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What thermal paper specification should I use for receipt printers?

A: Standard thermal receipt paper: 80mm wide × 80m roll for most POS printers. Paper weight: 48–55 g/m² (heavier paper provides better print quality and head longevity). Coating: bright white BPA-free thermal coating for retail receipts. For kitchen printers: high-temperature thermal paper (rated to 100 deg C) if using thermal in kitchen environments — standard thermal paper fades at kitchen temperatures. Always use the paper width and roll diameter specified by the printer manufacturer — thicker rolls may not fit the paper compartment.

What is ESC/POS and why is it important for POS printer integration?

A: ESC/POS (Epson Standard Code for Point-of-Sale) is the de facto command language for thermal receipt printers — developed by Epson but used industry-wide. It enables POS software to control print formatting: text size, bold, underline, alignment, barcode printing, QR code printing, and paper cutting through simple command codes. All major POS software platforms (Tally, Petpooja, WinPOS) and online ordering platforms (Swiggy, Zomato) send ESC/POS commands to receipt printers. Verify ESC/POS compatibility before purchasing — some budget printers use proprietary command sets.

What is the difference between a thermal and impact (dot matrix) receipt printer?

A: Thermal receipt printers: fast (200–300mm/sec), silent, low maintenance, clean output — standard for retail and customer receipts. Paper fades over time (typically 7–15 years depending on paper quality and storage). Impact (dot matrix) printers: slower (4–6 lines/sec), noisy, can print on multi-copy carbon paper, prints reliably in hot/steam kitchen environments where thermal paper would fade. Impact is preferred for kitchen order tickets (KOT) where heat and steam from cooking could fade thermal receipts.

Can a receipt printer connect to a mobile POS on Android or iOS?

A: Yes — Bluetooth receipt printers (Epson TM-m30, Star SM-L200, Bixolon SPP-R200) connect to Android and iOS tablets and smartphones. Most manufacturers provide free SDK for both platforms. Configuration: pair Bluetooth in device settings, install printer app or integrate SDK into POS app, and send ESC/POS commands. For restaurant table-side ordering apps (Petpooja, Posist), verify the app's supported printer model list before purchasing — not all printers are pre-configured in all apps.

What print speed is needed for a busy QSR or retail checkout?

A: Standard retail checkout (convenience store, pharmacy): 200mm/sec is adequate for most transactions. Busy supermarket checkout: 250mm/sec recommended — reduces checkout time at peak hours. High-throughput QSR (McDonald's, Domino's speed): 300mm/sec printers (Epson TM-T88VII) reduce receipt time to under 2 seconds for standard receipt. For kitchen order tickets: 4–6 lines per second (impact) is the relevant metric — 1 KOT typically takes 2–4 seconds to print at this speed.