Abstract
The Logitech concern of Scotland has developed an automatic system that will enable technicians to treble their output of 30‐micron rock sections for geological research. The system revolves around a Logitech Model LP 30 production lapping machine with a capacity for lapping at three work stations providing facilities for automatic feed of abrasives, variable speed control and vacuum supply for vacuum chuck location of specimens. Three sets of conditioning/retaining rings and flat pressure blocks are used for primary thinning and flat lapping of unmounted rock slices. The lapped slices, typically of 2mm thickness, are cemented to glass microscope slides of uniform lapped thickness by means of a special bonding jig so that the cement layer thickness is of the order of one micron.
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