Reference

Tin Packaging Glossary

Reference definitions for the terminology used across tin packaging — construction, printing, finishing, design, and supply chain. Built for designers, brand teams, and buyers who want to speak the same language as production.

Materials

Tinplate: Thin steel sheet (typically 0.18–0.36 mm) coated on both sides with a fine layer of tin. The base material for nearly all decorative and food-grade tin packaging. Tin plating resists corrosion, is food-safe, and takes lithographic printing cleanly.

Construction

Mold (Tooling): The physical tooling — stamping dies, drawing punches, and rollers — used to shape flat tinplate into a finished tin. Each tin size and shape requires its own mold. Stannum Can maintains 5,000+ existing molds; custom molds take 4 to 6 weeks to produce.
2-Piece Seamless Tin: A tin formed from a single drawn piece of tinplate for the body and one separate piece for the lid, with no vertical side seam. Produces a cleaner visual surface for printed artwork. Common in shallow rectangular and round tins.
3-Piece Tin: A tin built from three separate pieces: body (rolled and welded into a cylinder or box), base, and lid. Allows taller tins and a wider range of shapes than 2-piece seamless, with a visible vertical seam on the body.
Plug Lid: A lid that inserts into the body of the tin with a friction fit, sitting flush or slightly recessed below the rim. Common on tall, cylindrical tins for coffee, tea, and confectionery.
Friction Lid: A lid that fits tightly over the top of the tin body using spring-like tension in the metal. Produces a snug mechanical seal — tighter than a slip lid.
Slip Lid: A loose-fitting lid that rests on top of the tin body without friction or locking mechanism. Used on decorative tins where the lid is meant to come off easily and the contents are not pressure- or aroma-sensitive.
Slide Lid: A lid that slides horizontally in and out of the tin body along tracks formed in the body walls. Common on mint, gum, and breath-freshener tins.
Dome Lid: A lid with a raised, rounded top rather than a flat surface. Adds shelf presence and interior volume; common on cookie, popcorn, and gift tins.
Inside Roll: A curled edge on a tin lid or body where the metal rolls inward, back toward the interior of the tin. Produces a cleaner visible top edge and is common on decorative tins intended for gifting.
Outside Roll: A curled edge on a tin lid or body where the metal rolls outward, away from the interior. Stronger against deformation than inside roll but leaves the rolled edge visible.

Printing

Lithographic Printing (Litho): An offset printing process where ink is transferred from a flat plate to a rubber blanket and then onto the tinplate surface. Produces sharp, photographic-quality imagery with tight registration. The dominant printing method for decorative tin packaging.
CMYK: Four-color process printing using cyan, magenta, yellow, and black inks layered to reproduce a wide gamut of colors. Used for photography, illustration, and artwork with gradients or fine color variation.
Pantone (PMS): A proprietary color-matching system of pre-mixed spot inks used where exact color reproduction matters — typically for brand logos and signature colors. Unlike CMYK, Pantone colors are mixed to a specification rather than built from four process inks.
White Layer (White Plate): A separate printed layer of opaque white ink laid down as a base coat before colored inks are applied. Required when printing full-color artwork on tinplate because the metal substrate otherwise shifts translucent ink colors. Areas intentionally left without white layer allow raw tin to show through as part of the design.

Finishing

Embossing: A surface treatment that raises a portion of the tinplate outward, creating a tactile three-dimensional pattern. Stannum Can works to 1 mm precision embossing. Commonly combined with lithographic printing to add texture to logos, crests, and decorative patterns.
Debossing: The inverse of embossing — a surface treatment that presses a portion of the tinplate inward, creating a recessed pattern. Produces a more subtle tactile effect than embossing and is often used for understated branding.
Lacquer (Interior Coating): A clear or pigmented coating applied to the inside surface of a tin to protect against corrosion, moisture, and product migration. Food-grade lacquers — typically epoxy or modified epoxy — are used in tin packaging for food products.

Design

Die-line: A flat, scaled template showing every surface of a tin as if it had been unrolled onto a single plane. Communicates exact dimensions, curve transitions, visible surfaces, and bleed zones to the designer. Every Stannum Can project starts with a die-line specific to the tooling being produced.
Bleed: Artwork extended past the visible edge of the printed surface so that slight trim or roll variation does not leave a hairline of unprinted material showing. On a tin die-line, bleed zones are typically marked separately from the visible design area.
Mockup: A photorealistic 3D digital render (or physical prototype) of a finished tin, used to approve artwork, finish, and structural details before tooling is committed. Reduces costly redesigns at the production stage.

Logistics

MOQ (Minimum Order Quantity): The smallest number of units a manufacturer will produce in a single order. MOQs vary by shape complexity, finish, and tooling — custom molds generally carry higher MOQs than standard molds.
LCL (Less than Container Load): Ocean freight shipping where a shipment occupies only part of a shared container with other consignees' goods. Lower per-order cost than a full container but longer transit time.
FCL (Full Container Load): Ocean freight shipping where a shipment fills an entire dedicated container. Faster transit and lower risk of damage than LCL, but requires enough volume to justify the full container cost.
Release Program: A supply-chain arrangement where a manufacturer produces a full quantity upfront, warehouses it, and releases inventory to the customer in scheduled batches. Reduces storage costs and upfront cash tied up in stock.
EPR (Extended Producer Responsibility): A regulatory framework, adopted in many regions including parts of Canada and the European Union, that assigns the end-of-life recovery, recycling, or disposal cost of packaging to the brand that placed it on the market. Tin packaging's infinite recyclability generally produces favorable EPR economics compared to plastics.

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