Atomic Absorption (Spectrometry) is used for analyzing solutions for their metal content.
Unit to define wavelength of light, ultraviolet energy and x-rays; one angstrom is equivalent to 10-1 nanometres
An accurately scaled pattern (usually a single image) which is used to produce the artwork master or phototool(s); a
product consisting of an image on the surface of a stable base. The proper description of the artwork must include
the required specification for tone and orientation, as these specifications impact subsequent photo processing
operations and/or usability
An accurate one-to-one pattern, usually a single image, which is used to produce the phototool(s). The proper
description of the artwork master must include the required specifications for tone and orientation, as these
specifications impact subsequent photo processing operations and/or usability
The surface area against which the pattern is contrasted. The surface area of the background is usually much
greater than the area of the pattern, as with a clear pattern on a black background or a black pattern on a clear
Viewing or photographing an object by placing it between a light source and the eye or recording medium.
The material to which a coating or plating is applied, and/or from which stock is selectively removed by chemical
machining; the material onto which a photosensitive, strippable or scribable material is applied for use in
Designating or conforming to either of the scales used by the French chemist Antoine Baumé in the graduation of
his hydrometers or relating Baumé hydrometers. There are two Baumé hydrometers. One (Heavy Baumé), which is
used with liquids heavier than water, such as ferric chloride etchants, sinks to zero degrees in pure water and to 15
degrees in a 15 percent salt solution. The other (Light Baumé), for liquids lighter than water, sinks to zero degrees in
a 10 percent salt solution and 10 degrees in pure water.
Lines approximately half etched into the metal surface that can be used to assist with bending the part in a
A raised spot on the surface of metal caused by expansion of gas in a subsurface zone during thermal treatment
Patterns which appear in the border area of phototooling; these patterns may include tooling hole “bulls eyes,”
identification, test patterns, registration and fiducial marks
Also called “oil canning”; a distortion of a metal surface, appearing as a bulge or wave, resulting from unbalanced
stresses in the metal. Buckles in the center of the sheet are referred to as center buckles and those away from the
center are called quarter buckles.
The sharp protrusion of the edge of a slit or sheared strip resulting from the fracture effect of the slitting or shearing
operation; remnant of a breakout tab.
Computer Aided Design (or Drawing) utilized to produce engineering drawings and associated phototooling files for