Audit a Tape Converter in China: Ten Checks Before You Tool

Technical guidesPublished 07 November 2026Updated 07 November 2026

Ten checks decide whether the tape converter you are about to tool with owns its process end to end: which machines stand in the building, what an incoming lot number resolves to, and what gets written down while your order runs. Run them on a visit or on a video call, in this order, and ask each company, including us, to answer in documents rather than adjectives. Each item below is written as what to ask, why to ask it, and what our answer looks like.

1. Which machines do you own?

Ask for the equipment list, then ask to see the machines working, not switched off for the tour. Why: rented hours or outsourced steps put your order in somebody else's queue, and the queue owner sets your priority. Our answer: slitting, rewinding, lamination and flat-bed, rotary, laser and CNC die-cutting run inside our own 3,000 m² plant in Shenzhen; the factory page names the routes we operate.

2. Who sets and runs the machine on my order?

Ask whether an in-house operator sets the job or whether you will be told "our partner runs that step." Why: setup knowledge lives with the person who has burned their hands on that material, and a tape converter running rented hours cannot produce that person for your audit. Our answer: your order is set and run by our own machine operators, and setup parameters go on the work order.

3. What does a lot number resolve to?

Ask them to follow one real lot number from a finished roll back through their system, out loud. Why: if "batch" resolves only to a purchase order, you have purchasing records, not process records. Our answer: a lot traces to the incoming material lot, the adhesive or stock lot it came from, the slitting date and the inspection record; the system behind those links is on our quality page.

4. Which steps happen inside the building?

Ask them to draw the route of one part on one sheet: receive, slit, laminate, cut, inspect, pack. Any step that leaves the building gets marked. Why: each outbound step is a second trace archive you do not control. Our answer: converting steps are in-house; we buy coated stock, not converting labour.

5. Where do branded materials come from?

Ask whether tesa, 3M or Sekisui stock is bought through channels that let the supplier name the material's origin, and what the authorization actually covers. Why: provenance decides aging behaviour and your customs paperwork, and "we sell all brands" answers neither. Our answer: we supply and convert these materials in-house, authorization scope confirmed per enquiry, brand, market and product family, stated on the authorization page.

6. How is a first article recorded?

Ask for a first-article report from a job like yours, with the drawing it was measured against. Why: an FAI that is not tied to your drawing proves nothing about your part. Our answer: FAI reports are issued per drawing project, with dimensional and visual checks, and the report is kept with the production record for that lot.

7. What happens when the incoming film changes revision?

Ask for the change-control rule in writing: who notifies you, and whether requalification is offered or only accepted if you demand it. Why: silent revision changes are the most common root cause in bond-line complaints that surface months after a smooth launch. Our answer: material or process changes on a live part are confirmed with the buyer before they ship, and timing is settled at quotation.

8. Is the sample made the way production will be?

Ask a tape converter which route the sample came from and whether production repeats it. Why: a laser prototype against rotary production is two different edge qualities on one part number. Our answer: prototype quantities available; production quantities agreed per part; and where the production route differs from the prototype route, the drawing review says so before tooling is cut.

9. What does the certificate actually cover?

Ask which scope the quality certificate names: sites, activities, and whether your part's steps fall inside it. Why: a certificate for a site that does not include your process step is a framing problem, not an assurance. Our answer: ISO 9001, certificate and audit scope provided on request, covering this Shenzhen plant and the converting operations listed on our services overview.

10. What changed after the last complaint?

Ask for one real failure and what the process changed afterwards. Why: a tape converter with no complaint history either has no records or no customers, and both answers matter. Our answer: the review reopens layer stack, surface prep and cutting route, and the next sample states which variable moved. This is the question that tells you more than any tour.

The document pack to request at the first meeting

• Equipment list with the machines you will see on the audit
• One traceability example, followed live from a finished lot
• First-article report format against a customer drawing
• Change-control rule for material revisions and route changes
• Authorization or channel scope, per brand, market and product family
• TDS, MSDS, RoHS and REACH statements for the grades actually ordered, and the audit scope of the ISO 9001 certificate

Checks 3 and 7 are the two that cannot be retrofitted after a launch: the trace chain and the change rule. Everything else can be rebuilt from paperwork; those two are built, or they are not.

Commercial and process terms on this page are the questions a converter has to answer, not a standing offer. Order quantities, lead times, tooling charges, sample terms, freight and payment structures are confirmed at quotation against your drawing, your material and your destination, and only figures already published elsewhere on this site are stated as commitments.