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Glossary is usually defined as an alphabetical list of technical terms in some specialized field of knowledge. This knowledge base glossary provides a collection of knowledge base documents that define many technical terms. These terms are arranged alphabetically, but you can quickly jump to a specific term by selecting its first letter from the index of the knowledge base glossary below.
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Identifies the settings on the instrument. These include: • Measurement type (reflectance or transmittance) • Aperture Size • Specular Port position (Specular Included or Specular Excluded) • Position of adjustable UV filter
Identifies the source of the spectral data for the sample.
Two samples which match under one set of conditions but no longer match on changing one or more of the conditions.
A pair of colors that match under one or more sets of conditions but differ markedly in color if you change one or more of the conditions. A phenomenon exhibited by a pair of colors that only match under one set of viewing conditions. A metameric pair of samples have the same tristimulus values for a specific set of viewing conditions but have different reflectance curves.
A metamerism index is used to quantify the amount or degree of metamerism that exists between two samples. It takes into account the color difference between two samples, under two different Illuminant/Observer conditions.
A finished sample containing a specific concentration of color. The measurement of the sample, the concentration of color, and other information about the sample is entered using Colorant Set Maintenance. This information is used to calculate the optical data for the color. This sample can also be referred to as a "primary".
A module contains pre-selected answers to the fields appearing on Ingredient Selection screen. If you frequently use the same ingredient selections, number of colorants in formula, etc., you can create a module that automatically makes those selections. Using a module reduces the input for each match or correction, and reduces the possibility of input errors.
Reflectance data of a dyestuff is manipulated for a non-linear build-up of K/S. It is used when an error in making a sample or contamination causes the build-up curve to dip and divert in the opposite direction to the general trend. Monotone means keeping the same slope as the general trend.
One billionth of a meter (10-9). It is also known as a millimicron. It is used to measure the wavelengths of energy found in the electro-magnetic spectrum. Wavelengths of energy in the form of visible light measure from 400 – 700 nanometers.
Descriptive of a match that is commercially unacceptable.
A general term used to describe the degree to which a material obscures a substrate. It is the opposite of ‘translucency’, the degree to which a material does not obscure a substrate. Opacity and/or translucency are measured in terms of a contrast ratio.
Adjective used to describe complete opacity.
In textile formulation software, the operation specifies the sequence of action to be done during the dyeing. Actions may be parameters (e.g., temperature, volume,)or products (e.g., chemicals, etc.).
An ingredient that fluoresces. When this happens, the ingredient absorbs light at a specific wavelength in the ultra violet range of the spectrum, and re-emits it at a wavelength in the visible spectrum. The energy is usually re-emitted at the shorter wavelengths of the visible spectrum (i.e., in the blue region of the visible spectrum), and the resulting effect is that the material displays brighter, bluer, or ‘whiter than white’. Also referred to as a fluorescent agent or fluorescent brightener.
Also referred to as optical data / optical properties. A numerical description of the way an ingredient interacts with light. Optical data is typically generated for colorants, but may also be calculated for other ingredient types such as resins, depending on the ingredient composition. Optical data can be expressed using the following terms: • K(absorption) and S(scattering)values • K/S values • A(absorbance) The same colorant used in different product lines may generate different optical data.
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