How to Spot Poor Quality Thermal Paper Before Buying

Why the cheapest rolls usually cost you more

Thermal paper looks simple, but it is a coated product. A chemical layer on the surface reacts to the heat of your print head, and that layer is where the difference between good and cheap stock lives. Skimp on it and you get receipts that fade within weeks, smudge onto customers' fingers, or print so faintly that staff squint at the till. That is before you count the reprints, the refunds you cannot evidence, and the odd VAT receipt that has turned into a blank strip by the time your bookkeeper sees it.

There is a hardware cost too. Dusty, poorly coated paper sheds more residue, and that grit sits against the print head. A replacement head often costs more than a year's worth of the few pence per roll you saved. Judge paper by the cost of a legible receipt, not the price on the box.

Start with the coating and the feel of the paper

Before you print anything, handle the roll. Quality thermal paper feels smooth and faintly glossy on the coated side, with an even sheen across the whole surface. Cheap stock tends to feel chalky, dry or slightly gritty.

• Rub a thumb across the surface. If it leaves a powdery trace or feels rough and papery, be wary.
• Check the reverse. The back should be plain and evenly coloured, with no blotches, dark speckles or streaks.
• Hold it up to the light. The coating should look uniform, not cloudy or patchy.
• Look at the cut edges. Clean, with no ragged ends and no loose dust in the bag.

On weight, 48gsm to 55gsm is the practical sweet spot for till rolls. Anything around 40 to 45gsm feels flimsy, curls badly and jams in tight feed paths. Heavier stock feels reassuring but check your printer can cope with the thickness before ordering a case.

Run three quick tests before you commit to a box

The coin test is the fastest indicator. Draw a firm line along the coated side with the edge of a coin. Good paper develops a sharp, dark line almost immediately. Poor paper gives a pale, grey or patchy line, and you may find yourself going over the same spot twice.

Next, the fade test. Print a sample receipt with small text, a barcode and fine detail. Put one copy on a sunny windowsill and keep a second in a drawer as a control. Check both after three days and again after a week. Decent top-coated stock will still be readable and the barcode will scan; bargain paper can be halfway to blank.

Finally, the everyday abuse test. Rub a receipt with hand cream or hand sanitiser, run a highlighter over a line, and press a strip of clear tape across the print. These mimic what happens in a pocket, a wallet or under a customer's thumb. If the text vanishes in seconds, that is what your customers will see.

Judge the packaging and how it has been stored

Packaging tells you a great deal about a supplier's standards. Rolls should arrive shrink-wrapped in film, ideally opaque or light-blocking, not rolling loose in a cardboard box. Ends should sit flat against each other and the cores should be rigid, straight and strong. A crushed or warped core makes the roll wobble, which causes jams and misaligned printing.

The outer box should be clearly labelled with width, diameter, core size, grammage and quantity, plus whether the paper is BPA-free. Vague labelling often means vague sourcing. Ask how the stock is warehoused, because paper that has sat in a hot van or a damp stockroom will already be compromised before it reaches you.

At your end, store rolls between roughly 15°C and 25°C, out of direct sunlight and away from radiators, and rotate stock first in, first out. Keep paper away from cling film, plastic wallets, adhesives, solvents and hand sanitiser, all of which can erase thermal print. Good stock usually carries a shelf life of three to five years; cheap stock often gives up far sooner.

Match the roll to your printer, not just the price

Measure before you buy. The core diameter matters as much as the roll width: a 12mm core in a printer designed for a 25mm core will rattle and feed unevenly. Common sizes include 57mm wide by 40mm diameter for handheld and mobile units, and 80mm by 80mm for countertop tills, but confirm against your own machine.

Also ask for metres per roll, not just diameter. Two suppliers can sell an "80 x 80" roll with noticeably different lengths, which changes your real cost per receipt. If you print warranty paperwork or records you need to keep, choose a longer-life grade and say so.

Ask the right questions and buy in sensible quantities

A good supplier will answer these without hesitation:

• What is the grammage and is the paper top-coated?
• Is it BPA-free or BPS-free?
• How many metres are on each roll, and what is the core diameter?
• Can I have a sample box to trial?

Order a small box first, run it for a fortnight across your busiest till, and note the batch number and the date you opened it. If a later delivery behaves differently, you have the evidence to raise it. Switching suppliers is easy; recovering your reputation after a month of unreadable receipts is not.