Opacimeter 

In General Printing Terms by Inkjet Insight

A device used to measure the opacity of a paper by gauging how much light is being reflected back through paper, using either the diffuse opacity method or the contrast ratio method. See Opacity.

Opacity 

In General Printing Terms by Inkjet Insight

In optics, the extent to which an object or surface will impede the transmission of light through it. A completelyopaque object is one which allows no light to pass through it.

Opaque 

In General Printing Terms by Inkjet Insight

When used as an adjective, opaque is descriptive of any substance or material that does not allow the transmission of light through it, or possesses a high degree of opacity. The opposite of

Opaque Pigment

In General Printing Terms by Inkjet Insight

White pigments used in printing inks that do not let light pass through them, and are used for printing white, or for mixing with other colors to increase opacity or lighten the color.

Optical Brightener 

In General Printing Terms by Inkjet Insight

A material (typically a fluorescent dye) added to paper to increase its brightness. As an optical brightener absorbsultraviolet radiation impinging on the paper, it reflects it back as visible light, which can

Optical Brightness 

In General Printing Terms by Inkjet Insight

In papermaking, an increase in the brightness of a paper by means of the addition of fluorescent dyes or other types of optical brighteners.

Out-of-Gamut Alarm

In General Printing Terms by Inkjet Insight

In digital imaging software programs, a feature that alerts the user that a particular color displayed on the video monitor is not one which the electronic color system can output, or is

Out-of-Roundness

In General Printing Terms by Inkjet Insight

A paper web defect characterized by a paper roll that is not perfectly round, caused by storing a roll on its side, excessive clamp pressure, dropping the roll on its side, or

Outline Font

In General Printing Terms by Inkjet Insight

In computerized typography, a font comprising characters described as a series of mathematical descriptions corresponding to curves and lines, as opposed collections of dots (or bit maps). Outline fonts are easily scaled and