Quick answer: To buy the best thermal paper, match your machine’s required size and core, choose high-sensitivity, long-lasting paper (ideally phenol-free), and buy from a reliable brand with clear specs and certifications.
What is thermal paper?
Thermal paper is a heat-sensitive paper used in POS printers, debit/credit terminals, kiosks, ticketing, calculators, and labelers. A thermal printhead activates the coating to create crisp, ink-free images—fast, clean, and low-maintenance.
Key factors when buying
- Compatibility: Check your machine model’s specs for roll width, diameter (outer & core), and paper type (thermal vs. bond). If you’re replacing an old roll, measure it (guide below).
- Size: Width × diameter × core size. The most common receipt size is 2 1/4" (57mm) wide for card terminals and 3 1/8" (80mm) for POS printers.
- Print quality (sensitivity): Higher sensitivity enables darker prints at lower energy, improving barcode and QR code scan rates.
- Topcoat & image stability: A protective topcoat helps resist fading, smudging, oils, water, heat, and UV.
- Core type: Plastic vs. paper cores; some terminals require a specific core size (e.g., 12.7mm / 0.5").
- End-of-roll warning: Look for a clean red stripe indicator to avoid surprise outages.
- Eco & safety: Consider phenol-free (BPA/BPS-free) and responsibly sourced paper (e.g., FSC).
- Packaging & storage: Moisture-resistant wrap and sturdy cartons reduce damage and dust.
Common sizes & how to measure
Popular receipt roll sizes
<| Use Case | Common Width | Typical Diameter | Core | Notes |
|---|---|---|---|---|
| Card terminals (debit/credit) | 2 1/4" (57mm) | 30'–50' length (≈40–50mm Ø) | 1/2" (12.7mm) | Compact housings need smaller diameter |
| POS receipt printers | 3 1/8" (80mm) | 200'–230' length (≈80mm Ø) | 7/16"–1/2" | Restaurants/retail front-of-house |
| Mobile printers | 2"–3" (50–80mm) | Varies by model | 1/2" common | Check exact model spec |
How to measure your current roll
- Width: Measure edge to edge of the paper.
- Outer diameter (OD): Measure the full roll across.
- Core (ID): Measure the hole’s inside diameter.
- Length (optional): If unknown, use the printer manual or vendor spec for your width/OD/core.
Tip: If a roll doesn’t fit, the usual culprit is diameter, not width. Choose the same width with a smaller OD.
Compatibility by device type
- Credit/debit terminals: Often 2 1/4" width and 1/2" core; many models require a specific max diameter.
- Thermal POS printers: Typically 3 1/8" width, larger diameter rolls for longer runtime.
- Kiosks/ticketing: May require specialized widths, black marks, or notches—check the exact model.
If you’re unsure, look up your machine model + “paper size,” or bring your old roll specs when ordering.
Durability & legibility over time
- Top-coated paper protects the image from oils, water, abrasion, and light handling.
- Archival/long-life grades keep text readable longer—helpful for warranties or bookkeeping.
- Proper storage (see below) dramatically extends readability.
Eco & safety considerations
- BPA/BPS-free (phenol-free): Safer chemistry, increasingly required by retailers and municipalities.
- Responsible sourcing: Look for sustainably sourced pulp (e.g., FSC claims from the brand).
- Waste reduction: Choose the right length/diameter to avoid half-used rolls that don’t fit your device.
Storage & handling tips
- Keep sealed in the original wrap until use; store in a cool, dry place away from direct sunlight and heat sources.
- Avoid contact with hand sanitizer, oils, adhesives, or plasticizers that can darken the print.
- Load the roll with the thermal side out (scratch test: the coated side turns dark when quickly scratched).
Cost vs. value
Cheapest rolls can cost more in the long run—faded receipts, scanner misreads, and reprints waste time and supplies. Choose reliable specs and coatings for fewer headaches and better customer experience.
Recommended: MilaMima thermal paper
- Popular sizes for POS and terminals (2 1/4" and 3 1/8").
- High-sensitivity, clean dark prints; smooth feed to protect printheads.
- Options for phenol-free paper and protective topcoats.
FAQs
What size thermal paper do I need?
Match the width and maximum diameter specified by your device. If in doubt, measure your old roll or check the manual.
Why do my receipts fade?
Exposure to heat, UV light, oils, and plasticizers can fade images. Choose top-coated, higher-stability paper and store rolls properly.
Is BPA/BPS-free paper worth it?
Yes. Phenol-free grades reduce exposure concerns and are increasingly preferred or required by businesses and regulators.
My roll is the right width but won’t fit. Why?
The outer diameter is likely too large for your compartment. Select a roll with the same width but a smaller diameter (or shorter length).
