3. Terminology
3.1 General—Definitions are in accordance with Terminologies
D883 or E631 and D1600, unless otherwise indicated.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 color-hold guidelines—target color regions within a
three-dimensional model which constitute acceptable appearance
retention levels of color change resulting from weathering
of a specific product type and color.
3.2.2 temperate northern climate—in weather testing, a
North American metropolitan area testing site located within
73 to 100° W longitude and 37 to 45° N latitude