Abstract: A pattern for camouflage and a method for making the pattern. Rely on photographic images arranged in a synthetic perspective relationship, appearing to extend toward the horizon. The photographic images are images of landscape features in a selected environment. The pattern blends in with landscape features both in proximity to and distant from the camouflage pattern. In one embodiment, the pattern is adapted to be seamlessly repeatable across a surface. In one or two dimensions the method for making the camouflage includes taking photographs and selecting photographic images that represent the landscape features in the selected environment. The method also includes separating those images and arranging them into a repeating pattern. Photographic images are arranged in synthetic perspective which includes obscuring background images with foreground images in a manner that simulates the perspective in the selected environment.

Abstract: High contrast color images can be obtained from aerial color photography by rapidly processing certain color photographic silver halide films with a color developing composition under certain conditions. The color developing composition can have a pH of from about 10.2 to about 10.6 and a color developing agent at a concentration of least 0.015 mol/l. Color development is carried out for less than 180 seconds at from about 40 to about 42° C. The resulting color images have a contrast greater than 0.83, low Dmin, low granularity and high sharpness and resolution.

Abstract: High contrast color images can be obtained from aerial color photography by rapidly processing certain color photographic silver halide films with a color developing composition under certain conditions. The color developing composition can have a pH of from about 10.2 to about 10.6 and a color developing agent at a concentration of least 0.015 mol/l. Color development is carried out for less than 180 seconds at from about 40 to about 42° C. The resulting color images have a contrast greater than 0.83, low Dmin, low granularity and high sharpness and resolution.

Abstract: Spin castable mixtures are provided which are useful for applying onto photoresist surfaces to produce a contrast enhancement layer employing .alpha.-alkyl-N-alkyl nitrones in combination with an inert organic binder and solvent. The .alpha.-alkyl-N-alkyl nitrones can be used with 200-300 nanometers UV light.

Abstract: Contrast enhancement compositions are provided which can be used to make contrast enhancement layer photoresist composites. The composites can be used to make patterned photoresists under mid-UV light and utilize photobleachable alkylnitrones.

Abstract: The image of an object with opaque and transparent regions having a contrast lens than the contrast threshold of a layer of photoresist when light of a predetermined wavelength to which the photoresist is sensitive is passed through the object and onto the layer of photoresist is enhanced in contrast by the provision of a contrast enhancing layer contiguous to the surface of the photoresist to a value above the contrast threshold of the photoresist. The contrast enhancing layer is constituted of an aryl nitrone compound mixed with a suitable binder.

Abstract: Spin castable mixtures having aryl nitrones are provided which are useful in making photobleachable layers for use in contrast enhanced photolithography.

Abstract: More effective camouflage patterns are generated by use of certain known tographic and photooptical contrasting procedures to obtain more desirable positive high contrast images representative of the natural background areas in which military equipment is intended to operate. Generating and using such camouflage patterns constitute a unique and novel use of such images which have predetermined color tones or values assigned to varying degrees of light, intermediate and dark contrast areas. The patterns may be applied onto the equipment in any of several conventionally known manners, thereby enabling otherwise artistically unskilled field soldiers to more effectively camouflage their equipment.