FAQ
What ISO speed is Ilford Ortho Plus?
Ilford Ortho Plus is rated ISO 80 in daylight and ISO 40 under tungsten lighting. It is a fine-grain black-and-white negative film made for high-resolution and technical photography.
What does orthochromatic mean on Ilford Ortho Plus?
Orthochromatic film is sensitive mainly to blue and green light and has little or no sensitivity to red. As a result, red subjects can render unusually dark, while blue skies and blue clothing can appear much lighter than they would on panchromatic film.
What is Ilford Ortho Plus used for?
Ilford positions it for applications such as continuous-tone copying, technical work, medical imaging, and forensic photography. Photographers also use it creatively when they want fine grain and the distinctive tonal separation caused by blue sensitivity.
Can Ilford Ortho Plus be developed in normal black-and-white chemistry?
Yes. It is a black-and-white negative film and can be processed in standard black-and-white developers, although development time and contrast should be matched to the chosen developer and subject.
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