3M™ Micro Finishing Film 100 Micron AO (PSA)

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3M PSA adhesive backed Microfinishing Film is essentially a heavier duty version of imperial lapping film with a slightly thicker film backing and a harder compound of bonding resin.

Aluminium oxide particles are more pebble-like than silicon carbide particles so they don't fracture as easily and last longer.

A high-strength polyester film backing is coated with premium, micron-graded mineral particles that are electrostatically oriented for greater cutting efficiency. The particles are bonded into a layer of resin that wears away slowly for increased durability.

PSA is the acronym for Pressure Sensitive Adhesive and is a heavy duty version of the adhesive on the back of a Post-It note.

To use, cut each sheet into the desired width, peel the backing and fix a strip of each grade next to each other on a piece of float glass or other perfectly flat substrate applying firm pressure for an even secure bond.

Sheet size: 8½" x 11" (216mm x 279mm)

Grade: 100 micron

Mineral: Aluminium Oxide

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  • 4
    Perfect for initial flattening of plane soles

    Posted by Guest on 2nd Sep 2015

    Our students here at Waters and Acland will all remember the days flattening planes with 100 micron laid onto thick float glass. Highly recommended for initial flattening.

  • 5
    Great for lapping chisel and plane irons.

    Posted by Chris Tribe on 2nd Dec 2014

    On my courses I have previously used wet and dry abrasive on float class for flattening the backs of chisels and plane irons. This stuff is a big impovement, it lasts longer and cuts ferociously. Highly recommended.