USG Sheetrock® Brand UltraLight Gypsum Base Imperial® panels are the lightest 1/2“ gypsum base for veneer plaster available. USG Sheetrock® UltraLight Gypsum Base Imperial panels have a distinctive blue face paper that is engineered specifically for the direct application of veneer plasters. The special multi-layered laminated face paper controls water absorption, provides maximum plaster bond and resists sag.
unspecified use of nanotechnology and colloidal chemistry
"To create its Sheetrock UltraLight Panels, USG Corporation used nanotech processes to change the way gypsum crystals bond to one another, creating stronger bonds that made it possible to reduce the amount of gypsum in each board without compromising strength." - Green Builder Media
"SHEETROCK UltraLight Panels combine USG’s proprietary formulations and processes with new patented technologies. They utilize nanotechnology and colloidal chemistry to feature a significantly higher strength-to-weight ratio and improved sag resistance." - AWCI's Construction Dimensions
"The manufacturer’s Sheetrock UltraLight panels are up to 30 percent lighter than the competition, allowing builders to install the sheets easier and faster. It’s produced from what the company calls 'proprietary formulations and processes' and features nanotechnology that results in a product with a higher strength-to-weight ratio and improved sag resistance." - Builder Online
available online (see product link)