SPI vs Ra?
Molding quotes use SPI or mold texture codes; convert Ra with care.
Surface and material
SPI Finish, Texture, and Material on the Same RFQ
SPI A grades on FR PC/ABS often need texture or lower gloss to hide weld lines.
Surface and material
Finish and fill interact
Glass-filled and FR grades show streaks on high gloss SPI finishes.
SPI A grades on FR PC/ABS often need texture or lower gloss to hide weld lines.
Material notes and SPI callouts on different documents cause molder teams to optimize only one side.
Put SPI class, texture code, and resin on the same RFQ block.
Quote checklist
Surface block
Copy these fields into your RFQ or instant quote notes.
SPI or texture code per face
Resin grade on same page
Cosmetic vs non-cosmetic faces marked
Draft angles for texture depth
Examples
Mismatch examples
Weak callouts widen assumptions; specific grades tighten quotes.
| Field | Too vague | Better |
|---|---|---|
| SPI A2 + GF30 | High gloss + glass | Expect fiber show; plan texture |
| SPI B + FR ABS | Moderate gloss | Weld line plan needed |
| Texture MT11010 + PP | Matte hide | Common appliance route |
Instant quote
Single RFQ block
NetProto quote flow: upload, specify assumptions, review, submit.
- 1
Copy SPI table from drawing
Into quote notes.
- 2
Paste material line
Below SPI block.
- 3
Upload texture swatch
If corporate standard.
- 4
Review DFM cosmetic flags
Before tooling release.
FAQ
FAQ
Paint after mold?
Note paint line separately; SPI may be lower on hidden faces.
Filled resin polish?
Higher mold wear; specify maintenance expectations qualitatively.
Related
More RFQ guides
Links render in cards blocks only.
Surface finish design guide
DFM spoke.
Surface finish design guideGF loading guide
Surface on filled grades.
GF loading guideInstant quote
Upload CAD.
Instant quoteNext step
Start with CAD and material notes
Use the instant quote platform for pricing visibility tied to your geometry.