Any B&W film can be converted to an ortho film by using a minus red filter on the camera. The are several types depending on how much red is removed from the light reaching the film.
This information is inaccurate, Maco has licensed the Rollei name. Rollei isn't involved other than getting paid for the use of their name. The Ort25C was made by efke. The new Ortho film is not and is not Agfa either.