Literature and Previous Studies:

Documentation on machine engraving of platinum seamless bands is comparatively sparse. In 1978, Roy Rushforth of JML Research described detailed machining conditions to achieve reduced tool wear cutting platinum alloys. He noted the poor performance of conventional tools when applying standard gold machining techniques. Figure 2 depicts deep, bright surface faceting achieved in platinum.

A section of literature contained in the 1990 publication, An Introduction of Platinum by JML, described the chip formation process and related machining parameters, tooling, and lubricants to surface finish with limited discussion of engraving methods. Figure 3 provides an illustration of details.

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Figure 1

Figure 2