TL;DR: The single biggest source of requotes and sample delays is an incomplete brief — not supplier capability. A well-structured request cuts average sample iteration rounds from 3 down to 1.5.
For a related specification, compare Sample & Quotation Request Guide for Colour Management & Proofing before finalising the packaging brief.
TL;DR: Artwork files submitted below 300 dpi at final print size add an average of 5–7 working days to the proofing cycle because we cannot proceed until corrected files arrive.
What Your Supplier Actually Needs Before Quoting Accurately #
Most quotation requests we receive are missing between two and four critical pieces of information. That is not a criticism — it reflects how packaging sourcing works at early project stages, where decisions are still fluid. But a quote built on assumptions is not a real quote. When structural dimensions are unconfirmed, or when the artwork supplied is a low-resolution marketing mockup rather than a production-ready file, the figure we return carries so many asterisks that comparing it to a competitor’s quote becomes meaningless.
There are two separate documents involved in any sampling engagement: a Request for Quotation (RFQ) and a Sample Brief. Brands often conflate them. The RFQ drives cost calculation. The Sample Brief drives physical production. Both need specific inputs. Neither works well without the other.
A complete RFQ should state the outer dimensions (L × W × H in millimetres), board or substrate specification, print configuration (number of colours, spot or process, surface finish), quantity tiers you want costed (typically three: development sample qty, initial production run, and a 12-month forecast volume), and target delivery point with Incoterms. Without quantity tiers, a supplier quoting 500 units may be running a completely different production process than one quoting for 10,000 — and the per-unit cost difference can be 40–60%.
Comparing What a White Sample, Printed Proof, and Production Sample Actually Confirm #
These are not interchangeable stages. Each confirms a different set of variables.
| Sample Type | What It Confirms | Artwork Required | Typical Lead Time (working days) |
|---|---|---|---|
| White / Construction Sample | Structure, dimensions, folding, fitment, magnets, closures | No — unprinted | 7–10 days |
| Printed Colour Proof (digital) | Colour rendering, layout, text legibility, Pantone simulation | Yes — finalised artwork | 10–14 days |
| Pre-production / Production Sample | Full process validation: print, diecutting, lamination, assembly | Yes — approved proof | 18–25 days |
A white sample is the correct starting point when dimensions are still being confirmed or when you are fitting a product insert for the first time. We manufacture white samples from the confirmed structural dieline on 1.8–2.5mm greyboard (for rigid boxes) or from the correct GSM folding boxboard (for cartons). Requesting printed proofs before the white sample is approved is one of the most reliable ways to burn sampling budget — if a panel dimension shifts by even 3mm after fitment testing, every printed element repositions.
The printed proof stage is where artwork file quality matters most. We work to a minimum 300 dpi at final print size, with bleed set to 3mm on all cut edges. Files should be supplied as print-ready PDF/X-4 or layered AI/PSDT with all fonts converted to outlines. Pantone references should be called out using Pantone Matching System codes rather than RGB approximations — RGB-to-CMYK conversion without a stated intent shifts Pantone 485 (red) visibly warm in offset litho and we flag this in our pre-flight review, what we internally track as our PF-02 artwork clearance checklist.
Production samples confirm that the approved proof replicates correctly at process speed, that lamination adhesion meets our peel-resistance threshold (minimum 1.2 N/mm per our internal acceptance criterion, consistent with GB/T 37117 flexible packaging bond strength guidelines), and that dimensional tolerances hold across a batch of at least 20 units from the same run.
The Variable That Shifts Every Timeline: Artwork Readiness #
Structural and material decisions are usually resolvable within one round of back-and-forth. Artwork is where delays compound.
A file submitted as an RGB JPEG at 150 dpi is not a slow artwork file — it is not an artwork file at all for offset print production. Yet in our intake log over the past 18 months, roughly one in three initial submissions from new brand partners required a resubmission for resolution, colour mode, or missing bleed. Each resubmission adds 5–7 working days to the proofing cycle because we hold the proof queue until files pass pre-flight.
