Which bottles should be supplied for a label-removal trial?
A label-removal trial should use worst-case returned bottles, not only clean reference bottles. Include older labels, damaged labels, damp or dry storage examples, different label stocks and any bottle that may be rejected if the label cannot be removed acceptably.
- Oldest returned labelled bottle
- Most difficult adhesive example
- Different label materials and print finishes
- Damaged or partly removed label examples
- Clean reference bottle for comparison
What should be checked after label removal?
After label removal, check remaining adhesive, paper fibres, scuffed glass, label shadow, odour, foreign matter and whether the bottle can move into the wash route. Label removal alone should not be treated as proof that the bottle is ready for filling.
- Remaining adhesive or fibres
- Bottle surface damage
- Need for follow-on washing
- Reject or rework decision
- Photos before and after trial
How does label removal affect the washer specification?
Label removal affects the washer specification by changing the residue load, solids handling, wastewater, inspection and reject requirements. If labels and adhesive remain after removal, the main washer may need a different process route or acceptance test.
- Expected label load per hour
- Solids capture and disposal route
- Adhesive residue behaviour
- Follow-on wash and rinse requirement
- Inspection point after washing