| TYPE OF FINISH | PART-ICAL SIZE | CURRENT SPI FINISH NUMBERS | DESCRIPTION | PREVIOUS SPI FINISH NUMBER |
|---|---|---|---|---|
| “HIGH POLISH” DIAMOND BUFF FINISHES | #3 #6 #15 | A1 A2 A3 | IS COMPARABLE TO IS SLIGHTLY FINER THAN HAS MORE IMPERFECTIONS THAN | #1 #2 #2 |
| “PAPER FINISHES” | 600 400, 320 | B1 B2 B3 | IS FINER THAN IS SLIGHTLY FINER THAN IS COMPARABLE TO | #3 #3 #3 |
| “STONE FINISHES” | 600 400 320 | C1 C2 C3 | IS FINER THAN IS SLIGHTLY FINER THAN IS COMPARABLE TO | #4 #4 #4 |
| “DRY BLASTED” FINISHES | #11* #240Ψ #24Ψ | D1 D2 D3 | IS FINER THAN IS COMPARABLE TO IS A LITTLE MORE COARSE THAN | #5 #5 #5 |
There are no new finishes that are comparable to the old #6 finish. The #6 blast process had the potential of deteriorating mold-parting lines, inserts, pockets, etc. It is suggested if the #6 level of coarseness is desired it would be best to evaluate a photo etch texturing process, or EDM finish equivalent.
* glass bead mesh size
Ψ oxide mesh size
