4 ms·Depends on whether or not the soot is transparent on the part of the spectrum the laser operates at.by mkr-hn 16y agoDepends on whether or not the soot is transparent on the part of the spectrum the laser operates at.ars 16y agoSoot is one of the blackest materials known. It absorbs light in a very wide range.T_S_ 16y agoI had an eye operation using a YAG laser. Whatever is not transparent gets heated up and destroyed fast. The blacker the better.