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Sep 14, 2020 at 13:16 comment added Dirk Bruere @paulusvanderEnd Almost any dye would be suitable since it is very near IR. You could try en.wikipedia.org/wiki/Rhodamine_B
Sep 14, 2020 at 10:20 comment added paulus van der End Maybe the dye could work, only the dye should be compatible with an IR laser.
Sep 14, 2020 at 9:38 history answered Dirk Bruere CC BY-SA 4.0