What to Know About Labels That Come on Rolls
Labels on rolls are everywhere — in warehouses, on product packaging lines, and behind the scenes of your favorite e-commerce store. But buying or using the wrong kind can grind things to a halt. Whether you’re labeling by hand or through an automated system, here are the key things to understand about roll labels.
Roll and Core Size
Every printer and applicator has limitations on how big a roll it can handle. If the roll is too wide or the core doesn’t fit, it simply won’t work.
- Common core sizes: 1″, 1.5″, and 3″ are standard — with 3″ used in most industrial printers
- Outer diameter (OD): Often limited by your machine; some desktop printers max out at 5″, while larger ones may accept 8″ or more
Larger rolls with more labels mean fewer roll changes, but they also require printers that can handle the bulk. Some operations prefer smaller rolls for easier handling, while high-volume operations want the largest roll the printer can manage.
When it comes to label shape and size, uniformity is your friend. Irregularly shaped or very small labels can jam equipment or misalign during application. Rounded corners peel more cleanly from the liner and apply more easily to curved surfaces.
Label Orientation
Another often-overlooked factor is winding direction — essentially, how the label is oriented on the roll. This becomes especially critical if you’re using an automatic label applicator or a specific kind of printer.
There are 8 standard unwind positions, depending on whether the label is face-in or face-out and which edge leads:
- Top edge first (Unwind Position #1) is common for front-facing product labels
- Bottom or side leading may be required for odd-shaped packages or wraparound designs
Choose Material and Adhesive wisely
When choosing label material and adhesive, remember: the roll format adds another layer of requirements. Not all materials wind well — especially in tight rolls.
- Thicker materials or rigid films like polyester may require larger core sizes to prevent curling or wrinkling on the roll.
- Adhesives can ooze under pressure — tightly wound rolls in warm environments may cause edge bleeding, where adhesive leaks out from under the label edges. This is especially true for strong adhesives.
Gap Sensing and Perforations
Most thermal printers and auto-applicators rely on some method of detecting where one label ends and the next begins — this is where label sensing comes in. When labels come on rolls, this sensing depends entirely on how the labels are spaced and formatted on the liner.
- Gap sensing requires consistent spacing between each label on the roll. If the gap is off or inconsistent, the printer may skip or double-feed.
- Mark sensing involves a black registration mark printed on the back of the liner. These marks must align precisely with label edges as the roll advances.
Perforated liners allow for easy manual tearing between labels. Pers are useful if labels are hand-applied from the roll.
Considering giving roll labels a try? Contact us today and we can help you get started!