Sandwiching is a photographic technique where two or more negatives or film positives are combined together in the negative carrier or masking frame during printing or enlarging. This allows multiple images to be layered into a single final print, creating composite or artistic photographic effects.
Photographers use sandwiching to experiment with creative double exposures, surreal imagery, and layered visual storytelling in the darkroom. By carefully aligning multiple negatives, unique and imaginative results can be produced that would be difficult to achieve with a single exposure alone, making sandwiching a popular technique in experimental and fine art photography.