• Quality is the Language of B2B

    At Guan International, we don't just supply teaware; we supply certainty. Explore our rigorous QC protocols and verified shipment records.

    100%

    Material Food-Grade

    <0.5%

    AQL Defect Rate

    24h

    QC Feedback Loop

    12+

    Compliance Certs

  • How We Mitigate Your Risk

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    1. Incoming QC (IQC)

    Every batch of stainless steel (SS304/316) or borosilicate glass is tested for purity before production begins.
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    2. In-Process QC

    On-site inspectors check the first-off samples and monitor the assembly line every 2 hours.
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    3. Final Pre-shipment

    AQL 2.5/4.0 standards applied. We simulate shipping conditions to ensure packaging survives the journey.

  • Your Concerns, Answered

    Can I send my own QC agent?

    Absolutely. We welcome 3rd-party inspections from SGS, V-Trust, or your local agent. We provide a dedicated QC room for their work.

    What if I find defects after delivery?

    Guan International offers a 1:1 replacement guarantee for any manufacturing defects found within 90 days of arrival.

    How do you protect my custom designs?

    We sign strict NDA agreements and have a "no-leak" policy. Your custom molds and logos are used exclusively for your orders.

    Are your materials truly food-grade?

    Yes. Every shipment is accompanied by a material certificate. Our products comply with FDA, LFGB, and REACH standards.

  • Rigorous Inspection at Every Step

    1

    Incoming Material Inspection (IQC)

    Every batch of raw materials is tested before production begins.
    Glass Materials
    Thermal shock testing (-20°C to 150°C), thickness measurement, clarity inspection
    Ceramic Materials
    Lead & cadmium migration tests, water absorption rate, glaze consistency
    Stainless Steel
    Material grade verification (SS304/316), corrosion resistance, surface finish
    Bamboo/Wood
    Moisture content check (8-12%), formaldehyde testing, grain quality
    2

    In-Process Quality Control (IPQC)

    Continuous monitoring throughout production to catch issues early.
    First Article Inspection
    Every production run starts with 5-piece approval before mass production
    Hourly Patrol
    QC inspectors check every 2 hours on the assembly line
    Critical Control Points
    Glass: sealing integrity, rim smoothness | Ceramic: glaze consistency, decal alignment | Metal: welding strength, surface finish
    3

    Final Quality Control (FQC)

    Comprehensive pre-shipment inspection ensures only perfect products ship.
    AQL Standard
    AQL 2.5 for critical defects, AQL 4.0 for minor defects
    Drop Test
    Random samples from each batch: 1.2m drop onto concrete (3 drops per orientation)
    Packaging Inspection
    Carton strength, cushioning adequacy, labeling accuracy
    Pre-shipment Report
    Photo documentation + inspection certificate provided

  • Certifications & Test Reports

    All products comply with international food safety and quality standards.

    🇩🇪

    LFGB

    Germany Food Safety
    Valid until: Dec 2026

    🇺🇸

    FDA

    USA Food Contact
    Valid until: Oct 2026

    🌍

    HACCP

    Food Safety Management
    Valid until: Jun 2027

    📋

    ISO 9001

    Quality Management
    Valid until: Mar 2027

    👥

    BSCI

    Social Compliance
    Valid until: Nov 2026

    🧪

    REACH

    Chemical Safety (EU)
    Ongoing Compliance

  • Our Guarantee

    2-Year Manufacturing Warranty

    Warranty Coverage
    Material defects (cracking, corrosion, delamination)
    Workmanship issues (leaking, structural failure)
    Print/decal peeling within warranty period
    Glaze defects (crazing, peeling, discoloration)
    Manufacturing flaws (uneven rims, poor sealing)
    Not Covered:
    Normal wear and tear
    Misuse or abuse (drops, impacts)
    Commercial dishwasher damage (unless specified)
    Microwave damage (unless certified)
    Improper storage or handling
    Claims Process
    Submit claim with photos/videos within 90 days of arrival
    We review within 48 hours
    Approved claims: 1:1 replacement with next order OR credit note
    Critical issues: Air freight replacement at our cost
    Documentation: Claim form + evidence + batch number
    Response Time:
    Initial response: 48 hours
    Investigation: 3-5 business days
    Resolution: 7-10 business days
    Replacement: With next production run or air freight
    "We take the risk, so you don't have to. If there's ever a valid quality complaint, we assume full responsibility. Full refund or free replacements—no excuses."
    — Vivi Xu, Founder, Guan International

  • Request Quality Documentation

    Download our complete quality manual, certification pack, and guarantee letter.

  • We don't just supply teapots

    we provide a complete culture. Explore our curated collections for different markets

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