A light trap is a system or device used in darkrooms to allow people or materials to enter while preventing unwanted light from entering the workspace. Typically consisting of overlapping flaps or baffles, light traps maintain complete darkness, which is essential when handling light-sensitive photographic materials like film or paper.
Understanding and using a light trap is crucial for photographers working in darkrooms, as even a small amount of stray light can fog film or photographic paper, ruining exposures. Light traps help ensure precise control over the developing process, enabling high-quality black-and-white or colour print