TL;DR: A poorly structured brief is the single most common reason a PSL quote takes three rounds instead of one — give suppliers the right inputs upfront and you’ll cut sampling cycles significantly.
TL;DR: In our experience, briefs missing liner release value or adhesive type requirement add an average of 8–12 working days to the sampling cycle because material substitutions require re-approval.
What a Complete Brief Actually Contains — and Why Each Field Matters #
When a brand partner sends us a quotation request, the first thing we do internally is run it through what we call the BQ-03 brief completeness check. Incomplete briefs don’t get rejected — they get held while we chase information. That delay is always more expensive than the time it would have taken to fill out the brief properly.
Here’s what a complete PSL brief needs, and why each field is non-negotiable:
Label dimensions: Width × height in millimetres, with corner radius if applicable. Do not leave this as “same as current supplier” — we have no way to verify what that is. Bleed must extend 1.5mm beyond the die-cut line. For labels destined for automated application, include the core diameter (typically 76mm for machine-applied rolls) and the roll direction (wound-in or wound-out).
Substrate preference: Face stock, adhesive type, and liner. If you don’t know the exact grade, describe the application: container material, surface curvature, temperature range in use, and whether the label must be removable. We can specify from there.
Print specification: Colour mode (CMYK process, spot Pantone, or both), number of colours, whether white ink is required as a base layer (mandatory on clear and metallic films), and any surface finishing — gloss or matte lamination, varnish, foil blocking.
Artwork files: Press-ready PDF/X-4 at 300 dpi minimum, with fonts embedded and all linked images flattened. Spot colour swatches named to Pantone+ Coated or Uncoated convention. Die-cut line on a dedicated separation layer, not embedded in the artwork itself.
Quantity tiers: Request pricing at a minimum of three tiers. For digital printing, typical breaks fall at 500, 2,000 and 5,000 labels. For flexographic printing, economical MOQ is usually 5,000–10,000 labels per SKU, with meaningful cost reduction at 25,000+.
| Information Category | Minimum Required | Common Gap That Causes Delay |
|---|---|---|
| Label size | W × H in mm, corner radius | “Same as existing” with no reference |
| Substrate | Face stock + adhesive + liner description | Adhesive type omitted; service environment not stated |
| Print spec | Colour count, white ink, finish | Pantone names missing; lamination type unspecified |
| Artwork | PDF/X-4, 300 dpi, embedded fonts | RGB files submitted; die line not separated |
| Quantity | 3 tiers, unit of measure (pcs vs rolls) | Single quantity only; no roll vs sheet specified |
| Compliance | Any food contact, chemical, temperature rating needed | Omitted entirely; raised only after quote issued |
Compliance requirements deserve particular attention. FDA 21 CFR Part 175/176 for food-contact adhesives, EU Regulation 10/2011 for plastic materials, and REACH SVHC declarations all affect material selection. If these requirements surface after a quote is issued, the quote is void.
Where the Sampling Process Breaks Down #
The most avoidable delay we see is artwork submitted as RGB screen files rather than CMYK press-ready files. A 300 dpi JPEG exported from Instagram is not press-ready. Colour conversion from RGB to CMYK shifts Pantone-matched brand colours unpredictably, and the client then disputes the colour on the printed proof. That creates one full additional sampling round: two to three weeks lost.
Second most common failure: the brief specifies a “clear label” without stating whether the container is round, oval, or flat-sided with a significant surface energy variation. Polypropylene squeeze tubes, for instance, have a surface energy below 35 mN/m, which means a standard permanent acrylic adhesive will not anchor reliably. We specify a low-surface-energy acrylic adhesive system for these applications, tested against ASTM D1000 peel adhesion to substrate. If that substrate detail is missing, our default selection may fail on the client’s actual container — and we won’t know until they tell us.
