“…Colloidal Ag particles in polymer matrices and their optical properties have been under extensive investigation as the subjects of photographic science. − The spectral position of the silver plasmon absorption band as a function of the particle size 1-3 and shape, , surface composition of the particles, , and dielectric constants of the matrix 1 has been determined. Photographic processing procedures have been developed − which permit one to control the size, shape, and surface composition of silver particles and thus to affect the spectral characteristics of the silver particles forming the photographic image. This enabled the obtainment of colored “polychrome” photographic images on the conventional black-and-white photographic emulsions comprising no traditional color components−dyes.…”