Metameric Color Match

A color match between two materials in which the colors are identical under some lighting conditions but not under others. Metameric color matches are common when different pigments or dyestuffs are used to color the two materials.

Metameric match

A match that isjudged to be satisfactory under a particular illuminant but not under illuminants of different spectral compositions.

Metamerism

A phenomenon whereby the nature of the colour difference between two similarly coloured objects changes with change in the spectral distribution (characteristics) of the illuminant.
Note 1.. Metanierism is most frequently seen when two coloured objects match in daylight, but differ markedly in colour when viewed in tungsten-filament light. This arises because the visible absorption spectra of the two objects differ significantly, although the tristimulus values in daylight are identical.
Note 2.. This term is often used loosely to describe the behaviour of a single coloured object that shows a marked change of colour as the illuminant changes, but this effect is properly described as lack of colour constancy.

Metap Weave-Knit Process

A technique combining weaving and knitting in one operation with two independent yarn systems wound on warp beams. In the fabrics produced woven strips are linked together with wales of stitches. Generally the fabrics have 75-85% woven and 25-15% knitted structure.

Metering Pump

A positive displacement device that pumps a measured amount of polymer solution to the spinnerets.

Metier

The bank of cells or compartments used in the dry-spinning of cellulose ethanoate (cellulose acetate).

Metier Twist

The amount of twist present in yarn wound at the metier.

Metric Count

The number of kilometers per kilogram of yarn.

Microdenier

Refers to fibers having less than 1 denier per filament or 0.1 tex per filament.

Microencapsulation

Enclosing materials in capsules of less than one micron to over 2000 microns in diameter. These can contain polymer additives that can then be released under certain conditions of use or processing.

Microfabric

A fabric composed of microfibres or microfilaments.

Microfiber

1. A fibre or filament of linear density below approximately 1 decitex.
Note 1: For glass and other mineral fibres see definition 2 below.
Note 2.. Some commercial fibres as coarse as 1.3 decitex are classified as microfibres by their producer.
Note 3: Fibres finer than approximately 0.2 decitex are sometimes referred to as 'ultra-fine fibres' or 'ultra-fine microfibres'.(See also bicomponent fibre, Note 3.)
2. (Glass and other manufactured mineral fibres) A fibre or filament of thickness less than approximately 3 microns (gm).

Microfibre

1. A fibre or filament of linear density below approximately 1 decitex.
Note 1: For glass and other mineral fibres see definition 2 below.
Note 2.. Some commercial fibres as coarse as 1.3 decitex are classified as microfibres by their producer.
Note 3: Fibres finer than approximately 0.2 decitex are sometimes referred to as 'ultra-fine fibres' or 'ultra-fine microfibres'.(See also bicomponent fibre, Note 3.)
2. (Glass and other manufactured mineral fibres) A fibre or filament of thickness less than approximately 3 microns (gm).

Microfibril

A nonwoven formed by the bonding of a web made by the fibrillation of an extruded film by the rapid evaporation of solvent

Micromesh (weft knitting)

A ladder resistant construction use d in women's fine gauge hosiery containing tuck stitches which spiral around the leg thus reducing the reflectance and producing an attractive appearance. The tuck stitches occur at every alternate course and, in the case of 3x I micro inch, they occur at every fourth wale.