Gone are the days when glassblowing and glass art were equal. Now, there are numerous approaches and techniques to working with glass as an art medium. A couple of definitions may be helpful to you if you are somewhat new to the world of modern glass art.
BLOWN GLASS: The most traditional and oldest method for working with glass is glassblowing. This entails heating
glass in a furnace, collecting some molten glass on the end of a blowpipe and blowing a bubble of glass. Glassblowing can result in something as easy as a Christmas tree ornament or as complex as a masterpiece by famed Lino Tagliapietra. The names of a few celebrated artists who use glassblowing as their primary method are Dan Dailey, Dale Chihuly, Marvin Lipofsky, Dante Marioni, Lino Tagliapietra, and William Morris.
CAST GLASS: Casting glass entails melting glass in a furnace and pouring it into a made up form. Molten glass can be poured into a clay, plaster, or clay mold. Also, molds are at times used in glassblowing, particularly in production pieces. A few famous artists who use glass casting as their primary method are Daniel Clayman, Alex Bernstein, Charles Miner, Steven Weinberg, and Robin Grebe.
COLD GLASS/FABRICATED GLASS: To state the obvious, cold glass working does not involve heat. A glass artist using cold glass methods may laminate, with high tech glue, two or more pieces of glass together. This is the most common technique for cold glass working. There are some artists who actually begin with a piece of solid glass and carve it into its final form using diamond saw cutting, hand tool cutting, and sandblasting. A few of the well-known glass artists using cold glass methods are Christopher Ries, Martin Rosol, and Jon Kuhn.