Experimental #34 is another collaboration between Northstar Glassworks and Gaffer Glass in manufacturing unique UV reactive colors. This glass retains the buttery working characteristics of Exp. #19 & NS-137 Ill-uminati that has become a signature of glasses produced with this partnership. The light blue rod is color stable in the flame and allows UV light to fill the piece while retaining its beautiful color while under natural light. We recommend a UV light source with 365-395 nm range for the brightest reactivity. No uranium is used in this glass.