Direct answer
Before ordering production labels, confirm which edge leaves the reel first, whether the labels face inward or outward, the print orientation at the peel plate, core diameter, maximum reel diameter, web width, label gap, liner and roll weight.
Why this matters
A correct label design can arrive unusable when the winding direction or leading edge does not match the applicator. Reel geometry also affects changeover time, web tension and available running time.
Decision table
| Reel field | Record | Check against |
|---|---|---|
| Leading edge | Top, bottom, left or right edge first | Peel orientation |
| Winding | Labels inside or outside | Unwind path |
| Core | Inside diameter and width | Mandrel |
| Outside diameter | Maximum finished reel | Machine clearance |
| Web and gap | Backing width and pitch | Sensor and tracking |
Information to collect
- Obtain the labeller reel specification.
- Create a labelled unwind drawing.
- Confirm text and barcode orientation at application.
- Measure core, web, gap and maximum outside diameter.
- Check transparent, metallic or unusual labels with the sensor.
- Trial the production liner and adhesive.
Practical method
- 1
Approve one physical reel before full print quantity.
- 2
Retain the unwind drawing with the artwork.
- 3
Mark the correct loading direction at the machine.
- 4
Set web guides without crushing the liner.
- 5
Update the specification after applicator changes.
Common mistakes to avoid
- Using “wind one” terminology without a diagram.
- Checking artwork upright on a desk rather than at the peel plate.
- Ignoring maximum reel weight.
- Changing liner or gap without a sensor trial.
- Ordering both front and back labels with incompatible pitch.
Questions people also ask
What does label unwind direction mean?
It describes how labels are oriented and wound on the reel, including the edge that reaches the peel plate first.
Do all labellers use the same unwind convention?
No. Use the machine supplier’s drawing and a physical approval reel.
Why does core diameter matter?
The core must fit and clamp correctly on the unwind mandrel.
Can transparent labels use a normal gap sensor?
Some require ultrasonic or another suitable sensing method; test the actual label and liner.
Continue from the requirement to the equipment
Use the specialist route that matches the product, pack and process. Final suitability requires representative samples, output targets and site information.