What thermal printing is
Thermal printing is a method of creating images on paper using heat instead of liquid ink or toner. It is the technology behind most shop receipts, shipping labels, event tickets, and wristbands. Because it needs no ink cartridges and has few moving parts, a thermal printer is cheap to run, fast, quiet, and reliable, which is exactly why it dominates places that print small items constantly all day.
Direct thermal printing
The simpler type is direct thermal printing, which uses special heat-sensitive paper coated with a chemical that darkens when warmed. A row of tiny heating elements, called the print head, touches the paper and heats precise spots to form the text and images. There is no ink at all, which makes it ideal for receipts and labels, but it also means the print can fade over time.
Thermal transfer printing
The second type, thermal transfer printing, uses a ribbon coated with wax or resin. The print head heats the ribbon, melting its coating onto ordinary paper or other materials, where it cools and sticks. This needs a ribbon as a consumable, but it produces durable, long-lasting prints that resist fading, heat, and moisture, making it the choice for barcode labels and product tags that must survive storage and handling.
Why receipts fade
The fading of old receipts is a direct result of how direct thermal paper works. Its heat-sensitive coating continues to react to warmth, light, and friction over time, so a receipt left in a hot car or a sunny window can darken all over or fade to blank. This is why important receipts are best photographed or scanned, since the paper copy is not designed to last for years.
Where each is used
The two methods suit different needs. Direct thermal is perfect for short-lived items printed in huge numbers, such as receipts, parking tickets, and shipping labels that only need to last until a package is delivered. Thermal transfer is used where prints must endure, such as asset tags, outdoor labels, and product barcodes. Many businesses own both kinds of printer for their different jobs.
The bottom line
Thermal printing forms images with heat rather than ink, using either heat-sensitive paper for direct thermal printing or a melting ribbon for durable thermal transfer printing. Its speed, low cost, and quiet operation make it the standard for receipts, labels, and tickets. Knowing the difference explains both why a receipt costs almost nothing to print and why it fades, while a barcode label lasts for years.
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See also: What is a QR code? Explained, What is haptic feedback? Explained.
Sources
Published date reflects the original event date (2026-10-23). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.
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