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Jiangzhi offers various types of surface treatment. Normally, our surface finishing is based on SPI or VDI standards for molded parts. Finishes applied to the surface of the mold cavity transfer to the surface of the molded part. Adding a finish may change the mold price, but won’t influence the unit price. Choose the correct surface based on your own budget.

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SPI mold finishes standard chart

Finish Description Description
A-1 Grade #3 diamond buff for mirror or optical finishes
A-2 Grade #6 diamond buff most time consuming and costly finishes to achieve
A-3 Grade #15 diamond buff steel grade important to results
B-1 600# grit paper removes all tools and machining marks
B-2 400# grit paper provides good mold release
B-3 320# grit paper ligh reflecting finish on molded parts, some sheen
C-1 600 stone removes all tools and machining marks
C-2 400 stone provides good mold release
C-3 320 stone mute finish on molded parts, no sheen
D-1 dry blast glass bead for decorative finishes
D-2 dry blast #240 oxide helos hide shrink mardks and other imperfections
D-3 dry blast #24 oxide dull non-reflecting finish on molded parts
injection moulding spi surface finishing

Common VDI 3400 finish chart

VDI-3400-texture
VDI VALUE Description COMMENTS
VDI 12 600 stone low polish
VDI 15 400 stone low polish
VDI 18 dry blast glass bead satin finish
VDI 21 dry blast #240 oxide dull finish
VDI 24 dry blast #240 oxide dull finish
VDI 27 dry blast #24 oxide dull finish
VDI 30 dry blast #24 oxide dull finish
VDI 33 dry blast #24 oxide dull finish
VDI 36 dry blast #24 oxide dull finish
plastic surface finish chart
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