Muslin Buff — Soft Polishing Wheel for Final Finish
Muslin Buff — Soft Polishing Wheel for Final Finish
Loosely stitched cotton wheel charged with fine compound for the last pass on metal and gems
A muslin buff is a polishing wheel built from layers of loosely stitched muslin cloth, used with fine abrasive compounds for the final pass on jewellery and lapidary work. Muslin's open weave gives the buff a soft, conforming face that flows over curved surfaces, contoured castings, and cabochon domes without rounding facets or flattening fine detail. It is the last buff most jewellers reach for before a finished piece leaves the bench.
Construction
Buffs are stacked from circular muslin discs sewn together near the centre to form a wheel two to six inches in diameter. The number of layers and the spacing of the stitching determine softness: more stitching produces a firmer wheel that holds compound and works flat surfaces; less stitching gives a fluffier wheel that conforms to complex shapes. The bore is reinforced for mounting on a tapered spindle or a flange-and-nut arrangement on a polishing motor.
Use and compounds
The buff is charged by holding a stick of compound against the spinning face for a few seconds. Common compounds for jewellery work are rouge (iron oxide) for a high-shine on gold and silver, white diamond compound for harder alloys, and zam for setting work. For gemstones, finer abrasives are used: cerium oxide for quartz and glass, tin oxide for harder stones, and graded diamond pastes for the highest finish.
Speed and pressure are kept low. Excessive heat builds up under aggressive buffing and can damage soft gems, soften solder joints, or melt thin claws. The work is moved across the buff rather than held in one spot. Gems sensitive to thermal shock — opal, emerald, tanzanite — are buffed only briefly and at reduced speed.
Care and replacement
Muslin buffs load with compound and metal swarf as they are used and become progressively less effective. Raking with a buff rake exposes fresh fibre and extends life, but eventually the wheel is replaced. Each compound should have its own dedicated buff — mixing rouge and white diamond on one wheel contaminates both and degrades final finish.