Importers who write only “EVA insole” on an RFQ leave process choice to the factory. Cold press vs injection molded insoles change cosmetics, density control and defect modes. Specify the route — or approve it explicitly on the golden sample.
Process comparison
| Topic | Cold press | Injection / one-shot |
|---|---|---|
| Common materials | EVA sheets, fabrics, layered stacks | TPU/EVA compounds suited to molding |
| Look & layers | Multi-layer, fabric tops easy | Integrated shapes, different flash risk |
| QC focus | Bonding, thickness, hardness map | Fill, sink, dimensional stability |
| Private label | Print/deboss on covers | In-mold or post-decor |
Factory context: About Jijia, audit checklist.
What to put on the RFQ
- Preferred process — or “match sample process”
- Target thickness and hardness by zone
- Acceptable cosmetic criteria (flash, gel alignment)
- Packaging after forming
| Parameter | Typical program |
|---|---|
| MOQ | 1,000 pairs per SKU |
| Sample | 5–7 days |
| Bulk | 7–15 days after approval |
FAQ
Which process is “better”?
Neither universally — match the construction you sell. Approve the process on the physical sample.
Can you switch process mid-program?
Treat it as a new qualification — hardness and cosmetics will drift. Freeze before FBA or retail launches.
Where do I send a teardown sample?
Contact · joey@jijiashoes.cn · WhatsApp +86 137 0221 5468.
Share your construction: OEM · Products.
Key Takeaways
- Cold press vs injection changes cosmetics, density control, and defect modes.
- Do not write only ‘EVA insole’ on RFQs — specify or approve process on golden sample.
- Process choice affects tooling, scrap, and QC checkpoints.
- Plan commercial floors early: MOQ 1,000 pairs per SKU, samples about 5–7 days, bulk often 7–15 days after sample approval for Guangzhou OEM programs such as JIJIA Insole Pro.
- Train merchandising so PDP promises match process capabilities.
Importers who omit process choice leave critical decisions to the factory. Cold press and injection molded routes can both produce excellent footbeds — but they fail differently and photograph differently.
Specify the route you need, or explicitly approve the factory’s proposal on the golden sample with photos and hardness maps. JIJIA can discuss process options in OEM briefs; lock the choice before mass artwork and retailer presentations.
B2B Reference Table
| Topic | Cold press notes | Injection notes |
|---|---|---|
| Cosmetics | Process-dependent surfaces | Often different edge/flow cues |
| Density control | Depends on recipe + press | Tooling/process windows |
| Defect modes | Press/trim patterns | Flow/short-shot patterns |
| Tooling | Molds/dies still matter | Cavity investment critical |
| Best buyer habit | Approve on sample | Approve on sample |
| RFQ language | Name process or ‘approve on GS’ | Name process or ‘approve on GS’ |
Commercial floors remain familiar for many programs: 1,000 pairs per SKU, samples ~5–7 days, bulk ~7–15 days after approval. Process changes after golden freeze are expensive — treat them as new developments.
When two factories quote different processes at similar FOB, do not average them — they are different products until golden samples prove otherwise.
Buyer Checklist
- Name process in RFQ or require GS approval
- Photograph edges and surfaces
- Record hardness maps
- Ask scrap/yield assumptions
- Confirm tooling ownership
- Align QC to defect modes
- Freeze process on PO
- Educate merchandising on limits
- Compare quotes with process labeled
- Link to tooling literacy
Related reading: process hub · tooling · OEM · testing · sampling · materials · contact.
Process Approval as a Buying Gate
Cold press and injection routes can both ship excellent insoles. The buyer error is leaving process unnamed until a retailer rejects cosmetics or a QC lab sees unexpected defect modes. Write “process X” or “approve process on golden sample” into the RFQ.
Photograph edges, surfaces, and section cuts during approval. Record hardness maps. Ask factories about scrap assumptions and how defects are dispositioned. When two quotes use different processes, label them as different products in your spreadsheet.
Commercial anchors remain useful planning tools: 1,000 pairs per SKU, samples ~5–7 days, bulk ~7–15 days after approval for many standard programs. Changing process after freeze is a development reset. Merchandising should learn what each process can and cannot promise on PDP.
Pair process literacy with tooling cost and materials guides. EVA vs PU choices and process choices interact — decide them in one engineering meeting, not in separate Slack threads weeks apart.
Process-specific reminder: label cold press versus injection on every quote comparison sheet so you do not negotiate cents across different products.
OEM Execution Notes for Buyers
Translate this article into an RFQ packet before you negotiate. Include channel job, target pair counts by SKU, size curve, material and hardness windows, branding method, pack level, labeling languages, Incoterms, and any retailer substance lists. Attach photos or CAD. Name a single technical owner on the brand side and ask the factory to name one too. Incomplete packets create non-comparable quotes and fake urgency.
During sampling, use written pass/fail criteria: hardness landmarks, thickness maps, bond integrity, logo registration, and pack scan tests where relevant. Approve mid sizes and extreme sizes. Retain golden-sample photos with dates. When something fails, record whether the failure is material, process, artwork, or briefing error — that diagnosis saves the next round.
For commercial planning with Guangzhou OEM partners such as JIJIA Insole Pro, keep the published anchors visible in every internal memo: MOQ 1,000 pairs per SKU, sampling typically about 5–7 days when briefs are complete, and bulk often roughly 7–15 days after sample approval. Special materials, new molds, multilingual kits, or buyer-requested laboratory tests can extend calendars; write those exceptions into the PO timeline instead of discovering them after a launch announcement.
Before bulk release, freeze the BOM and the claim deck together. Reorders should cite golden-sample IDs. If a cover mill, foam lot, or print plate changes, decide in advance whether retesting is mandatory. Connect internal links already listed above to your team wiki so junior buyers do not reinvent process under seasonal pressure. Honest scope beats optimistic screenshots every time.
Before you close the RFQ, run a 15-minute internal readiness review with procurement, quality, and merchandising in the same room (or call). Confirm SKU count, size curve cash, pack languages, banned claims, golden-sample owners, and the ship narrative you will tell sales. If any owner is missing, pause outbound quotes. Mature OEM programs with partners such as JIJIA reward complete briefs with faster sampling — typically about 5–7 days — and clearer bulk planning near 7–15 days after approval at a practical MOQ of 1,000 pairs per SKU. A short readiness review prevents expensive mid-season resets and keeps reorders identical to the story you already sold.
Also archive the final quote PDF, golden-sample photos, and artwork versions in one folder named by SKU and season. Future buyers should be able to reorder without archaeology. That archive is part of quality, not paperwork theater.
FAQ
Which process is better?
Depends on geometry, cosmetics, and volume — approve with samples.
Can we switch later?
Expect re-sample, possible tooling, and timeline reset.
Does process change MOQ?
It can — especially with new cavities; confirm in quote.
What belongs in the RFQ?
Material, hardness, process preference, pack, and size curve.
CTA: Tell us your cosmetic and volume priorities via contact so we can propose a process path on sample.