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Finishes We Provide

Standard mold finishes are described by SPI standards as shown below.

Large aluminum Mold being polished
Large aluminum Mold being polished
A-1 Grade #1 Diamond Buff
The finest diamond finish, used primarily for finishing plastic injection molds for clear lenses, optics and critical cosmetic parts.
A-2 Grade #6 Diamond Buff
Close to an A-1 diamond, but with less shine. Typically used on plastic injection molds that produce cosmetic parts.
A-3 Grade #12 Diamond Buff
Close to an A-2 diamond, but with less shine. Typically used on plastic injection molds that produce cosmetic parts that don't require a high finish.
B-1 600 Grit Paper
The highest finish before diamond process. Used primarily on highly cosmetic parts that are chrome plated or painted. (Close to A-3 diamond with a directional pattern.)
B-2 400 Grit Paper
Close to a B-1 paper finish, but with a deeper directional pattern. Less shine than a 600-paper finish.
B-3 320 Grit Paper
Almost like a B-2 paper finish, but with a slightly deeper directional pattern.
B-4 240 Grit Paper
Deeper directional pattern than 320 paper finish. Typically used after stone for ease of finishing and appearance.
B-5 180 Grit Paper
Deeper directional pattern than 240 paper finish. Typically used after stone for ease of finishing and appearance.
Important Note:
Please keep in mind that Paper grit finishes are not equivalent to their Stone counterparts. (Example: A 320 paper finish = approx. a 600 stone finish, 320 paper is twice as fine as 320 stone.)
Large aluminum Mold being polished
Large aluminum Mold being polished
C-1 600 Stone Finish
Fine smooth finish, mainly used on small detailed areas where paper finish is not feasible.
C-2 400 Stone Finish
Slightly rougher finish than 600 stone. Mainly used for removal of fine machined finishes, where rougher stones may not be necessary to use.
C-3 320 Stone Finish
General purpose starting and finishing stone to remove machined finished.
C-4 220 Stone Finish
General purpose starting stone to remove rougher machined finishes. Results in a rougher finish compared to a 320 stone and may also be used for a final finish on specific applications.
C-5 150 Stone Finish
Mostly used to remove very rough machined finishes.
Dry Blast Finishes
Dry blast finishes may vary due to material blasted, the amount of pressure used and the distance from which the blast is applied. Keep in mind that blasted material will break down and cannot be used indefinitely to achieve same results at given specification.
TS7 5183 Ultra

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