I wasn't sure what the characteristics of ortho film were, but
this discussion on the largeformatphotography forum is helpful.
in part:
"Orthochromatic film, or pan film with a #44 renders foliage and shadows in a way that is difficult otherwise. It is a specific "look" that comes from the red not being recorded and the blue and green predominating. Skies are lighter, shadows and green foliage are lighter, while reds are rendered almost black."
Another user found the film very good for portraiture.
NEW PRODUCTS ANNOUNCED!
Including 5th Generation ILFORD MULTIGRADE RC paper and ORTHO PLUS film in 135 and 120 formats.
https://www.ilfordphoto.com/new-products-announced/
ILFORD ORTHO PLUS
We are expanding the world’s biggest selection of black & white films with the addition of ILFORD ORTHO PLUS in 135 and 120 formats. As the name suggests this is an orthochromatic black and white film (all other ILFORD and Kentmere films are panchromatic) rated at ISO 80 in natural light and ISO 40 in Tungsten.
“Our Ortho film was designed as a technical, high-resolution copy film for negatives and has been available in sheet format for some time. We know photographers want choice and love to try new films and so we have now coated our Ortho emulsion onto an acetate base for 35mm cassettes and 120 rolls. We believe ORTHO PLUS offers superb photographic potential thanks to its fine grain and sharpness and some of the results we have seen are stunning.” Giles Branthwaite, Sales & Marketing Director.
The blue and green sensitivity of this emulsion enables the film to be handled in deep red safelight conditions making processing and inspection easier. Its lack of red sensitivity also means that reds and oranges are rendered darker than panchromatic films.
ILFORD ORTHO PLUS will be available from early November. Check your preferred stockist for pricing.