A thermal ribbon is an ink layer that is melted onto the label
A thermal transfer ribbon (TTR) is a polyester film with a backcoating that protects the printhead and an ink layer on the front. That ink layer is a blend of natural wax and synthetic resin, and the ratio of the two defines everything about the ribbon.
| Parameter | Wax | Wax/Resin | Resin |
|---|---|---|---|
| Resin content | 0% | Roughly 35-55% | 100% |
| Melting point | Low, about 65-75 C | 75-90 C | 95-125 C |
| Maximum print speed | Very fast | Fast to medium | Medium to slow |
| Scratch resistance | Low | Good | Excellent |
| Alcohol and solvent resistance | None | Some grades | High |
Wax suits high volume paper work
Wax melts at a low temperature, so it soaks into paper fibres, needs less printhead heat, and prints fast. It is the right grade for paper labels, cartons, and price tags, but it sits on top of smooth film surfaces and rubs off easily.
Wax/Resin is the practical middle ground
Adding resin helps the ink bond to PP and PET film, improves scratch resistance, and tolerates light oil and water contact. It is the most widely used grade for product bottles, component labels, and chill room stickers.
Resin is for chemical and heat extremes
Pure resin gives the sharpest and most durable print, so it is used with Polyimide and PET for SMT PCB work, chemical drums, and engine bay parts. It costs more and needs higher printhead heat, so check the printer specification before switching an entire line.
How to test a ribbon before changing the whole line
- Print at the same speed and darkness the production line actually uses.
- Rub with 70% isopropyl alcohol to the standard required on site.
- Verify barcode grade with a verifier rather than by eye.
- Run start-stop cycles to see whether ink smears on the printhead.
MNARA supplies sample rolls for testing on your own printer and labels, so a specification change can be proven before it reaches the production line.
