This standard is issued under the fixed designation D ; the number 1 This test method is under the jurisdiction of ASTM Committee D20 on Plastics. Buy ASTM D TEST METHOD FOR COLOR DETERMINATION OF PLASTIC PELLETS from SAI Global. Color Analysis Hunter Lab CIE Lab ASTM D ASTM E ASTM E
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If there are no material specifications, then default conditions apply.
The measurement is made on pellets and based on tristimulus values obtained with a spectrophotometer or colorimeter. Color measurements can be useful for comparing resins in pellet form when all samples are similar in shape and size.
Any test specimen preparation, conditioning, dimensions, or testing parameters, or a combination thereof, covered in the materials specification shall take precedence over those mentioned in this test method. This will result in differences in pellet opacity. The test method shall be used only to compare specimens of similar pellet shape, size, texture, and degree of translucency. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The pellet shape is independent of the crystallinity of the material.
Color Analysis ASTM D E E
This variation in the cooling of the pellets can result in different levels of crystallinity in the pellets only. The values given in parentheses are for information only. For example, compare translucent disc-shaped pellets to translucent disc-shaped pellets, not with astj, rectangular shaped pellets. More crystalline nylons will be more opaque than amorphous nylons. Historical Version s – view previous versions of standard.
This variation in pellet appearance, due to varying levels of crystallinity, does not affect final properties. Some materials, such as polyamide nylonatm be cooled very differently during the production of the pellets.
This test method should not be used for general material specifications.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Link to Active This link will always route to the current Active version of the standard.
It is possible that each material will have unique characteristics that determine the color values. Work Item s – proposed revisions of this standard.