The material data sheet for PA 2200 at http://www.shapeways.com/rrstatic/material_docs/mds-strongfl ex.pdf says: Bulk density EN ISO 60 0.45 g/cmÂ³ Density of laser-sintered part EOS method 0.93 g/cmÂ³ So the density of a printed part is 0.93g/cm3. Correct? Why this difference for the bulk density? The bulk density is the density before the material is processed? I want to make a part that will be inside water but almost floating.