Dust was every photographer’s enemy in the film darkroom days. A tiny speck of dust on a negative could show up as an unwanted white spot on every print. Photographers carefully cleaned negatives with soft brushes, air blowers, and anti-static cloths before printing. Even with great care, spotting prints with a fine brush and special dye was often part of the process. Keeping negatives dust-free was an important skill in traditional photography.
