Colour reversal film, also known as slide or transparency film, is designed to produce a positive colour image directly on the film after exposure, rather than a negative. The resulting transparency can be viewed with transmitted light, projected, or printed onto photographic paper. Colour reversal film is valued for its vibrant colours, high contrast, and fine detail, making it popular for professional photography, slideshows, and archival purposes. It requires precise exposure and careful processing to achieve accurate colour reproduction and optimal image quality.