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FAQ

  • Are you a real factory or a trading company?

    We are a 100% self-operated silicone factory with in-house mold making, compression molding, LSR injection, and finishing capabilities — full vertical integration from raw material to finished goods. Unlike trading companies that outsource production, we control every step. The quickest way to verify is to request a live video tour of our production floor or schedule an on-site factory audit.
  • How can I verify your certifications are authentic?

    Ask us for the issuing body and certificate number, then verify through official channels (e.g., checkBSCI or ISO 9001 on the registrar‘s database, or confirm FDA registration on the FDA’s official website). We can also provide third-party lab reports from Eurofin, Intertek, or TÜV Rheinland with sample matching your exact product specifications.
  • Do you hold ISO 9001 / BSCI?

    Yes. ISO 9001 applies across all our production lines. And BSCI as well
  • What is the difference between FDA and LFGB certification?

    FDA 21 CFR 177.2600 is the baseline for the U.S. market — it requires extractables testing under food-contact conditions. LFGB (§30 & §31) is the stricter German standard adopted across the EU: it mandates sensory testing (odor and taste transfer) in addition to migration limits, and requires platinum-cured silicone. LFGB-certified silicone is considered higher quality and typically costs 5-10% more than FDA-only material.
  • Which certification do I need for my target market?

    - **United States**: FDA 21 CFR 177.2600 + California Proposition 65 (chemical safety)
    - **European Union**: LFGB (Germany, de facto EU premium) or EU 1935/2004 + 2023/2006 framework
    - **Global chemical compliance**: RoHS (6 hazardous substances) and REACH (SVHC list)
     
    Products that pass LFGB automatically meet FDA requirements for chemical safety, but the reverse is not true.
  • What is platinum-cured vs. peroxide-cured silicone? Which one should I choose?

    Platinum (addition) cure uses no peroxide residues, produces no odor, and passes LFGB sensory tests — required for food-grade, medical, and baby products. Peroxide cure costs less but leaves residual odor and byproducts that require extended post-curing to remove; it fails LFGB sensory panels even if FDA migration limits are met.
  • What information do you need to provide a quote?

    Send us 2D and 3D CAD files (STP, IGES, STL, or PDF), target hardness (Shore A), color (Pantone code), order quantity, and any industry-specific requirements. Our project engineers will perform Design for Manufacturing (DFM) analysis and return a complete proposal covering mold design, lead time, and cost breakdown.
  • What is MOQ and why do custom silicone products have one?

    MOQ (Minimum Order Quantity) covers fixed costs that don‘t scale linearly with volume: tooling (mold fabrication costs $500-$5,000+), material procurement (raw silicone is sold in minimum lot sizes), machine setup, color mixing, and quality testing. For custom-molded parts, MOQ typically ranges from 1,000-10,000 pieces, but stock items or low-complexity designs may have lower thresholds. Small-batch prototyping is also available upon request.
  • Can you lower the MOQ for a trial order?

    Yes — we accept trial orders and small-batch prototyping. However, lower quantities increase per-unit pricing because fixed costs (mold amortization, setup time) are spread over fewer pieces. We can also discuss sample-only agreements before committing to full production runs.
  • How do I start a custom silicone project?

    Step-by-step: (1) Submit design files → (2) DFM analysis + quote → (3) Mold fabrication (20-40 days) → (4) Sample production and approval → (5) Mass production → (6) Quality inspection → (7) Shipment. Pre-production samples are always provided for your confirmation before bulk manufacturing.

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eva@yjzensun.com
+86-13751622398
+86-662-3339807
No. 12-3,Xinjiang Bei Road, Jiangcheng, Yangjiang ,Guangdong
 

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