SPI Guidelines Chart

SPI Finish Guide Typical Applications
A-1 Grade #3 Diamond Lens / Mirror – requires 420 SS material
A-2 Grade #6 Diamond High Polish parts
A-3 Grade #15 Diamond High Polish parts
B-1 600 Grit paper Medium Polish parts
B-2 400 Grit paper Medium Polish
B-3 320 Grit paper Med – Low polish
C-1 600 Stone Low Polish parts
C-2 400 Stone Low Polish parts
C-3 320 Stone Low Polish parts
D-1 Dry Blast Glass Bead Satin finish
D-2 Dry Blast # 240 Oxide Dull Finish
D-3 Dry Blast # 24 Oxide Dull finish

 

You can order an SPI plastic molded sample plaque chart by contacting us at info@sftusa.com.