The less obvious issue is structural artwork lockdown timing. Artwork positioned for a box with a 90mm front panel cannot simply be rescaled to fit an 85mm panel — text and graphic elements reflow differently and type at 6pt becomes illegible at reduced scale. ISO 11160 packaging symbol requirements for certain regulated product categories also prescribe minimum symbol sizes, which a rescale may violate.
Our standing recommendation: finalise the white sample before briefing your designer to produce print-ready files. The sequence that produces the fewest iterations is construction approval → artwork production → printed proof → production sample. Reversing steps two and three routinely adds one full iteration cycle.
Evaluating Received Samples Before Sign-Off #
When samples arrive, evaluate them against these four dimensions in order.
- Dimensional accuracy: Measure all critical panels against the approved dieline with a calibrated calliper. Our tolerance on folding carton panels is ±0.5mm; on rigid box external dimensions it is ±1.0mm. If a panel reads outside this range, note the measurement and return with a marked-up dieline, not a photo.
- Colour conformance: Evaluate under D50 standard illuminant (as specified in ISO 3664:2009) not under office fluorescent or phone camera preview. Colour differences that disappear under one light source and reappear under another indicate a metamerism issue, which is a substrate or ink selection problem, not a printing error.
- Surface finish adhesion: For soft-touch laminate or spot UV, test adhesion by pressing a 25mm wide tape strip at 90° peel. Delamination below 0.8 N/mm pull indicates an adhesion failure requiring investigation before production release.
- Functional fitment: Place the actual product in the sample. Check insert foam compression, magnetic closure pull force (target 0.3–0.5 kgf for single-magnet rigid boxes), and whether tuck flaps engage without buckling.
Document findings in writing. A photograph is supporting evidence, not a formal sample comment. Suppliers who receive written dimensional feedback can act the same day; photo-only feedback typically requires a clarifying exchange.
Specification Notes for Brand Partners #
When you brief us on a sampling and quotation request, the four inputs that matter most are: final product dimensions or weight (so we can confirm fitment and board spec), target retail channel (because e-commerce packaging to ISTA 6-AMAZON standards requires different structural grades than retail shelf), quantity for initial order and 12-month forecast, and any regulatory requirements for your product category such as FDA 21 CFR or EU food-contact compliance if the packaging will contact product.
The gap that causes the most sample rework: briefs that specify a material (“kraft paper with soft-touch laminate”) without specifying the board weight underneath. Kraft laminate on 300gsm SBS behaves differently structurally than the same surface on 400gsm FBB. We will ask, and the answer affects both sample production and cost.
Our standard lead time for a white construction sample is 7–10 working days from structural brief confirmation. Printed proofs run 10–14 working days from approved artwork receipt. Adding surface finishes (foil, emboss, soft-touch) adds 3–5 working days. Rush sampling is available in some categories at additional cost, but rushing the artwork stage is not something we can control on our end.
How many Pantone colours can I include before the quote changes significantly?
It depends on whether you are adding a spot colour to a CMYK base or replacing process with all-spot. Up to 4-colour process plus one spot (typically for a brand colour outside CMYK gamut) is standard pricing. Adding a second spot increases press setup cost, and at short runs below 2,000 units the per-unit impact is measurable. At 10,000+ units, the delta narrows considerably.
Can I get a quote without confirmed dimensions?
Yes, but treat it as a budget range rather than a firm figure. A ±15% swing in box dimensions can shift tooling costs by 20–30% and unit costs by 8–12%. We will provide an indicative range, but we lock pricing only after the white sample structural brief is confirmed.
What file format should artwork be supplied in?
Print-ready PDF/X-4 is preferred. Layered Adobe Illustrator (AI) with outlined fonts is acceptable. Files must be CMYK colour mode, 300 dpi minimum at final size, with 3mm bleed on all cut edges. RGB files and JPEG exports from presentation tools require conversion and add lead time.
If the first sample is close but not perfect, do I pay for the second sample?
It depends on what changed. Structural adjustments driven by our measurement error are re-sampled at our cost. Revisions driven by a changed brief, added print element, or new fitment requirement from your side are invoiced at a reduced second-sample rate. We document what triggered each revision in our internal SR-04 sample revision log so there is no ambiguity at billing.
Planning a packaging project? Contact our team to request a complimentary specification review and sample quote.
