Back to results
US 4,269,916 AGranted
Photographic prints utilizing lamellar pigment materials
AssigneePolaroid Corporation
InventorsRuth C. Bilofsky, Howard G. Rogers
Life of this patent
Estimating the term…
Abstract
Photographic products having reflective layers which comprise lamellar interference pigments.
Claims18
A photographic print comprising a support carrying an image-containing layer which is viewable against a substantially white layer comprising a lamellar pigment dispersed in a matrix material, said lamellar pigment having at least one layer with a geometric thickness of a value with the expression:
- ##EQU5## where:
- T is the geometric thickness of the layer, .lambda. represents a wavelength or wavelength range of radiation in the visible region of the spectrum, n is the refractive index of the layer material and is at least 1.7, any layer adjacent said one layer having a geometric thickness of a value also within said expression but comprising a layer material having a refractive index different from the refractive index of said one layer.
Dependencies are inferred from the claim text.