Packaging Film for Contract Packers: 8 Questions to Ask Before Quoting a Job
A contract packing opportunity can look straightforward on a quotation: product in, packed units out. In practice, the packaging film often determines whether the job runs smoothly, needs repeated intervention or creates unplanned waste.
The right questions at enquiry stage help turn a broad requirement into a workable specification. They also give procurement, production and the brand owner a shared basis for comparing costs. Here are eight questions we recommend asking before committing to packaging film for contract packers.
1. What exactly is being packed?
Start with the product rather than the film. Record the dimensions, weight and shape of the smallest and largest items, along with any corners, abrasive surfaces, loose parts or contamination risks.
A light, regular carton places very different demands on a film from a dense metal component or an irregular bundle. The film must protect the product and form reliable seals without adding unnecessary material. Samples or representative products are far more useful than nominal dimensions alone.
2. Which film format fits the operation?
“Polythene film” can describe several formats. The correct one depends on how the pack is formed and what the finished pack must do.
Pre-made bags can make manual loading simple and repeatable.
Lay-flat tubing lets operators cut different lengths from one reel and seal both ends.
Single-wound sheeting suits many automated wrapping and bag-making systems.
Shrink film can collate products into stable multipacks or add transit protection.
Printed film can carry handling information, instructions or branded graphics.
3. Will the film run by hand or on machinery?
For a manual line, the important details may be opening behaviour, stiffness, bag presentation and ease of sealing. For an automated line, the specification must also consider reel width, core, outside diameter, winding direction, film tracking, tension and the sealing system.
Machine make and model are helpful, but the existing reel label and a short video of the film path can reveal more. If a line already runs successfully, retain a known-good reel and finished pack as reference samples.
Contract packers moving between short campaigns should also allow time for changeovers. A film that performs at steady state may still create excess waste if it takes too long to thread, centre or bring into a stable sealing window.
4. What must the pack withstand?
Define the real journey: filling, sealing, inspection, accumulation, cartoning, palletising, transport and storage. Does the pack need puncture resistance, clarity, opacity, shrink performance or a specific coefficient of friction? Will it encounter cold stores, warm products, dust, oils or sharp edges?
Avoid specifying gauge in isolation. Two films of the same nominal thickness can behave differently because material blend, extrusion control and pack design all matter. The best specification is the lightest one that repeatedly passes the agreed performance checks.
5. How variable are the SKUs and batch sizes?
Contract packing often involves multiple products, seasonal volumes and short-notice work. Map the complete SKU range before deciding that every job needs a separate film.
Sometimes one well-chosen tubing or bag size can cover several products. In other cases, a dedicated width reduces material per pack and improves presentation enough to justify another stock line. Consider reel length, minimum order quantities, storage space and the risk of obsolete stock alongside unit price.
6. Are print, barcode or presentation requirements fixed?
Clarify whether the film is simply protective or part of the consumer-facing pack. Printed film needs approved artwork, repeat length, print position, colours and winding orientation. Barcodes and variable data also require a clear ownership and verification process.
For a new campaign, confirm the approval route before production film is ordered. A plain-film trial can prove the mechanical specification first, separating line performance from artwork approval and reducing the number of variables being changed at once.
7. What compliance evidence is required?
The specification should record the intended use and any evidence the customer expects. If the material will contact food, this must be identified at the outset so the appropriate food-contact material and supporting documentation can be selected. UK government guidance sets out the regulatory framework for materials and articles intended to contact food.
Other requirements may include traceability, batch certification, recycled-content declarations or restrictions set by the brand owner. Ask for these before quoting, not after the first delivery.
8. How will the trial be judged?
A trial needs measurable acceptance criteria. Agree the line speed, sample quantity and representative SKUs, then record:
start-up waste and time to stable running;
seal quality and seal contamination;
film tracking, breaks and machine stops;
accepted packs versus rejects;
product protection and finished-pack appearance;
reel changes and operator handling; and
any downstream effect on labelling, cartoning or palletising.
A practical contract-packing film brief
Before requesting a quotation, gather the product samples, current film or bag, machinery details, annual and batch volumes, pack dimensions, performance needs, compliance documents, artwork requirements, delivery pattern and trial criteria.
That information lets a film supplier quote a real application instead of making assumptions. It also helps the contract packer explain the packaging element of the job clearly to the customer.
Packaging that supports the service you sell
Packaging film should help a contract packer deliver consistent quality, predictable output and credible costs across changing campaigns. Getting the brief right early is usually quicker than troubleshooting a vague specification on the production floor.
