Which thermal paper does your printer need: 80 mm receipt rolls, 100×150 labels and compatibility (2026)

If you're looking for the consumable for a thermal printer, the short answer is simple: it needs neither ink nor toner, only thermal paper. All of these printers use direct thermal technology, meaning they print by applying heat from the printhead onto heat-sensitive paper that reacts by darkening. You only need to get two things right: the format (receipt rolls or labels) and the dimensions. For a POS-style receipt printer, the standard is 80 mm wide rolls; for a shipping label printer, 100×150 mm labels. And always, under European regulations, BPA-free paper.

• No ink, toner or ribbon: the only consumable is the thermal paper that reacts to heat.
• Receipts/POS: 80 mm wide receipt rolls (models such as the KW-M806 and the KW-M804).
• Shipping and logistics: thermal labels, with 100×150 mm as the standard, in label printers that take up to 108 mm in width.
• Mandatory in the EU: BPA-free / phenol-free paper (Reglamento (UE) 2016/2235).
• No lock-ins: they accept generic rolls from any supplier; you only pay for the paper.

No ink, no toner: how direct thermal works

The big difference compared with a laser or inkjet printer is that here there's no cartridge to replace. Direct thermal generates the image by applying heat onto special paper coated with a heat-sensitive layer: wherever the printhead heats it, the paper darkens. That's why it uses no ink, no toner and no ribbon. The only consumable is the thermal paper, whether in rolls or in labels.

This has a very handy practical upside for your wallet: the cost per copy is just the paper, with no ink or toner replacements. If you're coming from comparing consumables of other technologies, you'll find our guide on ink cartridge or toner useful to see how they differ, and the one on the real cost of printing to work out what you really spend. If you're still deciding which kit to set up in your business, the pillar guide thermal printer for businesses helps you choose a model, and you can see the available equipment in the thermal printer collection.

80 mm rolls for receipts: what to check before buying

Receipt and point-of-sale printers, such as the KW-M806 and the KW-M804, use 80 mm wide receipt rolls. It's the standard width in most shops, bars and stores. On the software side, these receipt printers speak ESC/POS, the most widespread language for POS systems, so they usually integrate without trouble with most till software.

Even though the roll may look like a generic consumable, it's worth checking four parameters before buying so it fits well and doesn't leave any slack or cause jams:

• Width (mm): for these receipt models, 80 mm.
• Roll outer diameter: determines how many metres it holds and whether it physically fits in the compartment.
• Core diameter: the inner tube; it must fit onto the printer's spindle.
• Direction of the thermal side: the heat-sensitive side must face towards the printhead. If you load the roll the wrong way round, it prints nothing even though the machine works perfectly.

A quick trick to tell which is the thermal side: scratch the paper with your fingernail or a coin; the side that leaves a dark mark is the heat-sensitive one, and that's the side that goes towards the printhead.

100×150 thermal labels and other formats

For e-commerce shipping, logistics and warehousing, label printers come into play, such as the KW-D464B and the KW-430B, which work with thermal labels rather than continuous receipt rolls. The star size is 100×150 mm, the standard shipping label demanded by most carriers and marketplaces. These label printers take paper up to 108 mm wide, so you have room for other formats besides the classic 100×150.

When choosing labels, look at these three points:

• Size: 100×150 mm for shipping; there are others for prices, barcodes or internal logistics.
• Format: die-cut on a roll, continuous, with a black mark or fan-fold (accordion-folded). The format must match what your printer expects in order to cut and position correctly.
• Compatible width: it mustn't exceed the machine's maximum (remember, up to 108 mm on these label printers).

As for labelling languages, the KW-430B is highly versatile: it supports ZPL, EPL, DPL and TSPL, the most common standards, which makes it easy to integrate with existing logistics systems. In the case of the KW-D464B, what's stated is cross-platform compatibility (Windows, Linux and Mac) and an SDK for Android and iOS, ideal if you need to print labels from your phone or from your own app. You'll find both label printers and the receipt printers in the thermal printer collection.

Direct thermal vs thermal transfer: don't confuse them

This is the costliest mistake and the one that causes the most returns. There are two labelling technologies that look alike but aren't interchangeable:

• Direct thermal: needs no ribbon. It's the one in these models and the ideal choice for receipts, order tickets and e-commerce shipping, where the label does its job within days or weeks.
• Thermal transfer: uses a ribbon that melts ink onto the label. It lasts years without fading, so it's the right one for long-lasting labels: assets, permanent inventory, exposure to sunlight or abrasion.

The consequence of getting it wrong is concrete: if you use direct thermal where thermal transfer was needed, after 60-120 days the barcode becomes illegible and stops scanning. For shipments delivered within a few days it's fine; for labels that have to last months or years, you need thermal transfer with a ribbon. These printers are direct thermal, so their paper takes no ribbon: perfect for the flow of receipts and shipping.

BPA-free thermal paper: what EU law requires

It's not just a health recommendation, it's a legal obligation. In the European Union, thermal paper must be free of bisphenol A (BPA). Reglamento (UE) 2016/2235 has, since 2 January 2020, banned thermal paper containing BPA at a concentration of 0.02% by weight or more. You can consult the official text on EUR-Lex.

In practice, always buy rolls and labels marked as "BPA-free" or "phenol-free". It's the right thing for anyone handling receipts daily (till staff) and it's what keeps you compliant. All the thermal paper we offer meets this regulation, within our ISO 9001 quality controls. If you're interested in where the sector is heading, take a look at the 2026 printing trends.

Compatibility, storage and guarantee

Good news for your budget: these printers accept generic rolls from any supplier. There are no proprietary chips or firmware locks; you only pay for the paper, with no brand premium. That gives you the freedom to buy the consumable wherever suits you best, always respecting width, diameters and the requirement to be BPA-free.

To stop the print from fading prematurely, look after the paper's storage:

• Keep the rolls in a cool, dry place.
• Keep them away from heat and direct sunlight.
• Avoid contact with solvents and with plasticisers (PVC): PVC sleeves, folders or tapes can erase the thermal print.

That's why a receipt left in a car's glovebox in summer ends up blank: it's heat and light, not poor paper quality. At Startoner we dispatch within 24-48 h from Spain (mainland), with customer support and a 3-year legal guarantee. And if you also print in colour with other equipment, our downloadable CMYK print test page may help, or reviewing the legal guarantee for compatible consumables in Spain.

Frequently asked questions