which reactant incl initiator do I need within a dispersion <20cps to initiate an exothermic reaction within a few microseconds by (which?) surface irradiation at RT, so that the dispersion (also preheatable up to 60 ° C) can reach about 200 ° C for approx 100ms in order to sinter PA12 microbeads (Ts185 ° C) that have 0.1-1μm diameter? the microbead content in the (later jetted) dispersion should be as high as possible.