3M Micro Finishing Film 100 Micron SiC (PSA)

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3M Micro Finishing Film 100 Micron SiC (PSA)

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.

Silicon carbide particles are longer, thinner, harder and more brittle than aluminium oxide, so they remove material very rapidly at first and then the finish becomes slightly finer as the abrasive 'beds in'.

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: 8-1/2" x 11" (216mm x 279mm)
Grade: 40 micron
Mineral: Silicon Carbide

Customer Reviews

Written by: Mike S
Good but pricey
Bought these to try as a replacement for the 40 micron Alox non-PSA film I've previously used for 'scary' sharpening..

As the description states, the Sic particles abrade fast initially and then less so as the particles wear down. Ideal for flattening tool steel faces/bevels before finer grits.
Written by: Stuart Austin
Peerless currently but expensive
You can flatten soles of planes on good Wet & Dry paper . I get on well finishing the job on this wonderful 3M stuff . Align yourselves in your imagination with Chris Tribe , David Barron and the Barnsley Workshop experts !!
Stuart Austin
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