Third scenario: sampling approved, production ordered, then the client notifies us that the label will go through a retort process at 121°C. Standard biaxially oriented polypropylene (BOPP) face stock delaminates above 80°C. Retort applications require polyester (PET) face stock with a rubber-based or speciality acrylic adhesive rated to at least 130°C. Re-specifying at production stage means re-sampling, re-approval, and a minimum of 15 additional working days. This is the application environment question that gets skipped more often than any other.
Which Sample Type Should You Request First? #
Request a white sample (unprinted structural sample) only if you need to validate die-cut shape, label size on the container, or liner peel force before committing print costs. For most straightforward label briefs, it’s faster to go straight to a printed proof.
A printed proof on our digital press runs in 3–5 working days from approved artwork, at no tooling cost. It won’t match the final flexographic print exactly — ink density and dot gain differ between digital and flexo — but it validates colour intent and layout. Production samples from a flexographic run, which reflect final print quality, require 10–15 working days after plate production. That’s the sample to evaluate against your brand colour standards using a spectrophotometer reading against ISO 12647-6 for flexographic print tolerances (delta E ≤ 3.0 for process colours).
Specification Notes for Brand Partners #
When you brief us on pressure-sensitive labels, the most useful thing you can send alongside your dimensions and artwork is a physical sample of the container the label will be applied to. We run an adhesion compatibility check against the actual substrate as part of our incoming material protocol — one container is all we need.
The brief gap that causes the most sample iterations is missing liner specification for automated application. If your filling line uses a specific peel angle or dispenser blade geometry, the liner stiffness and release value must match. Our standard liner is 78gsm glassine with a medium-release silicone coating. If your equipment requires a heavier 90gsm polyester liner with a tight release below 10 cN/cm (measured per TLMI Release Force Test Method), tell us upfront.
Our typical timeline from complete brief to white sample approval is 7–10 working days. Printed proof follows in 3–5 working days from approved artwork. Production samples add 10–15 working days. Those timelines assume no artwork revisions and no material substitutions after brief acceptance.
Frequently Asked Questions #
How many Pantone colours can I include on a flexographic label without the cost becoming prohibitive?
It depends on label size and run volume. Flexographic printing uses a dedicated plate and anilox roller per colour station. Adding a fifth or sixth colour beyond CMYK adds plate cost and setup time. For run quantities below 20,000 labels, a four-colour process print with careful Pantone simulation often delivers a better cost-per-label than six-spot-colour flexo. For large-volume runs above 50,000, the per-unit plate amortisation drops enough that six colours becomes reasonable. Ask us to model both options at your specific quantity.
Can I request samples before placing a production order?
Yes. Printed proofs from our digital press are available for most label configurations with no plate cost. These are useful for colour approval but not for adhesion or application testing. If you need to test the label on your filling line or validate machine application, request a production sample run — typically a minimum quantity of 500–1,000 labels from a short flexo setup. That sample run does carry a tooling charge.
My current supplier quoted a lower GSM face stock. Does that matter?
It depends on application method and end use. A 60gsm paper face stock versus an 80gsm stock looks like a cost saving, but the thinner stock has lower tear resistance and may not survive automated high-speed application on a curved container without flagging at the edges. For hand-applied labels on flat surfaces, 60gsm is usually fine. For machine-applied labels on bottles at speeds above 200 labels/minute, we wouldn’t go below 80gsm uncoated or 70gsm coated paper. Film substrates carry their own caliper specifications — BOPP is typically 50–60 microns, PET 50 microns.
What’s the right way to compare quotes from two different label suppliers?
Check that the substrate specification is identical, not just the price per thousand. Two quotes can reference “BOPP clear label” and differ by 30% in price because one is 50-micron high-clarity BOPP with a permanent high-tack adhesive and UV gloss lamination, and the other is 40-micron standard BOPP with a general-purpose adhesive and surface varnish only. Request that both quotes itemise face stock grade, adhesive type, liner weight, and finish separately. If one supplier won’t break out the specification, that’s the supplier to scrutinise more carefully.
Planning a packaging project? Contact our team to request a complimentary specification review and sample quote.
