ETP coils, slit coils and cut sheets
For edible-oil cans and can-making
Coil width reference: 600–1250 mm
Clear slitting, cutting and packing quote
MTC, COO and food-contact document support
ETP (electrolytic tinplate) combines a cold-rolled steel base with a controlled electrolytic tin coating. The steel supplies stiffness and formability; the tin-coated surface supports subsequent printing, lacquering, forming and joining. GDD Metal can coordinate mill coils, slit coils and cut-to-length sheets against the equipment and blank layout you specify.
This page focuses on one buying decision: should your edible-oil can or general metal-packaging project receive coil, a narrower slit coil or sheets ready for sheet-fed printing and body making? Send a drawing or current specification so that the material, conversion yield and freight packing can be quoted together.
| Material and formats | Electrolytic tinplate (ETP / SPTE); mill coil, slit coil, cut sheet |
|---|---|
| Thickness | 0.13–0.50 mm indicative supply range; available combinations depend on route and standard |
| Coil width | 600–1250 mm indicative master-coil range; narrower slit widths by approved layout |
| Cut-sheet size | Width and length to agreed drawing and line capability; common sheet-page references are 500–1200 mm width and 500–1200 mm length |
| Temper and coating | SR T grades or DR grades as specified; examples include 2.8/2.8 and 5.6/5.6 g/m² tin, with differential coating on request; values denote nominal tin mass on each face |
| Finish and treatment | Bright, stone or other agreed finish; passivation and oiling to the approved specification |
| Coil and processing | 508 / 610 mm coil ID reference; slitting, cut-to-length and stack/pack by order |
| Specification and records | Agreed mill specification; ASTM A624/A624M for applicable single-reduced material or A626/A626M for applicable double-reduced material; MTC and agreed inspection records |
Ranges are sourcing references, not one guaranteed stock list or one standard's complete dimensional scope. Confirm grade, tolerance, coating, minimum quantity and availability in the quotation and purchase contract.
Choose master coil when your plant has its own slitting or cut-to-length capacity and needs flexibility across several can-body layouts. Confirm decoiler ID, maximum coil weight, width tolerance and preferred rolling direction before ordering.
Request slit coil when a fixed line width removes an in-house slitting step. The agreed slit width, edge quality, number of strips per mother coil and residual trim determine conversion yield.
Sheets suit metal decorators and can makers that feed flat stock into printing, lacquering, stamping or body-making equipment. Specify both sheet dimensions, squareness and flatness requirements, stack height, pallet limit and the direction in which the sheet will be formed. DR tinplate is direction-sensitive, so the rolling direction must be shown on the drawing.
Start with the finished body blank or print sheet, then work backward to a practical master-coil width. For illustration only, two 600 mm strips from a 1250 mm master width occupy 1200 mm, or 96% of the nominal width; the remaining 50 mm is 4% before edge trimming, knife clearance, defects and operating losses. This is a layout example, not a guaranteed production yield.
Ask for a quote showing the input-coil basis, finished slit or sheet dimensions, usable output, offcut treatment, setup and processing charges, extra sheets or pallets, and whether freight is calculated on gross or net shipped weight. A low price per tonne of master coil can be less attractive once cutting losses and overseas handling are included. There is no fixed universal cutting fee: quantity, gauge, width layout, tolerances, service provider and packing method change the cost.
For a three-piece edible-oil can, align tinplate temper and gauge with body forming, welding and double seaming, then confirm the inside lacquer for the actual oil, fill temperature, storage time and destination market. ETP can form the body and selected ends, but its metal grade alone does not establish food-contact compliance for the finished package. Internal coating, seams, closures and finished-can testing must be considered as a system.
For printed cans, agree which side faces the food and which side receives the outside artwork. When differential tin coating is ordered, identify the heavier and lighter faces on the material specification and in production handling. If the project also needs printed sheet stock, see ETP cut sheets; for finished packaging context, see tin oil cans.
We can coordinate a mill test certificate (MTC) traceable to the supplied lot, plus agreed thickness, temper and tin-coating checks. For a food-contact project, request the available material or coating declarations and applicable test reports for the exact product construction and destination requirements. A steel MTC does not replace a migration test or a finished-can food-contact assessment; report scope, test conditions and validity should be reviewed before use.
Export preparation can include rust-resistant wrapping, protective covers and edge guards, steel strapping, moisture-aware pallet or wooden support design, and secure loading for the booked route. Sheet stacks need flat, protected pallets; coils require stable supports and handling marks. Packing method and any wood-treatment requirements should be agreed before shipment.
For orders where applicable, the document set can include a certificate of origin, MTC, commercial invoice, packing list, bill of lading, customs papers, relevant food-contact support reports and export license where legally required. Availability and exact wording depend on product, destination and transaction; document requirements belong in the purchase contract.
Edible-oil can maker: A manufacturer has an approved three-piece can design but needs a coil and cut-sheet comparison. The buyer shares body blank, weld allowance, annual quantity, liner specification and port. We evaluate candidate widths and quote metal, conversion and packing separately before trial approval.
Sheet-fed metal printer: A decorator needs repeatable flat sheets with the correct outside surface and rolling direction. The order specifies print size, stack protection, coating face orientation and acceptance criteria so the production team can run a controlled first batch.
Packaging distributor: A distributor combines several can-maker orders. Separating mother-coil widths, slit layouts and sheet pallets helps identify where one procurement lot is practical and where independent lots protect traceability. These are illustrative workflows, not claims about named customers or measured outcomes.
Potentially, subject to production schedule, minimum lot, agreed specifications and loading plan. Send each format's quantity and dimensions so the quotation can show separate conversion and packing charges.
No. That is a broad sourcing range. ASTM A624/A624M applies to its specified single-reduced scope; ASTM A626/A626M addresses double-reduced tinplate. Select the standard, thickness and testing requirements together.
No. The MTC supports metal identity and measured properties. The approved liner, actual filling conditions, relevant food-contact documentation and finished-container performance require separate review.
Provide the can or blank drawing, required thickness and temper, tin coating on each side, sheet or coil dimensions, surface and liner requirements, monthly volume, delivery port, packaging limits and required documents. A current specification or MTC helps us compare like for like.
Send your drawing and target quantity. We will review a coil-versus-sheet supply route, indicative width utilization, processing scope, packing plan and available documents before you confirm the order.
Contact GDD Metal for an ETP quotation or compare the ETP coil specification page.
