Producing glass objects using 3D printing is not easy. Only a few groups of researchers around

Producing glass objects using 3D printing is not easy. Only a few groups of researchers around the world have attempted to produce glass using additive methods. Some have made objects by printing molten glass, but the disadvantage is that this requires extremely high temperatures and heat-resistant equipment. Others have used powdered ceramic particles that can be printed at room temperature and then sintered later to create glass; however, objects produced in this way are not very complex. Researchers from ETH Zurich have now used a new technique to produce complex glass objects with 3D printing. The method is based on stereolithography, one of the first 3D printing techniques developed during the 1980s. David Moore, Lorenzo Barbera, and Kunal Masania in the Complex Materials group led by ETH processor André Studart have developed a special resin that contains a plastic, and organic molecules to which glass precursors are bonded. The researchers reported their results in the latest issue of the journal Natural Materials. The resin can be processed using commercially available Digital Light Processing technology. This involves irradiating the resin with UV light patterns. Wherev...

Sig Sauer Unveils Commemorative Pistol To Honor Navy SEAL Medal Of Honor Recipient

In May 2018, President Donald Trump awarded retired Navy Master Chief Britt K. Slabinski the Medal of Honor for his heroic actions while leading a Joint Task Force during Operation Anaconda in Afghanistan. Now Sig Sauer is paying tribute in its own way. This past National Medal of Honor Day, the gunmaker unveiled a specially-designed commemorative P226 pistol — the same pistol that SEALs carried under the official MK25 designation — to honor Slabinski’s receipt of the the nation’s highest award for valor. The commemorative pistol includes ceremonial 24k gold engravings on both sides of the slide: “For Service As Set Forth,” the first line of Slabinski’s award citation, on the right side, and “No Day Shall Erase You from the Memory of Time, which is featured at the World Trade Center Memorial in New York City, on the left. The top of the slide features a likeness of the Medal of Honor engraved on a piece of metal recovered from the World Trade Center site, as well as six stars to honor SEAL Team Six. The grips, custom made from American Black Walnut, feature the Red Unit Medallion on the right and the SEAL Trident on the left. As if the pistol ...