Opaque: A condition where a material, such as a cloud, blocks the passage of radiant energy, especially light. Opaque sky cover refers to the amount of sky cover that completely hides all that might be above it.

 

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Opaque: A condition where a material, such as a cloud, blocks the passage of radiant energy, especially light. Opaque sky cover refers to the amount of sky cover that completely hides all that might . . . View Full Definition

Opaque Coating: A coating that hides the previous surface coating.

Opaque Mineral: A mineral which transmits no light through a thin section under a microscope. Usually a native metal, sulfide, or metallic oxide mineral.

Opaque Liquid: Is a dense red or black pigment, dissolved in water to form a liquid paint used to fill in film areas that are required to pint as pure white.

Opaque Stain: An exterior stain that obscures the natural color and grain of wood, but still allows the texture to show through.

Mask: Is an opaque material used to cover the edges of the printing paper, and thus produce borders when the paper is exposed to light.

Photogram: Pattern or design produced by placing opaque or transparent objects on top of a sensitive emulsion, exposing it to light and then developing it.

Radiography: Technique of using x-rays, gamma rays and charged particles to form shadow images on photographic materials. Used in medical and industrial research because of its ability to penetrate opaqu . . . View Full Definition

Lens Hood: Opaque tube, either cylindrical, square of funnel shaped, use to shield a lens from stray light outside the field of view.

Step Wedge: Printed series of density increases, in regular steps from transparent to opaque. Its a method of making exposure tests when enlarging.