Fracture-streamer Glass

Tiffany glass refers to the many and varied types of glass developed and produced from 1878 to 1929–1930 at the Tiffany Studios in New York City, by Louis Comfort Tiffany and a team of other designers, including Clara Driscoll, Agnes F. Northrop,McGreevy, Nora,
Stunning Tiffany Stained Glass Debuts After 100 Years of Obscurity
', Smithsonian Magazine, May 28, 2021 and Frederick Wilson.

In 1865, Tiffany traveled to Europe, and in London he visited the Victoria and Albert Museum, whose extensive collection of Roman and Syrian glass made a deep impression on him. He admired the coloration of medieval glass and was convinced that the quality of contemporary glass could be improved upon because the production of art glass in America during this time was not close to what Europeans were creating. In his own words, the "Rich tones are due in part to the use of pot metal full of impurities, and in part to the uneven thickness of the glass, but still more because the glass maker of that day abstained from the use of paint".

Tiffany was an interior designer, and in 1878 his interest turned toward the creation of stained glass, when he opened his own studio and glass foundry because he was unable to find the types of glass that he desired in interior decoration. His inventiveness both as a designer of windows and as a producer of the material with which to create them was to become renowned. Tiffany wanted the glass itself to transmit texture and rich colors and he developed a type of glass he called "Favrile".

Tiffany Studios

The favrile, or "fabrile" glass was manufactured at the Tiffany factory located at 96–18 43rd Avenue in the Corona section of Queens from 1901 to 1932. Today, the ''Louis Tiffany School'' or New York City'sbr>P.S. (public school) 110Q
is now built on the old site.

Closing

The closing of the factory has been a matter of some controversy. Tiffany's glass fell out of favor in the 1910s, and by the 1920s a foundry had been installed for a separate bronze company. Tiffany's leadership and talent, as well as his father's money and old firm allowed Tiffany to relaunch Tiffany studios as a marketing strategy in order for his business to thrive. In 1932, Tiffany Studios filed for bankruptcy. Ownership of the complex passed back to the original owners of the factory — the Roman Bronze Works — which had served as a subcontractor to Tiffany for many years." John Polachek, founder of the General Bronze Corporation —who had worked at the Tiffany Studios earlier— purchased the Roman Bronze Works (the old Tiffany Studios). General Bronze then became the largest bronze fabricator in New York City formed through the merger of his own companies and Tiffany's Corona factory. Louis Tiffany subsequently died in 1933.

Types

Opalescent glass

The term "opalescent glass" is commonly used to describe glass where more than one color is present, being fused during the manufacture, as against ''flashed'' glass in which two colors may be laminated, or silver stained glass where a solution of silver nitrate is superficially applied, turning red glass to orange and blue glass to green. Some opalescent glass was used by several stained glass studios in England from the 1860s and 1870s onwards, notably Heaton, Butler and Bayne. Its use became increasingly common. Opalescent glass is the basis for the range of glasses created by Tiffany.The use of the term ''opalescent'' is actually a misnomer. Opalescence actually refers to the quality of changing color under transmitted light, rather than the quality of having several colors present. A rare example of true opalescent glass is the Roman Lycurgus cup in the British Museum

In addition opalescent glass comes in three main types. The first type is exemplified by blue-tinged semi-opaque or clear glass with milky opalescence in the center, seen in creations by Lalique, Sabino, and Jobling's. This effect is achieved through slower cooling, causing crystallization. The glass glows golden when backlit and a beautiful blue when front-lit. Many French companies in the 1920s and 1930s, such as Lalique and Sabino, produced opalescent art deco pieces. The second type features a milky white edge or raised pattern on colored pressed glass. Reheating sections during the cooling process turns them white, creating a decorative effect. This method was employed by various companies, including Barolac in Bohemia, Joblings in England, and Val St Lambert in Belgium. The third type involves hand-blown glass with two layers, containing heat-reactive components like bone ash. The glass is blown into a mold with a raised pattern, and reheating turns the heat-sensitive glass milky white, creating a contrasting silhouette against the clear background (for more informatio

.

Favrile glass

Tiffany patented Favrile glass in 1892. Favrile glass often has a distinctive characteristic that is common in some glass from Classical antiquity: it possesses a superficial iridescence. This iridescence causes the surface to shimmer, but also causes a degree of opacity. This iridescent effect of the glass was obtained by mixing different colors of glass together while hot.

Streamer glass

Streamer glass refers to a sheet of glass with a pattern of glass strings affixed to its surface. Tiffany made use of such textured glass to represent, for example, twigs, branches and grass. Streamers are prepared from very hot molten glass, gathered at the end of a punty (pontil) that is rapidly swung back and forth and stretched into long, thin strings that rapidly cool and harden. These hand-stretched streamers are pressed on the molten surface of sheet glass during the rolling process, and become permanently fused.

Fracture glass

Fracture glass refers to a sheet of glass with a pattern of irregularly shaped, thin glass wafers affixed to its surface. Tiffany made use of such textured glass to represent, for example, foliage seen from a distance.
The irregular glass wafers, called ''fractures'', are prepared from very hot, colored molten glass, gathered at the end of a blowpipe. A large bubble is forcefully blown until the walls of the bubble rapidly stretch, cool and harden. The resulting glass bubble has paper-thin walls and is immediately shattered into shards. These hand blown shards are pressed on the surface of the molten glass sheet during the rolling process, to which they become permanently fused.

Fracture-streamer glass

Fracture-streamer glass refers to a sheet of glass with a pattern of glass strings, and irregularly shaped, thin glass wafers, affixed to its surface. Tiffany made use of such textured glass to represent, for example, twigs, branches and grass, and distant foliage. The process is as above except that both streamers and fractures are applied to sheet glass during the rolling process.

Ring mottle glass

Ring mottle glass refers to sheet glass with a pronounced mottle created by localized, heat-treated opacification and crystal-growth dynamics. Ring mottle glass was invented by Tiffany in the early 20th century. Tiffany's distinctive style exploited glass containing a variety of motifs such as those found in ring mottle glass, and he relied minimally on painted details.

When Tiffany Studio closed in 1929–1930, the secret formula for making ring mottle glass was forgotten and lost. Ring mottle glass was re-discovered in the late sixties by Eric Lovell of Uroboros Glass. Traditionally used for organic details on leaves and other natural elements, ring mottles also find a place in contemporary work when abstract patterns are desired.

Ripple glass

Ripple glass refers to textured glass with marked surface waves. Tiffany made use of such textured glass to represent, for example, water or leaf veins. The texture is created during the glass sheet-forming process. A sheet is formed from molten glass with a roller that spins on itself while travelling forward. Normally the roller spins at the same speed as its own forward motion, much like a steam roller flattening tarmac, and the resulting sheet has a smooth surface. In the manufacture of rippled glass, the roller spins faster than its own forward motion. The rippled effect is retained as the glass cools.

Drapery glass

Drapery glass refers to a sheet of heavily folded glass that suggests fabric folds. Tiffany made abundant use of drapery glass in ecclesiastic

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