| 摘要 |
There is disclosed a coated abrasive belt (17, FIG. 4) whose abrasive-particle grit-size, and/or backing material and/or adhesive can be determined by a supervisor or the user while the belt is in use from a color pattern (33, 35) on the belt. The pattern may consist of bands (33, 35) of one or more colors along the non-abrasive back of the belt. It may also include a colored abrasive surface (75, FIG. 5) produced by depositing, during the making of the belt, on the abrasive surface a colored adhesive and/or abrasive particles mixed with a coloring material.
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