Very cool . I ' ll definitely try this . <| sep |> Some of the logbooks were actually correlated with multiple methods for tracking from different sources during the timeframe some of the logbooks were created . Barring differences in chance for error they showed enough independence to be considered a doubleblind register of data points . Accuracy and being precise are slightly different methodologies . This was from a printed study on this , and as such I do not have a link . <| sep |> This happens because it ' s often easier to melt something if it has a very high surface to volume ratio . Wierder things happen the smaller you go . Basically , temperature is just atoms jiggling around . The more the jiggling , the higher the temperature . When an atom is struck between two powder paricles , it could jiggle from one to the other because it doesn ' t really care which is which . If this happens often enough for many atoms , the two particles get welded and become a single body . So all you have to do is make a mold , fill it with powder , heat up and wait to give the atoms some time to jiggle . You could also apply a crazy high pressure tonscm 2 in order to decrease the required temperature and waiting time . The final product could be a little bit porous , but if the process is done correctly this won ' t create any major issue .