Bottle labelling guide
Clear vs white label sensors on bottle labellers.
Understand why label material and backing paper affect sensing and machine specification.
Most labellers need to detect the label gap.
A bottle labeller dispenses labels from a roll and needs to know where one label ends and the next begins. With standard opaque labels, gap sensing is usually more straightforward.
Clear labels can be more difficult because the contrast between label and backing paper is reduced.
Transparent labels may need specialist sensing.
Clear-on-clear or transparent labels may require ultrasonic or other suitable sensors depending on the material. This should be checked with the actual label roll, not only artwork or supplier descriptions.
Metallic materials, dark backing or unusual varnish can also affect sensing.
Testing prevents production surprises.
If the label sensor cannot consistently detect the label gap, the machine may double-feed, misplace labels or stop. Sending label rolls early allows the application to be checked before final commissioning.
Checklist before you enquire
- Label material and finish
- Backing paper colour and thickness
- Gap between labels
- Clear, metallic or opaque label type
- Label roll unwind direction
- Whether labels are printed yet
- Target speed and accuracy
- Sample roll for testing
FAQ
Common questions.
Do clear labels need a special sensor?
Often they do, but it depends on label and backing material.
Can the sensor be chosen from artwork?
No. The actual label roll is needed for reliable sensor selection.
Are white labels easier to sense?
Generally yes, if there is good contrast at the label gap.
Should label material be discussed before ordering rolls?
Yes, especially for transparent or unusual materials.
Next steps