Red Flag #1: They Quote Without Reading Your Spec
A supplier that sends a price within 2 hours of receiving a 10-line specification email didn't read your spec. They applied a standard markup and a generic price. When you follow up with a question about liner material or MVTR requirements, the price will shift. A thorough quote takes 1–2 business days because it requires: material cost calculation based on your spec, production time estimation, quality control requirements review, and shipping logistics research. Instant quotes are estimates, not commitments.
Red Flag #2: No QC Documentation
Ask: "Can you provide a sample QC report for a recent production batch?" If the answer is "we check everything" without a document, they don't have a formal QC process. A real QC report includes: dimensional measurements (ID, OD, length — actual vs specified), visual inspection results (print registration, color matching), functional test results (cap insertion/extraction force, compression test), and defect rate for the batch. Require this documentation. It's your only evidence that the product you receive matches the product you approved.
Red Flag #3: The Lowest Price by 20%+
The lowest bidder in a packaging RFQ is almost always cutting corners you can't see: thinner paper (fewer plies), lower-grade ink, skipped QC steps, or materials that don't meet the certification they claim. Packaging is a manufacturing business with tight margins — the difference between a $0.30 tube and a $0.45 tube isn't profit, it's materials and process. A price 20% below the field isn't a deal; it's a warning.
Green Flag: They Ask Questions About Your Spec
A good supplier reads your RFQ and responds with: clarifying questions about dimensions, material suggestions based on your product type, questions about your target market (which determines regulatory requirements), a documented quote with line items, and a production timeline. This back-and-forth takes 2–3 business days and is the sign of a supplier who takes your order seriously.
Green Flag: They Offer to Send a Sample Before Production
A supplier who insists on sending an approval sample before they'll accept a production deposit is protecting both of you. The sample proves that the tube they intend to produce matches the tube you think you ordered. If it doesn't, you iterate — at the supplier's cost for a single revision, or at your cost for additional revisions. This step adds 12–15 days but prevents a much more expensive production error.
At Kuzo Packing, we provide: documented QC reports, detailed quotes with 24-hour turnaround, approval samples with every order, and ISO 9001-certified processes. Email support@kuzopacking.com or WhatsApp +86 153-0553-6396.