Metal Finishing Guide Book


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Page 38 of 903

Fig. 1. Sisal buffs. BUFF TREATMENTS Treatments may be applied to fabrics (mill treatment) or to the buff after assembly (dip treatment). Buff fabrics are frequently hardened and stiffened to promote faster cutting, softened for additional flexibility to conform to contours, strengthened for longer buff life, or lubricated to prevent burning. Buff fabrics may also be treated to provide improved adhesion of buffing compound, to abrade for heavier cut, or to flameproof and make fire resistant. Treatments must be applied evenly and uniformly to avoid creating hard spots that cause uneven buffing. The treatment must not deteriorate with buff age. Unsuccessful treatments weaken the cloth and decrease buff life. CONVENTIONAL, FULL-DISK BUFF DESIGNS Unsewn Buffs Conventional, full-disk buffs are made with die-cut cloth disks. Unsewn, conventional full-disk buffs may be used for luster (Fig. 2). Loose disks are turned to allow the threads of the material to lie in different directions. This results in more even wear, avoiding a square shape after being put into use. One disadvantage of this conventional design is that the fabric can fray or ravel. When held against a wheel 35

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