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Gloss differences

Are gloss differences between the color standard and the color match trial affecting the way the color is being perceived ... [Pg.72]

ASTM (1985). American Society for Testing and Materials, colour and appearance measurement, standard method for visual evaluation of gloss differences between surfaces of similar appearance. Philadelphia ASTM D 4449-85. [Pg.30]

Gloss is important to make a careful evaluation of the situation. Temperature or pressure too low will not allow the area to be packed out properly and can cause low or difference in gloss at two melt fronts. Improper vents around parting lines, on ejector pins, and on lifters can cause gas to come to the surface of the part and will give it a gloss difference. [Pg.103]

Gloss differences are caused by the differing replication behaviors of the plastic material on the mold wall. This can be caused by different cooling conditions or by shrinkage differences. Figure 2.108 shows two typical examples of surface errors due to gloss differences. [Pg.431]

FIGURE 2.108 Gloss differences on molded plastic parts... [Pg.431]

Gate Leaching in the gate area Enlarged tear point. Gloss difference... [Pg.672]

Weld line areas Material removal in the weld line area Gloss differences... [Pg.672]

Cavity surface Formation of coatings on the mold surface, matte polishes, pitting Gloss differences up to the so called orange peel ... [Pg.676]

Stretching of already cooled areas (e g., due to warpage) can be another reason for gloss differences. Various examples of gloss related defects are shown in Figure 9.14. [Pg.190]

Top left Gloss differences near weld lines Top right Gloss differences due to wall thickness variations Bottom left Glass differences near ribs... [Pg.190]

Ejector marks are depressions or elevations on the ejector side of the moulded part surface. These wall thickness variations can cause gloss differences and depressions on the visible surface of the moulding as shown in Figure 9.31. [Pg.197]

Figure 11 shows how the gloss difference between near gate and end of flow molding conditions is significantly reduced for the new generation of low gloss ABS material. [Pg.1995]

See other pages where Gloss differences is mentioned: [Pg.3291]    [Pg.27]    [Pg.228]    [Pg.1454]    [Pg.1456]    [Pg.89]    [Pg.103]    [Pg.104]    [Pg.431]    [Pg.432]    [Pg.684]    [Pg.504]    [Pg.163]    [Pg.170]    [Pg.171]    [Pg.189]    [Pg.189]    [Pg.190]    [Pg.197]    [Pg.273]    [Pg.369]   
See also in sourсe #XX -- [ Pg.647 ]

See also in sourсe #XX -- [ Pg.170 , Pg.171 , Pg.189 ]



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