All About Glass

All About Glass

This is your resource for exploring various topics in glass: delve deeper with this collection of articles, multimedia, and virtual books all about glass. Content is frequently added to the area, so check back for new items. If you have a topic you'd like to see covered, send us your suggestion. If you have a specific question, Ask a Glass Question at our Rakow Research Library.

Vasenpokal | Techniques of Renaissance Venetian-Style Glassworking
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This video shows the vessel being made in a sequence of steps, one of which includes the use of a full-size blow-mold. The manufacturing process for the lid is then shown. Learn more about this object in The Techniques of Renaissance Venetian-Style Glassworking by William Gudenrath. Between about

Turquoise Pot | Techniques of Renaissance Venetian-Style Glassworking
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This video begins with the making of the different canes and bands required. After these elements are rolled up on the end of a blowpipe, the open-ended cylinder is lined with colorless glass using the sbruffo method. Glassblowing is then employed to make the vessel. The handle is fashioned from

Swedish Covered Goblet | Techniques of Renaissance Venetian-Style Glassworking
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This video shows, first, the four elements of the goblet and a fifth element for the finial of the lid being made and placed in an oven. Next, the assembly process begins. After the foot element has been attached to a pontil, the other parts are added and adhered together using small amounts of

Verzelini Goblet | Techniques of Renaissance Venetian-Style Glassworking
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This video shows the three parts—bowl, stem, and foot—attached directly from above without the use of mereses, which are more conventionally employed. Learn more about this object in The Techniques of Renaissance Venetian-Style Glassworking by William Gudenrath Between about 1500 and 1725, Venice

Openwork Goblet | Techniques of Renaissance Venetian-Style Glassworking
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In this video, first the bowl or cup is blown of colorless glass. Next, a series of solid and hollow elements are stacked, interrupted by three straps that create an open-work structure. Tiny raspberry prunts are added, and then a blown foot is attached. Finally, the rim is created while the vessel

Beaker | Techniques of Renaissance Venetian-Style Glassworking
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This video shows first the two types of required canes being made and arranged in a pattern on a ceramic plate. After the canes are fused together, a thick, cylindrical bubble of glass is rolled over the canes so that they become attached. After reheating, glassblowing is used to make the beaker.

Winged Glass | Techniques of Renaissance Venetian-Style Glassworking
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A partly hollow combination merese/avolio construction is added to the tip of a bubble of glass that eventually becomes the bowl (or cup). A complex, multi-part stem and foot are then attached. The vessel is completed while it is held by a pontil. Learn more about this object in The Techniques of

Stangenglas | Techniques of Renaissance Venetian-Style Glassworking
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This video shows retortoli canes being made and cut, then placed on a ceramic place-holding plate and then pre-heated. Next, a thick cylindrical bubble of glass is rolled over the canes, thus embedding them in its surface. Glassblowing is then used to make the vessel and its foot. Learn more about

Swiss Goblet | Techniques of Renaissance Venetian-Style Glassworking
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This video shows white canes of a small diameter being made. Next, the pre-heated canes are rolled up on the exterior of a thick-walled, cylindrical bubble of glass. This is then formed into a preliminary stem and foot construction, to be used later in the manufacturing process. The bowl is blown

Ferdinand II Beaker | Techniques of Renaissance Venetian-Style Glassworking
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This video shows the making of the vessel body and a small blown-foot with a folded edge. At the end of the glassblowing processes, a fin-mold is used to transform the upper-half of the vessel and the rim from a round to hexagonal shape. Learn more about this object in The Techniques of Renaissance

Bill Gudenrath Live-streamed Studio Demonstration (January 2019)
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An expert on Venetian glass, William Gudenrath taught students in his January 2019 class how to create well-formed and thinly-blown vessel bodies, excellent necks, delicate mereses, and blown feet and stems. In this demo from January 16, Gudenrath shares his knowledge of reticello —a type of blown

Ein Gedi Bottle
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This video shows the making of the Ein Gedi bottle, which is dated to the mid-first century B.C. It is now in The Israel Museum, Jerusalem. Learn more in The Techniques of Renaissance Venetian Glassworking by William Gudenrath. The Venetian glass industry enjoyed a golden age during the Renaissance

Color-Band Bottle
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The small bottle shown in this video is made with bands of color. Learn more in The Techniques of Renaissance Venetian Glassworking by William Gudenrath. The Venetian glass industry enjoyed a golden age during the Renaissance. By the early 1500s, the wonders of Venetian glass were well known

Bill Gudenrath Live-streamed Studio Demonstration (June 20, 2018)
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Watch as Bill Gudenrath demonstrates for his class, "An In-Depth Introduction to Venetian Techniques," at The Studio of The Corning Museum of Glass. See the final objects out of the annealer starting at 1:01:58. William Gudenrath is a glassblower, scholar, lecturer, and teacher. He is an

