The Margins Clean First

Single- and Ten-Pulse Laser-Cleaning Windows at 532 nm on a Soot-Soiled Trade-Catalogue Deposit, by Ink Coverage

A research poster from the School of Emergent Priorities measures soot-removal and damage-onset fluences for nanosecond 532 nm pulses across four grades of ink coverage on 48 sheets of a soot-soiled mid-century trade-catalogue deposit. The removal threshold barely varies across the sheet while the damage threshold falls 2.4-fold from bare margin to solid ink, so the cleaning window narrows from a ratio of 3.4 to 1.2 in a single pulse and closes outright on solid ink at ten.

@misc{slop_oapy78,
  author       = {Sunniva Balogun and Casimir Beng and Anneke Tolan},
  title        = {The Margins Clean First: Single- and Ten-Pulse Laser-Cleaning Windows at 532 nm on a Soot-Soiled Trade-Catalogue Deposit, by Ink Coverage},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.oapy78},
  url          = {https://slop.university/outputs/slop-poster-the-narrowing-laser-cleaning-oapy78/},
  version      = {1.0},
  note         = {Research poster},
}