Clear label guide
Check clear label sensor and material considerations.
Service route
Label trials and sample testing for front/back labelling
Sample testing helps confirm that the container, label material and machine setup work together before a final specification is chosen.
On this page
When trials are most useful
Trials are useful when the container shape is unusual, the label is clear or reflective, the label panel is curved, or the finished appearance has tight tolerances.
Testing helps reduce the risk of choosing a machine route that does not suit the pack.
- Clear or transparent labels.
- Tapered, curved or flexible containers.
- Large labels close to pack edges.
- Multiple formats on one machine.
What to supply for trials
Useful trial materials include actual containers, representative labels and notes on target output and finished label position. If the final label stock is not ready, provide the closest available sample and make any differences clear.
- Sample containers in production condition.
- Front and rear label samples or rolls.
- Label drawings and desired position.
- Target speed and tolerance expectations.
What trials can show
Trials can reveal sensor issues, label feed issues, container instability or wipe-down limitations. They can also confirm whether compact, automatic, top/bottom or another route is more suitable.
Trial results should be used to refine the brief and reduce uncertainty before quotation.
- Container handling behaviour.
- Label edge detection and sensor needs.
- Finished label alignment.
- Changeover or adjustment issues.
Using trial results in the project
After testing, the findings can inform machine configuration, change parts, sensor selection and line layout. This gives the buyer a stronger specification before purchase.
- Confirm machine route.
- Clarify options and accessories.
- Plan installation and operator handover.
- Improve quote accuracy.
Best next step: Best next step: send Lancing UK your container photo, label dimensions, label material and target output so the right labelling route can be checked before quote stage.
Related routes
Useful next pages
Use these pages to compare nearby machine routes, applications and buyer guides.
Label sensor guide
Understand sensor choice for label detection.
Contact Lancing UK
Ask about sample testing and trials.
Quick answers
Common questions
Do all labelling projects need trials?
No, but trials are valuable for unusual packs, clear labels or tight presentation requirements.
Can clear labels be tested?
Yes. Clear label testing is useful because sensor selection depends on the label and backing material.
What if I only have prototype labels?
Prototype labels can help, but any differences from final material should be highlighted.
Want help with this labelling requirement?
Send pack photos, label sizes, target speed and current line details. Lancing UK can help shortlist the best front/back labelling machine route.
Trial evidence pack
Keep enough information to reproduce the approved result
A successful demonstration is more useful when the material identity, settings, measurement method and observed faults are recorded.
Material log
Container format, fill state, closure and label-roll references.
Setup record
Guide, belt, head, sensor and recipe settings used during the run.
Measured result
Front and back placement, visual finish, correctly labelled count and faults.
Acceptance link
Carry the approved trial conditions into the project FAT and SAT protocol.
Trial evidence
Questions about sample testing evidence
A useful trial records the exact pack, label and machine conditions so the result can support specification and acceptance decisions.
What should a useful labelling trial report contain?
A useful report identifies the container and fill condition, both label rolls, machine configuration, sensors, guide settings, trial speed, product spacing and the checks performed. It should record placement, finish, missed labels, faults, starts and stops, and any assumptions or unresolved risks.
Photographs and short video are helpful only when tied to the tested conditions and measured result.
Can prototype labels give a misleading trial result?
Yes. A prototype may use different face material, adhesive, liner, die-cut, varnish or roll winding from production stock. It can still reveal basic handling issues, but it may not prove sensor reliability, release behaviour or final visual finish.
Record the differences and repeat the affected checks with production-equivalent labels before acceptance.
How many containers should be reserved for setup and testing?
Reserve enough containers to establish the setup, make controlled adjustments, run a representative sequence, measure a stated sample and repeat critical starts, stops or changeovers. The required quantity depends on pack difficulty, format range and whether inspection or destructive checks are included.
Agree the sample plan with Lancing before shipping so the trial is not limited by too few usable packs.
When should a second sample trial be scheduled?
Repeat testing when the production bottle, label construction, artwork position, closure, fill condition, target output or machine configuration changes in a way that could affect handling or application. A second trial is also justified when the first used provisional materials or left an acceptance risk unresolved.
Do not treat a successful trial on one SKU as automatic evidence for every future format.
Representative trial condition
Run the trial with the same pack condition and line sequence
A successful dry sample does not prove a production process if the real pack arrives filled, capped, warm, damp or recently rinsed. The trial plan should state the condition of the container and reproduce the variables that can change handling or label adhesion.
| Pack state | Empty or filled, capped or uncapped, normal fill weight, centre of gravity and wall rigidity. |
|---|---|
| Surface state | Dry, rinsed, cooled, recently filled, and any credible product or oil contamination risk. |
| Label supply | One alternating reel or two independent rolls, final material, liner, gap, pitch and winding direction. |
| Line sequence | Time and conveyor path between filling, capping, labelling, coding, inspection and packing. |
| Acceptance | Placement datum, sample quantity, sustained output, starts/stops, changeover and finished-pack inspection. |
Use a safe representative fill where needed
Where the production product cannot be used safely off site, agree a substitute that reproduces the relevant weight and handling behaviour. Record what the substitute proves and any product-specific surface or temperature condition that remains to be verified.
Retain the trial inputs with the result
Keep sample references, label-roll references, machine settings, pack condition, measured datums and any exclusions with the trial record. A result without its conditions cannot be applied reliably to a later production format.