Heat instead of ink

Label & thermal printers

Shipping labels, receipts and barcodes printed with heat, often with no ink at all.

Upfront cost: Low
Running cost: Low
Speed: High
Color: Usually no

Independent guide — not affiliated with any manufacturer. For warranty or official support, contact the maker of your printer.

Overview

Direct thermal printers use special heat-sensitive paper that darkens where it is warmed. A row of tiny heating elements in the printhead switches on and off as the label passes underneath, so there is no ink, toner or ribbon to buy.

A related method, thermal transfer, uses a ribbon that melts its coating onto the label for longer-lasting results. Either way, these printers are specialists: superb for labels, receipts and barcodes, and not meant for letters or photos.

How it works

Diagram is illustrative, not to scale.

Labels unwind from a roll

A spool of labels or receipt paper feeds steadily through the printer.
The head heats in dots

A fixed row of tiny heaters, one per dot across the width, turns on wherever the image needs to be dark.
Heat-sensitive paper darkens

Coated thermal paper changes color instantly where it is warmed. In thermal transfer, a ribbon melts onto the label instead.
The label tears or peels off

A sensor finds the gap between labels so each one stops in the right place.

Pros and cons

Advantages and drawbacks of label & thermal printers
Pros	Cons
No ink or toner for direct thermal models	Direct thermal prints fade with heat and sunlight over time
Fast and quiet for labels and receipts	Needs special label or thermal paper
Very few moving parts	Usually black only
Sharp barcodes that scan reliably	Not for regular documents or photos

Best for

Online sellers

Shipping labels printed in seconds, one after another.
Organizing

Pantry, garage, cable and file labels.
Small shops

Receipts, price tags and barcodes.

What it costs to run

Direct thermal printers have no ink or toner, so the only ongoing cost is the label stock. Thermal transfer printers add the cost of ribbons.

Cost per label depends on size and material; compare rolls by price per label rather than per roll.

If labels must last for years, or face sunlight or heat, thermal transfer labels are usually the better buy despite the ribbon.

Prices and page yields vary by model and change over time, so we do not quote figures here. Our guide to calculating cost per page shows how to compare any two printers yourself.