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Kitchen and orders

What is a thermal printer? (Bill and KOT printer)

AppZet team3 min readLast updated 5 October 2026

Paper sizes

The common roll widths are 2 inch (58 mm) and 3 inch (80 mm). The 3-inch roll is easier to read and fits more on one line.

How they connect

Printers connect by USB, Wi-Fi, LAN cable or Bluetooth. Pick the type that suits where the printer sits and the device you bill from.

Looking after it

Keep spare rolls, store paper away from heat and sunlight, and clean the print head now and then. Thermal prints fade over time, so keep digital copies of bills.

How AppZet Billing handles it
  • Bills and KOTs print from AppZet Billing on the web and in the Android app.
  • Print KOT on the KOT screen gives a paper ticket for the kitchen.
Setup guide: Getting started: from sign-up to your first bill →

Frequently asked questions

Do thermal printers need ink?

No. They print with heat on special paper.

58 mm or 80 mm?

For most restaurants, 80 mm is easier to read. 58 mm printers are smaller and cheaper.