If you are still using the same finishing stones that you have always used you may not be taking full advantage of the latest in abrasive technology. Today's porcelains are softer and finer than the glasses we used just a few years ago, and modern pressable ceramics have grain structures requiring different tools and instruments to reduce the likelihood of crack propagation.
Samurai Green Stones ($49.99 per 100)
These are high-quality, high-purity silicone carbide grinding stones that have been specially formulated for use with today's low-fusing and pressable ceramics. Overly hard stones designed to cut old-fashioned feldspathic porcelain can cut too fast, forming micro-cracks called "Griffith flaws." These micro-cracks may ultimately lead to failure of the porcelain or ceramic substructure.
Samurai Blue Stones ($49.99 per 100)
Unlike finishing stones formulated for ceramics, abrasive stones and wheels designed for chrome and nickel alloys need sufficient hardness for penetrating castings with Brinell Hardness ratings of 225 or higher. At the same time, the stones must shed enough surface material to stay cool and avoid galling the coping or framework.
Samurai Pink Stones ($49.99 per 100)
Manufactured from pure coral colored aluminum oxide, these stones are designed to provide a smooth satin texture on all noble and high-noble alloys including yellow crown and bridge metals, and popular palladium alloys. Ideal grain size and shape, combined with an inert non-contaminating binder provide technicians with a surface free of grooves, gouges and "folds" which can cause porcelain bubbles and defects.