Flexible Packaging Types: Pouches, Films and Laminates

Format, film and laminate are different decisions

Start by separating three questions that often get mixed together. A pouch is a finished pack format. A film is a web material supplied in roll or sheet form. A laminate is a structure made by combining two or more layers, often with adhesive or extrusion, to do different jobs. You can have a pouch made from a laminate, or a film used as lidding, wrap or rollstock.

Design work follows from that separation. The format sets the panel geometry, seal areas, fill opening and opening feature. The film or laminate sets the material behavior that the converter must run on its equipment. Ask for the converter's structure description in layer order, substrate names, sealant and any stated thickness or grammage. Do not treat a trade name as a full specification.

• Name the format in the brief: flat pouch, stand-up pouch, spouted pouch, lidding film or rollstock.
• Ask for the laminate in layer order and include the sealant side.
• Keep material claims separate from artwork claims until the converter and compliance reviewer confirm them.

Read a laminate as a stack of jobs

A useful way to review a laminate is to ask what each layer is doing. One layer may carry print, another may provide stiffness or puncture resistance, another may act as a barrier, and the product-contact layer is often the sealant. The exact construction is the converter's to specify for the product, fill weight, process and distribution test plan.

Designers do not need to choose chemistry, but they do need to know which side prints, which side seals, and whether the artwork sits on the front or reverse of a web. Reverse printing changes how white ink and opacity are planned. A clear window or clear seal area may expose the product or the back of the print, so review those areas with the converter before final art.

• Confirm print side and sealant side on the structure drawing.
• Ask whether the design uses reverse print, surface print or a label on film.
• Treat barrier, food contact and recyclability statements as claims to verify, not artwork copy to assume.

Match artwork to the converter's dieline and seal zones

Flexible packaging artwork is built around a converter-supplied dieline, not a generic pouch outline. The dieline shows the cut path, seal areas, fold lines, gussets, fill opening and any tear or zipper feature. Place copy and critical graphics away from seal zones and areas that distort during forming or filling. Confirm the safe area with the converter for the specific format.

Printer marks, dieline visibility, layer structure and proof type should follow the converter's instructions. Adobe notes that printer marks show document box boundaries such as trim and bleed and can be embedded in a separate layer; that is a useful capability, not a universal rule for every job. Ask whether the converter wants marks in the art file, in a separate layer, or added at output.

• Use the current dieline revision and record it in the file name.
• Keep the dieline on its own layer if the converter asks for that workflow.
• Confirm print restrictions for seal zones and opening features with the converter, including which surface carries the ink. Reverse-printed graphics may extend over seal zones in some constructions. Keep intended transparent windows free of opaque ink.

Choose a pouch format by fill, display and handling

Use the table as a questioning aid, not a specification. The right format depends on the product, fill method, pack size, channel and converter capability. For each option, settle the design question before you lay out artwork.

Worked example: simplified film area estimate for a flat pouch

This is a hypothetical geometry exercise, not a manufacturable dieline. Suppose each of two separate pouch panels has a nominal central rectangle 120 mm wide by 180 mm high, excluding all edge allowances. For this exercise only, add 10 mm at each side, 10 mm at the bottom and 10 mm at the top. Each rectangular blank is then 140 mm wide by 200 mm high. Multiply 140 by 200 to get 28,000 square millimeters per panel. Two panels give 56,000 square millimeters per pouch, which is 0.056 square meters. Neither the central rectangle nor these assumed allowances establishes usable capacity or a production seal design.

To plan film for 10,000 pouches, multiply 0.056 by 10,000 to get 560 square meters. If the converter's planning allowance for setup and trim is 8 percent, an illustrative figure only, multiply 560 by 1.08 to get 604.8 square meters. This estimate does not tell you fill volume, usable capacity, barrier performance or the final cut size. The converter's dieline and material specification govern production.

• The hypothetical central rectangle and panel blanks do not establish product dimensions or fill volume.
• Seal allowance and trim are planning inputs, not a substitute for the converter's dieline.
• Label the result as an arithmetic estimate, then validate with the converter's material and run plan.

Prepress and proofing checks for flexible packaging

Flexible packaging prepress has to serve both the printed graphic and the finishing step. Adobe's packaging workflow materials describe PDF Print Engine as rendering package PDF graphics into rasters for each ink at the resolution of the platesetter or digital press. That is one reason to keep the file clean: the converter's prepress system will interpret the art, not your screen.

PDF/X-4 is a common exchange format, and Adobe recommends creating a high-resolution print-ready PDF directly from the source application. PDF/X-4 can carry color-managed RGB, so do not assume every RGB element must be converted by you; the printer's agreed workflow determines conversion. Named spot colors may become separate plates on plate-based presses or be simulated in digital workflows. Check black builds carefully: registration black is distinct from rich black, and the converter's specification governs the build.

Use Output Preview to inspect separations and color warnings, but do not treat an onscreen preview as final proof. Adobe notes that onscreen separation preview does not verify trapping, emulsion options, printer marks, halftone screens and resolution; those are best verified with the print service provider using integral or overlay proofs. Ask which proof type the converter requires for the job.

• Confirm the converter's PDF/X-4 settings and whether RGB is acceptable in the supplied file.
• List named spot colors and ask how they will be produced or simulated.
• Review seal zones, clear areas and white ink in the proof, not only in the art file.
• Get the converter's approval on proof type before mass production.

Practical checklist before you send flexible packaging files

The checklist below is Teal's editorial planning framework. The cited sources support specific prepress principles, not every item on this list. Use it to organize questions for the converter.

• Format named and matched to the converter's current dieline revision.
• Structure described in layer order, with print side and sealant side identified.
• Artwork built at the correct scale, with seal zones, clear areas and opening features marked.
• Dieline, printer marks and any finishing elements on the layers the converter requests.
• Required delivery format and export settings confirmed with the converter, including whether PDF/X-4 is accepted, how color-managed RGB is handled and how spot colors are named.
• Black builds checked against the converter's specification; registration black is not rich black.
• Proof type agreed, with a physical or overlay proof where the converter requires one.
• Supplier cost breakdown requested, separating material, print, conversion, proof and sample charges. Teal does not charge setup, plate or tooling fees; its standard minimum order is 50 units, and specialty rigid is 100.
• Teal's sample kit costs $50, credited to your first order. For other suppliers, confirm sample charges and any order credit in writing.

Scope limits: what this guide does not decide

This guide is a design and prepress planning aid. It does not determine food contact compliance, barrier performance, shelf life, recyclability claims, regulatory marking or child-resistant performance. Those questions need the converter's material data and a compliance reviewer for the intended market and product.

It also does not set retailer or e-commerce channel requirements. If your pack must meet a channel specification, confirm the current requirement in your own agreement or supplier documentation. Do not infer a limit from a general guide.

Finally, the worked example is arithmetic only. It is not a dieline, a material quote or a validation test. Validate material runability, seal integrity and pack performance with the converter and your own test plan.

Questions about Flexible packaging formats, films and laminates