Label Application Guide
Roll Specs for Hand and Machine Application
Labels feed and apply correctly only when the roll matches your applicator. The core size, outer diameter, unwind direction and gap all have to be right. This guide explains how labels are applied by hand or machine and the roll specifications a labeling machine needs, so your labels run without jams, mis-feeds or labels applied the wrong way round.
Roll spec diagram
Applying Labels by Hand or Machine
How you apply labels changes what the roll needs to be. Hand application is forgiving; a machine needs the roll built to exact specs.
Hand Application
Labels applied by hand suit small runs, samples and irregular shapes. They can be supplied on rolls or sheets and are more forgiving of exact roll specs.
- Best for — short runs, prototypes, launches and odd-shaped items.
- Supplied as — rolls or sheets, whichever is easier to peel and place.
- Roll specs — flexible; core and unwind matter less when placing by hand.
Machine Application
An applicator applies labels at speed for higher volumes, but needs the roll built to its exact core, outer diameter, unwind and gap so the line runs cleanly.
- Best for — production volumes and consistent, high-speed placement.
- Supplied as — rolls built to the machine's core, OD and unwind.
- Roll specs — precise; core, OD, unwind and gap must match the applicator.
Roll Core Size and Outer Diameter
Two roll dimensions decide whether a roll fits your machine — the inner core and the finished outer diameter. Both are common industry sizes, but the right ones depend on your applicator.
Core Size
The inner core diameter fits over the applicator's mandrel. Common industry sizes are used across most machines. Send the one your applicator takes.
76 mm / 3 in 40 mm / 1.5 inOuter Diameter (OD)
The finished roll diameter must stay within the maximum your machine can hold. A larger OD means fewer roll changes, but only up to your applicator's limit.
Built to machine capacityMatch to the Machine
Supply your applicator's core and maximum OD, and we build the roll so it loads onto the mandrel and runs through the line without over-filling.
Core + max OD to spec
Choosing the Right Unwind Direction
Unwind direction sets which way the label faces as it comes off the roll. There are eight standard positions, and the machine needs the right one specified.
- Eight positions — the label's orientation and whether it leads from the top, bottom, left or right gives eight standard unwind positions.
- Why it matters — the wrong unwind can apply a label upside-down or mirrored on the line.
- Specify it — tell us the unwind position (1–8) your applicator needs, or send the applicator model and we will match it.
Gap, Spacing and Wind Direction
How labels sit on the liner affects sensing and feeding. The gap, the number across and the wind all decide how cleanly the roll runs.
Gap
The space between labels lets the applicator's sensor find the leading edge of each label. Too small a gap and the sensor cannot separate one label from the next.
Labels Across
Labels can run in one lane or several across the web, depending on the label size and the machine. More across the web can mean more labels per roll for wider applicators.
Wind
Labels are wound facing in or out on the roll, set by the applicator. Wind in or wind out pairs with the unwind direction so the label reaches the surface the right way round.
What Your Applicator Needs
A quick spec list gets your roll built right the first time. Send these seven details and we build the roll to load and run.
Why Brands Choose CNNLABEL for Applied Labels
Rolls built to your applicator, for hand or machine application — with a standard MOQ from 200 pcs.
Roll / Sheet / Fanfold
The format your workflow needs — supplied on rolls, sheets or fanfold to feed hand or machine application.
Core & OD to Spec
Rolls built to your machine's core and maximum outer diameter, so they load onto the mandrel and run.
8 Unwind Directions
The exact unwind position your line needs, so labels reach the surface the right way round.
Gap & Wind to Applicator
Sensing gap and wind direction set for your machine, so the roll feeds cleanly without mis-reads.
Hand & Machine Ready
Labels supplied for manual placement or automatic application, matched to how you apply them.
Delivered Ready to Load
Rolls arrive already built to your core, OD and unwind, so they go straight onto the mandrel.
Label Application FAQs
Hand suits small runs and irregular shapes; a machine suits higher volumes but needs the roll built to its core, OD, unwind and gap.
It depends on your applicator. Common industry sizes are 76 mm (3 in) and 40 mm (1.5 in). Send your machine's core and we build to it.
It is the finished roll diameter. It must stay within the maximum your machine can hold, or the roll will not fit the applicator.
Which way the label faces off the roll. There are eight standard positions, and the wrong one applies labels the wrong way round.
The applicator's sensor uses the gap to find each label's leading edge, so the machine can dispense one label at a time.
Whether labels face in or out on the roll, set by your applicator, so the label reaches the surface the correct way round.
Core, maximum OD, unwind direction, gap, label size, material and your applicator model or line speed — or just the machine make.
Get Labels Built for Your Applicator
Tell us your applicator specs, label size and order quantity, and our team builds the roll to feed and apply correctly.