Before you order reflective roll goods, ask for a data sheet and test report naming the construction on your quotation, send ten questions whose honest answer contains a trade-off, and place a deliberately small first order at your real width before committing to a container. Someone who has run the material will tell you what they cannot confirm and why; someone who has only sold it will agree with whatever you propose.
The ten questions to send with your enquiry
Send these ten questions with the enquiry; each has an honest answer that names a limit.
- “Which construction, layer by layer, does this quotation cover?” Every other answer hangs off this one.
- “Is the metal layer exposed or buried?” It decides abrasion, oxidation in storage, and which face goes toward the heat or the plant.
- “What is the second face, and why that one?” The reason should match your process.
- “What happens to the emboss if I laminate this again?” A heated nip can flatten a pattern.
- “Which way does the scrim run, and what does that do to tear?” Warp and weft tear differently.
- “What does the material do at my process temperature?” The good reply asks questions back first.
- “What master width does this run on, how does my width nest, and where is slit width measured?” Trim waste is in your price; edge and centre can differ.
- “How many splices per roll, and how are they flagged?” An unflagged splice stops a line.
- “Which way is it wound, and what are core ID, roll OD and roll weight?” Your unwind sets these.
- “How do you hold shade between batches, and is the batch code on the label?” Shade drift on white, black and coloured film is a common claim.
Only whoever ran the slitter can answer the last four.
What to ask for in writing, and what each document proves
A document is only evidence if it names the construction you were quoted; anything else is letterhead.
- A technical data sheet. It should name each layer: base film and gauge, metallising or foil layer, topcoat, adhesive, second face, width and roll length. A TDS headed only “reflective mylar film” is worthless: that phrase covers a dozen different materials.
- A test report. Check the tested construction, laboratory and date before the result. For tent liners, enclosures and insulation that usually means a flame test under your market’s standard (CPAI-84, NFPA 701 or EN 13501-1), run on the laminate as supplied. A report on the base PET says nothing about the laminate; one on a finished tent or wall build-up does not cover the roll good on its own. Is mylar film fire retardant? explains why.
- A declaration against a named regulation. A usable one names the regulation and its version or annex, the scope covered, the construction it applies to, a date and a signatory. “Eco-friendly” and “non-toxic” are not regulatory statements.
Apply the same test to our certifications page: check which construction each document actually names before you rely on it.
What a good answer sounds like
Ask questions where the honest answer contains a trade-off, because anyone who has not handled the material has no trade-off to offer and the reply comes back as agreement.
- Second face. “PE, because you said you heat-seal; if you were stapling to a frame we would move you onto the woven.”
- Emboss under a second lamination. “The emboss is on the metallised face; a heated nip on that face will flatten it, so emboss after the second pass or put it on the other face.” “No problem” is not an answer.
- Process temperature. The useful reply asks which face touches the heated surface, continuous web or sheets, under tension or free, and for how long. “High temperature resistant” cannot go on a purchase order.
- Shade between batches. A good answer names a retained sample, how each batch is checked against it, and a batch code on the label. Keep the sample you approved; it settles any shade dispute.
How to read “yes, we can do everything”
“Yes, we can do everything” usually means nobody technical has looked at your enquiry yet.
Converting roll goods means working inside limits, which produce sentences like “not that narrow on the bubble, the edge will not hold”. Ask for the yes as a written line item on the quotation; broad claims narrow once they must appear on paper.
Trading company or converter: ask directly
A trading company is not automatically worse than a converter; what changes is batch traceability and who fixes the problem when a roll is wrong.
Plenty of traders know the product and can source what one plant cannot. What a trader often cannot tell you is which metalliser ran a film and whether your repeat is the same run, which matters when shade or adhesion drifts. Ask whether they convert the material or buy it in; if bought in, ask who holds the batch record and whether a claim is resolved or relayed. Ask us the same and you get one sentence back, on the quotation.
A deliberately small first order beats any claim
A small paid first order tells you more than months of correspondence and costs far less than a wrong container.
Ask for a sample of the exact construction, then a short run at your real width, on your real core, packed as the bulk will be. Put “maximum splices per roll” and “splices flagged at the edge” on the order before the trial run. Then check:
- Face and wind. Which face is metallised, and which way the roll is wound.
- Geometry and condition. Core ID and roll OD against your unwind; slit width held across the roll; no telescoping or edge damage; splice count against the order.
- Emboss orientation. Pattern direction relative to machine direction.
- Shade and label. Shade against the retained sample; construction and batch code on the label match the TDS.
A swatch cut from a master roll proves the material; only a slit roll proves the slitting.
What the first week of emails tells you
Response speed matters less than whether the reply answers the question you asked.
- Latency. Fast on price then silent on the emboss question is the pattern to watch.
- Whether they ever say no. A supplier who has never declined anything has not yet engaged with your specification.
- Whether answers survive repetition. Ask the same question a week later in different words; if they differ, ask which goes on the order.
Related questions and our answers are on our FAQ. If anything there conflicts with what you were told by email, say so — one of the two needs correcting, and better found now.
Before you send the enquiry
Decide the construction, the width, the process it must survive, and what you will check on arrival. Send the same ten questions to three suppliers. Send us the width, the construction and the application, ask the awkward questions, and hold us to what we put in writing.