A logo built for a four color website header shows up at the top of a receipt, printed on thin thermal paper by a printer that has been in the stockroom since before the brand was redesigned. Fine gradients collapse into a gray smear. Thin strokes vanish entirely. A mark that looked sharp on every screen anyone reviewed it on becomes an unrecognizable blob the moment it hits the one piece of hardware nobody tested against.
Why the receipt is the honest test
Thermal receipt printers are low resolution, single color, and often poorly maintained, which makes them one of the harshest environments a logo will ever face and also one of the most frequent. Every transaction a customer completes in person produces a receipt, and that receipt carries the logo whether anyone planned for it or not. A mark gets evaluated against beautiful mockups and high resolution screens constantly, and against the actual printer at the actual register almost never, even though the register sees the logo far more often than most of the polished contexts it was designed for.
What survives a bad thermal printer
- Bold, simple shapes with enough weight to survive heat printing at low resolution, rather than fine detail that depends on precision the hardware cannot deliver
- A single color version built and tested specifically for this context, not a color mark converted to black and white as an afterthought
- Enough contrast between the mark and whatever thin, scratchy printing the hardware actually produces, not the clean preview on a design file
- Acceptance that the receipt will never look premium, and designing for legible instead of impressive in that one specific context
None of this requires redesigning the logo around its worst case use. It requires testing the single color, low resolution version against an actual thermal printer before assuming the brand guidelines cover it, since a PDF export looks nothing like a register spitting out a strip of paper.
A logo is judged by its best context in every design review and by its worst context on every single receipt a customer actually takes home.
Print a real receipt before calling the guidelines finished
Take the single color file to an actual point of sale printer and print it, the cheap one, not a demo unit, before signing off on the brand guidelines as complete. Five minutes with real hardware catches a failure months of screen based review will never surface.