A German Company called Diamond Plastics has announced a brand new material for plastic laser sintering machines. The plastic powder, called HDPE HX 17 prints high quality objects with glossy finishes. The material is also extremely resistant to common solvents such as oils, alcohol, acids, and bases. More details on this new material can be found here: http://3dprint.com/10701/diamond-plastics-powder-3d

Some of the Properties of HDPE HX 17 are as follows:
Medium particle size: 50 microns
Maximum particle size: 80 microns.
Recommended layer height: 100 microns

Below is an image printed with the powder: