Reversal materials are photographic films or papers specifically designed to produce a positive image after a single camera exposure and development process. Unlike conventional negative materials, which require printing to create a positive image, reversal materials yield a transparency that can be viewed or projected directly.
These materials are widely used in slide photography, scientific imaging, and professional applications where accurate colour reproduction and sharp detail are essential. By using reversal materials, photographers can evaluate exposures immediately and produce high-quality positive images without the additional printing step.