She held each mirror at arm’s length, tilted it toward the fluorescent bars, and looked through herself.
That was the trick. New hires always got stuck on their own face — adjusting their hair, checking the corner of a lip. Marie had trained herself out of that in the first week. Your reflection was the noise. The signal was behind it.
Bubbles showed up as dark crescents when you caught the light at thirty degrees. Silvering defects looked like watermarks — faint clouding where the metal hadn’t bonded. Distortion you found by holding a straight edge behind the glass and watching for the bend. She could clear a mirror in under four seconds.
Four hundred a shift. Her face, four hundred times, each time unseen.
The line moved at a fixed speed. Pick up, tilt, scan, rotate, scan again, set down. Reject bin to the left. Pass bin to the right. Her hands knew the weight before her eyes found the edge. Seventeen years of this had made the motion continuous — one long examination broken into individual mirrors the way a sentence is broken into words.
Danny, six days in, kept pausing the line.
“How do you not see yourself?”
She shrugged. It wasn’t something you decided. It was more like the factory hum — present for the first twenty minutes, then gone. Not muffled, not ignored. Just no longer the kind of thing that registered.
What she didn’t tell Danny was that it went the other direction too. At home, brushing her teeth, she’d catch herself inspecting the mirror instead of the face in it. Scanning for inclusions in the float glass. Testing the evenness of the coating by the way the fluorescent tube above the sink laid its line across the surface. Her bathroom mirror had a silvering defect in the lower left corner — a faint milky patch the size of a thumbprint — and she couldn’t stop seeing it. Some mornings it was more present than her own eyes.
A perfect mirror was invisible. You only saw the mirror where it failed.
She reached for the next one. Tilted, scanned, found nothing. Set it in the pass bin. Reached again. The line didn’t pause for the ones that were flawless.