How long do thermal labels last? Heat, light, water and top coating
Thermal labels don't last forever, but the right paper, stored sensibly, lasts as long as you need. Here's what damages them and how to avoid it.
Everyone has found a till receipt that's gone blank at the bottom of a wallet. Thermal labels use paper from the same family, so it's a fair question: will they fade too?
It mostly comes down to two things: the quality of the paper and the conditions the label lives in.
What damages a thermal label
- Heat: above a certain temperature the coating reacts and the label turns grey or black. Keep labels away from car dashboards in summer and radiators.
- Sunlight and UV: long exposure makes the print fade.
- Rubbing: parcels rub against each other in sorting centres. Unprotected paper scratches and the barcode stops scanning.
- Moisture, grease and some plastics: water, oils, alcohol or PVC film can attack the surface.
How long do they stay readable?
As a rough guide, a well-stored thermal label stays readable for anything from a few months to more than a year. For a shipping label that travels for a few days, that's plenty. For labelling that has to last years, thermal transfer is the better choice.
Plain thermal paper or top-coated?
This is where the real difference lies.
| Plain thermal paper | Top-coated thermal paper | |
|---|---|---|
| Protective layer | No | Yes |
| Scratch resistance | Low | Good |
| Moisture resistance | Low | Good |
| Typical use | Till receipts | Shipping, stock and warehouse labels |
All our thermal labels on rolls are top-coated. The protective layer shields the print from rubbing and moisture, which is exactly what matters in a warehouse or sorting centre.
Storing your rolls
- keep them in their packaging until you need them;
- somewhere dry, at room temperature, out of direct sunlight;
- don't leave them on anything warm, even slightly (laptop, laser printer).
Stored like that, a roll prints just as well months later as on day one.
FAQ
Are thermal labels waterproof?
Not fully. Top-coated labels handle moisture and splashes well, but soaking them in water for a long time will damage them.
Why has my label turned grey or black?
It's been exposed to strong heat. Thermal paper reacts to temperature, so avoid direct sun, radiators and hot vehicles.
Can thermal labels be used in the fridge?
Yes, cold doesn't make the print fade. Just make sure the surface is dry when you apply the label.
