Fig. 6
From: Feasibility of ultrafast picosecond laser cleaning of soiling on historical leather buckles
(Left) An effective non-complete laser cleaning result for removal of soiling particles on the historical vegetable tanned leather surface using ps emitting at 1064 nm using fluence 2 J cm−2 and 1 scan (OM 10x). Right satisfactory cleaning results for removal of soiling particles on the historical vegetable tanned leather surface using ps emitting at 1064 nm using fluence 2 J cm−2 and 3 scans OM 10×)