TL;DR: The single biggest cause of requotes on metal tin and aluminium case projects is an incomplete brief — specifically missing internal dimensions, not nominal external ones.
TL;DR: A production sample for a custom metal tin typically requires 35–45 working days from approved artwork; white samples can be ready in 15–20 working days if standard tooling fits your size.
What Your Brief Needs to Tell Us Before We Can Quote Accurately #
The most common scenario we encounter: a brand manager sends us a reference image from a competitor’s product, a rough box dimension in millimetres, and a target quantity. That brief produces a rough ballpark, not a real quote. When the actual sample arrives and the product doesn’t fit, the project resets.
For metal tins specifically, the dimensional brief needs to distinguish between internal and external dimensions. Tinplate wall thickness runs 0.20–0.28mm for standard round tins and 0.22–0.35mm for rectangular pressed tins — which means a tin specified at 100mm external diameter has an internal diameter of roughly 99.5mm. For most products that margin is fine. For a tin housing a precision cosmetic compact or a calibrated instrument, it matters.
Aluminium cases run thicker: extruded aluminium profiles for hinged cases typically have wall sections of 1.2–2.0mm, and the corner extrusion adds another 1.5–2.5mm per side. A case with a nominal 200 × 150 × 50mm external footprint may yield only 194 × 144 × 44mm usable interior, once the profile and foam insert are accounted for.
What we need from you in the initial brief:
- Internal usable dimensions (L × W × H in mm) and the weight of the product going inside
- Whether the closure is friction-fit, slip-lid, hinged, or locking (each drives a different tooling path)
- Quantity per SKU per year, broken into tiers (500 / 1,000 / 5,000 units) — pricing steps are not linear and the tier breakpoints vary by construction type
- Decoration intent: print, emboss, lithography, anodising, powder coat, or bare metal
- Any regulatory requirement: food contact (FDA 21 CFR 175.300 or EU Regulation 10/2011 for lacquer-lined tins), child-resistant closure, or UN-certified transport packaging
If you don’t have all of this yet, send us what you have. A partial brief still lets us identify which parameters will drive the most cost variation, so we can tell you where to focus your decisions.
Artwork Files — What Format, What Resolution, and What the Artwork Needs to Include #
Metal tin printing is done on flat sheet stock before forming — which means your artwork is applied to a flat metal blank, then the blank is die-cut, rolled, and seamed. The print area on the flat blank is not identical to the finished tin surface. Artwork supplied as a simple rectangle will not work.
We provide a flat die-line template specific to each tin construction. Artwork must be built inside that template.
File requirements for offset litho printing on tinplate:
- Format: Adobe Illustrator (.ai) or PDF/X-4, with all fonts outlined
- Colour mode: CMYK + spot Pantone references for each special colour
- Resolution for raster elements: 300 dpi minimum at final output size (350 dpi preferred for fine detail)
- Bleed: 3mm beyond die-cut line on all edges; safety margin for critical text: 5mm inside the trim line
- Overprint settings: confirm all black text is set to overprint; reversed-out white on a dark background requires a white ink pass specification
For embossed or debossed elements, supply the emboss area as a separate layer with a clear vector path. Emboss registration on tin is held to ±0.3mm on our press line — tighter than what most buyers expect is possible on metal.
Aluminium cases with pad-printed or laser-engraved decoration have different requirements. Pad print artwork should be single-colour vector at the exact output size; laser engraving files should be black-and-white bitmap at 600 dpi or higher, or a vector outline file.
A recurring mistake: buyers supply artwork sized to the external tin dimensions rather than the flat blank template. This requires a full artwork rebuild on our side and adds 3–5 working days to the sampling timeline.
Sample Types, Timelines, and What Each Stage Is For #
There are three sample stages in a typical custom metal tin project, and conflating them causes both budget confusion and timeline surprises.
| Sample Type | What It Tests | Typical Lead Time | Cost |
|---|---|---|---|
| White (unprinted) sample | Structural fit, dimensions, closure feel | 15–20 working days | USD 80–180 per piece depending on tooling |
| Printed pre-production proof | Colour accuracy, artwork registration, surface finish | 25–35 working days from approved artwork | USD 150–400 per piece |
| Production sample (run-off) | Full production quality: print, forming, seam, coating | 35–45 working days | Typically 3–5 pieces from first production run |
White samples use either existing standard tooling or newly made tooling billed separately. If your dimension falls within 2mm of a standard tool we hold, we can usually modify the tool rather than make new — that saves USD 300–800 on tooling cost and 8–10 working days. Worth asking us to check against our standard size library before committing to new tooling.
Printed proofs are produced on a short run of pre-formed blanks. Colour on metal behaves differently than on paper: tinplate has zero ink absorbency, so ink sits on the surface and cures under UV or through oven drying at 160–180°C. Pantone references shift slightly under these conditions. We run our proofs against G7-calibrated density targets and provide a signed colour standard with every proof set.
The production sample is the final gate. This is where you evaluate seam quality, lithography registration, coating adhesion (cross-hatch test per ISO 2409, 0B–5B scale — we target 0B for food-contact applications), and closure function. Do not skip the production sample stage for any order above 1,000 units.
