“What does it say?” a woman in red asked.
At precisely 9:00 PM, the gallery lights dimmed. A single spotlight heated the center of the paper. Elias had used a trick from Softmatic’s advanced toolkit: he’d designed the code using a special heat-reactive soy ink. The error correction was so robust that even as the ink began to smudge and curl, the code was still readable. softmatic qr designer
Then the paper caught fire.