Goblet made from Three Bubbles
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Three bubbles are attached to one another to create this goblet. The first bubble makes the bowl, the second creates the knop, and the third produces the foot. Learn more about this object in The Techniques of Renaissance Venetian Glassworking by William Gudenrath. The Venetian glass industry

Three-bubble Cup with Pineapple Dip Molding
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The bowl of this three-part goblet is made by using a pineapple dip mold. The object also includes a merese, a knop, and a foot. Learn more about this object in The Techniques of Renaissance Venetian Glassworking by William Gudenrath. The Venetian glass industry enjoyed a golden age during the

Master Class 2: Introduction to Venetian Techniques with William Gudenrath
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William Gudenrath, resident advisor of The Studio, provides instruction in the basics of Venetian glassblowing and creates his own Venetian-inspired glass pieces. The portrait of the artist focuses on his passion for glassblowing, teaching and music. Master Class Series, Vol. II: Introduction to

William Gudenrath- Artist's Choice Tour
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Glass artist William Gudenrath shares his love of one of his favorite pieces in the Corning Museum of Glass, Anthem of Joy by Vera Liskova (79.3.14).

60 Years- The Studio
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The Studio, which opened in 1996, is an internationally renowned teaching facility that offers classes in a variety of glassmaking techniques to students of all ages and skill levels. Artists and students come from all over the world to teach, to learn, and to create their own work in glass. The

Glass Masters at Work: William Gudenrath
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Experience the genius of master glassmaker William Gudenrath in the latest installment of the Glass Masters at Work series. Like the others in the series, this film was shot at The Studio of The Corning Museum of Glass by award-winning documentary filmmaker Robin Lehman.

Heat Sensitive Glass
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Glass that gradually shades from one color to another has ingredients such as uranium and gold, which are sensitive to heat. When part of the object is reheated, it "strikes" or changes color. Heat-sensitive glass became very popular in the late 19th century. Many companies used heat

Studio Demonstrations: William Gudenrath
Video

Watch William Gudenrath demonstrate for his Refining and Solidifying Your Techniques class at The Studio. Gudenrath's class focuses on advanced Venetian techniques: well-formed and thinly blown vessel bodies, excellent necks, delicate mereses, and blown feet and stems.

Instructor Highlight at The Studio: William Gudenrath
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William Gudenrath is a glassblower, scholar, lecturer, and teacher. He is an authority on historical hot glassworking techniques from ancient Egypt through  through the Renaissance, and has presented lectures and demonstrations throughout the world. As resident adviser for The Studio, Bill ensures

Studio Demonstration: William Gudenrath
Video

Watch as William Gudenrath demonstrates for his class, Refining and Solidifying Your Technique, in which students who have previously studied with Gudenrath are invited to review and refresh their Venetian techniques: well-formed and thinly blown vessel bodies, excellent necks, delicate mereses,

Narrated Chevron Beadmaking Demonstration
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This 6-minute version of a Chevron bead demonstration, narrated by William Gudenrath, shows the various stages of creating a Chevron bead, from the hot, blown glass component, through the lapidary steps required to finish.

Live-streamed Studio Demonstration: William Gudenrath
Video

Watch as William Gudenrath demonstrates for his class, An In-depth Introduction to Venetian Techniques, which focuses on creating a firm foundation in the basic movements of Venetian-style glassblowing.

Live-streamed Studio Demonstration: William Gudenrath (August 13, 2014)
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William Gudenrath demonstrates a second time this summer, again showing an introduction to Venetian-style glassblowing.  From 13:45 to 22:14 take a behind-the-scenes look at what happens the morning of our live-streamed demos. Meet the AV team who sets up and runs the show, and learn more about the

Behind the Glass: Invention in Early Glassblowing- The Road to Ennion with Bill Gudenrath
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The technique of glassblowing appeared in Jerusalem in the middle of the first century B.C., and over the course of the next century, this discovery led to additional extraordinary technological developments.  Shortly after the discovery of glassblowing, the glassmaker Ennion established the

Live-Streamed Studio Demonstration: William Gudenrath (July 8, 2015)
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See photos of the finished pieces from this demo. Watch as Bill Gudenrath demonstrates for his class, An In-Depth Introduction to Venetian Techniques, which provides students with a firm foundation in the basic movements of Venetian-style glassblowing. William Gudenrath is a glassblower, scholar,

Bill Gudenrath Live-streamed Studio Demonstration
Video

Watch as Bill Gudenrath demonstrates for his class, An In-Depth Introduction to Venetian Techniques, at The Studio of The Corning Museum of Glass. See the final objects out of the annealer starting at 1:10:23. Gudenrath is a glassblower, scholar, lecturer, and teacher. He is an authority on