Cost-Performance Trade-offs: Where Spec Changes Move the Needle #
Tinplate gauge is the single variable with the most direct effect on both unit cost and structural performance. The practical range for consumer tins is 0.20–0.30mm (DR-8 to DR-9 temper, per ASTM A623). Moving from 0.23mm to 0.27mm adds roughly 15–20% to the tinplate material cost but meaningfully increases dent resistance — relevant for gift tins that are stacked during shipping or displayed in a retail environment where handling is rough.
The counterargument for thinner gauge: if your tin is small-format (under 80mm diameter), is immediately sleeved or gift-wrapped, and never stacked more than three units high in distribution, 0.20mm is structurally adequate and the cost saving over a 20,000-unit run is measurable.
Interior lacquer coating adds cost but is not always necessary. For food-contact applications, an epoxy-phenolic or acrylic lacquer lining is required under FDA 21 CFR 175.300. For non-food dry goods — stationery, cosmetics not in direct skin contact, collectibles — bare tinplate or an external-only varnish is acceptable. Buyers sometimes specify food-grade lacquer out of caution on non-food applications; it adds cost without benefit in those cases.
Aluminium case hardware is a different cost driver. Butterfly latches, combination locks, and foam insert grades all carry independent pricing tiers. Our standard configuration uses ABS butterfly latches with a pull force rated to 15kg — adequate for most instrument and sample case applications. Upgrading to stainless steel latches increases hardware cost by approximately USD 1.20–2.40 per pair, but extends cycle life from roughly 8,000 open-close cycles to over 25,000.
On print finish: matte varnish over lithographed tinplate has better scratch resistance in distribution than gloss UV, counterintuitively. Gloss UV reads better at retail but shows micro-scratches within two to three weeks of handling. We log which finish performs better in distribution under what we internally call our Surface Performance Classification (SPC-3 category for tin litho finishes).
How to Compare Quotes from Different Suppliers Without Being Misled by the Bottom Line #
Price comparison across metal tin quotes is unreliable unless the specifications are identical. Four variables that suppliers routinely scope differently:
Tooling included or excluded. Some suppliers quote tooling as a line item; others absorb it into the unit price for higher-volume tiers. Ask every supplier to separate tooling cost from unit cost.
Tinplate grade and gauge. A quote based on 0.20mm DR-8 tinplate is not comparable to one based on 0.23mm T-2 temper. Ask each supplier to confirm gauge and temper grade per ASTM A623 or the equivalent GB/T 2520 standard.
Number of ink colours and passes. A four-colour litho quote (CMYK) differs structurally from a quote that includes a white base pass plus four colours plus a spot varnish. Six-pass printing costs noticeably more than four-pass. Confirm total pass count.
Sample cost and revision policy. Some suppliers quote samples at cost; others include one revision free. This matters when your artwork goes through two rounds of colour correction — the cost delta can reach USD 600–900 on a complex print job.
Our quotation template includes a material specification block that lists tinplate grade, gauge, lacquer specification, print passes, and tooling status line by line. If a competing quote doesn’t include this, ask for it. The response — or lack of one — is informative.
Specification Notes for Brand Partners #
When you brief us on a metal tin or aluminium case project, the three things that affect accuracy of our first quote most are: internal dimensions with product weight, closure type, and decoration method. If those three are confirmed, we can return a structured quote within 2–3 working days.
The most common brief gap we see is that the buyer provides external reference dimensions from a competitor tin rather than their own product’s actual requirements. This produces a structurally correct tin that may not actually fit the product inside. Before sending dimensions, put a calliper on your product at its widest point, add 2–4mm clearance on each axis, and use that as your internal specification.
Our standard sampling timeline for a new custom tin construction is 15–20 working days for a white sample and 35–45 working days for a printed production sample, from brief confirmation. That timeline extends by 8–10 working days if new tooling is required and by 3–5 working days if artwork needs to be rebuilt from non-compliant files. Providing print-ready artwork in the correct flat die-line template is the most reliable way to keep sampling on schedule.
Does the tin need food-contact certification? If yes, confirm this at brief stage — it affects lacquer selection, and changing after tooling is made adds cost and delay.
What’s the minimum order quantity for a custom tin? For fully custom dimensions and litho printing, our MOQ is typically 3,000–5,000 units per SKU. Standard-size tins with custom print can be run from 1,000 units.
Can we see a physical sample before committing to production tooling? Yes — if your target dimensions fall within 2mm of a size we already tool for, we can produce a white sample from existing tooling for USD 80–180, before any tooling investment.
Our quote came back 30% higher than a competitor. Why? The most likely explanation is a specification difference: gauge, number of print passes, lacquer type, or whether tooling is included. Ask both suppliers to confirm tinplate gauge per ASTM A623 or GB/T 2520 and total print passes — if those match, then you have a comparable price basis.
How many sample revision rounds are typically needed before production approval? For projects with compliant artwork submitted on our die-line template and a confirmed Pantone reference, one printed proof round is usually sufficient. Projects with complex spot colours or tight emboss registration requirements typically need two rounds. We build one revision into our sampling cost on orders over 5,000 units.
Planning a packaging project? Contact our team to request a complimentary specification review and sample quote.
