I've been reading for a while your posts and other stuff on the web about laser sintering, I've got to tell you: this is something that I don't understand much, but, in my opinion, the only way to learn is to read and discuss about it. In my opinion to sinter powders (aluminium in this case), maybe we should start to pre-heat a chamber on an Inert gas environment, yet there would be a problem,by dzrick - Powder Printing and Selective Laser Sintering