Photographic products and processes using reflective layers...

Details Photographic products and processes using reflective layers... Photographic products and processes using reflective layers...

G - Physics

03

C

96/33

G03C 1/84 (1980.01) G03C 5/54 (1980.01)

Patent

CA 1132394

ABSTRACT Photographic products and processes presented by way of the present invention include novel light-reflecting layers providing a substantially white background against which the image is viewed. Essentially, the novel white light-reflecting layers of the products and processes of the present invention comprise lamellar, interference pigments dispersed in a suitable matrix material. The lamellar, interference pigments of this invention are flat, platelike, transparent or slightly trans- lucent, white light-reflecting, single or multi-layer pigments. These pigments can be broadly defined as having at least one layer which has a geometric thickness within the following expression: T=.lambda./4/n (or an odd multiple thereof)., where: T is the geometric (or physical) thickness, .lambda. represents a wavelength or wavelength range of radiation in the visible region of the spectrum, n represents the refractive index of the layer material and is at least 1.7.

315825

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