Stretched for Beauty

QUESTION: I recently purchased a beautiful plate at an antique show. The dealer said it’s stretched glass, but I don’t see how that’s possible since it’s a round plate. Can you tell me why my plate is called ‘stretched” glass?

ANSWER: Ever since it’s inception, the term stretch(not stretched) has confused people. It appears mistakenly on price tags in antique shops and in online descriptions. Because of the word “stretch,” People imagine a piece from the 1950s or 1960s that has been stretched to make it taller or wider, but stretch glass is entirely different.

Some people believe stretch glass is swung back and forth on a rod to make it stretch outward. Or, they think it looks like a strange type of Carnival or art glass, so it must be that. Neither is correct. Most of the time, people's first reaction is how beautiful the glass is, but they don't know anything about it.

On eBay there are over 28,000 listing for stretch glass and most are far from it. To collectors, stretch glass is iridescent stretch glass. It differentiates the glass from the common mistake of being considered swung glass. Forty to 50 percent of people think swung vases are stretch glass.

Created by several American glass factories from 1916 to the early 1930s, iridescent stretch glass is a pressed or blown molded glass. It’s shaped and formed—pressed or blown into molds—reheated and then sprayed with a metallic salt or dope, a procedure called  doping, while the piece is still hot. The glass blower then reheats the piece and this is when the stretch marks occur. The glass expands faster where the dope blower applied the dope, which causes a crackled, web-like appearance on the glass. Further shaping emphasizes these stretch marks. Some blowers often shape or "work" the glass a lot which emphasizes the stretch marks in the iridescence while others don’t work their pieces as much, resulting in finer stretch marks and are only satiny.

Collectors consider true carnival, stretch, and art glass with a shiny iridescence doped ware. The difference between them is when the glass blower applies the metallic salts to the glass. While glass blowers shape and form Carnival glass first and then dope it  to create a shimmering to slightly satin iridescent surface, they spray stretch glass  while the glass is molten hot, then reheat and reshape it to make the stretch marks. Another difference is that Carnival glass has a distinctive pattern in the glass mold, such as grapes, butterflies, or geometrical patterns on the inside, outside or on both sides of the glass. Stretch glass has little or no pattern and is very plain.

Confusion seems to set in when people are searching for stretch glass, especially since art glass also has both iridescence and stretch effects. Although art glass is from the same period as stretch glass, the chemicals in the glass make the difference. Additional stretch effects may be from doping the pieces and further shaping. Art glass is also much thinner and more delicate than stretch glass.

People also confuse freeform art glass, produced from the 1950s to the present and commonly posted on eBay, with stretch glass.

Companies that produced stretch glass included Central Glass Works of Wheeling, West Virginia, Diamond Glass-Ware Company of Indiana, Pennsylvania, Jeanette Glass Company of Jeanette, Pennsylvania, Vineland Flint of Vineland, New Jersy, and United States Glass Company of Pittsburgh, Pennsylvania.

The true difference between the stretch glass that different manufacturers produced was the unique colors. Tangerine is a popular color among collectors, along with red and ruby, which each cost more because of their popularity. Wisteria, a purple-colored glass is also popular. Opaque colors of stretch iridescent glass are rare and can be pricey.

The most common stretch glass color that can be found is celeste blue, as well as the topaz and pink. Blue was the  dominant color though, along with topaz, both of which were good selling items when they first appeared. Topaz was a good seller in the 1910s and 1920s because not everyone had electricity. This color catches the light and reflects it very well. There’s also a lot of Florentine green stretch glass out there as well and crystal stretch glass, which has a frosty white iridescence. With so many stretch colors out there including aquamarine, blue smoke, coral, custard, pink and white luster, beginning collectors are sure to find a favorite of their own.

Iridescent stretch glass not only comes in a variety of colors, but also a range of prices. Pieces that once sold for 25 cents to $1 can now be picked for $25 to $50, and even $10 to $15 for more common pieces.

High-end pieces, such as a Fenton No. 604 punch on a red stand, can sell into the thousands. One sold on eBay for $4,200. While the price may seem high, anyone can acquire a decent collection of stretch glass if they buy pieces in the $25 to $100 range.

Step Right Up and Try Your Luck

QUESTION: I just inherited my mother’s collection of carnival glass. I always admired it while growing up, but she never really told me much about it. Now that I have it, I’d like to continue collecting, but I have no idea where to begin. Can you give me some background on carnival glass and also some tips on growing and maintaining my mother’s collection?

ANSWER: Carnival Glass is pressed glass—glass that has been formed by being pressed into a mold while in a hot molten form—that has had an iridescent coating applied. As it cools, it takes on the shape and detail of the mold. Once removed from the mold, and while still somewhat hot, the glassmaker sprays it with metallic salts in liquid form which gives it an "oil-on-water" multicolor appearance. He then refires the piece.

The Fenton Glass of Williamston, West Virginia, first produced carnival glass, which it called "iridescent ware," in 1907. The company called its first line Iridill and labeled it "Venetian Art."  They wanted to mass-produce a product that could compete with the expensive, iridescent art glass made by Tiffany and Steuben. Though half a dozen companies, including Northwood, Imperial, Millersburg, Westmoreland, Dugan, and Cambridge, originally made it, Fenton did so longer than any of the others.

Competition became so fierce between makers that new patterns appeared regularly, so each company ended up making a wide range of patterns of most types adding up to a panoply of choice.

Its eye-catching multicolor shimmer seems to change colors when viewed at different angles. Over the years, carnival glass has been dubbed "Taffeta," "Cinderella," and "Poor Man's Tiffany," as it gave the average housewife the ability to adorn her home with fancy vases and decorative bowls a prices she could afford.
   
But this new type of glass didn’t catch on with the public the way Fenton had hoped, especially since they tried pricing it higher than their regular pieces without the carnival finish. Unfortunately, most consumers didn't see carnival glass as quality glass and refused to pay higher prices for it. Other glass manufacturers soon began making carnival glass using the same iridization techniques. This overloaded the market and soon prices plummeted. To get rid of their excess inventory, carnival glass makers at first began giving it away to carnival owners to use as prizes, but later sold sample pieces to them in hopes that winners could then purchase additional items in the same or a similar pattern. Together all the manufacturers produced over 2,000 different patterns.

This new market for carnival glass was a boon for Fenton, which produced iridescent ware in 150 patterns up until the late 1920s. Carnival glass sold for pennies at five-and-dime stores, and businesses could buy it wholesale at minimal cost. This allowed movie theaters and grocery stores to give it away as premiums. For example, Imperial Glass struck lucrative deals with companies like Woolsworth's and Quaker Oats.

Fenton's earliest patterns included Waterlily and Cattails, Vintage, Butterfly and Berries, Peacock Tail, Ribbon Tie, Wreath of Roses, Thistle, and Diamond and Rib. Among Northwood's first glass patterns were Waterlily and Cattails, Cherry and Cable, and Valentine, but Grape and Cable became their most popular. Millersburg collectors look for Hobstar and Feather, Blackberry Wreath, and Rays and Ribbons.

Collectors call the most popular color of carnival glass “marigold,” although the companies, themselves, didn’t call it that. Marigold has a clear glass base and is the most easily recognizable carnival color. The final surface colors of marigold are mostly a bright orange-gold turning perhaps to copper with small areas showing rainbow or 'oil-slick' highlights. The highlights appear mostly on ridges in the pattern and vary in strength according to the light.

Carnival glass is highly collectible. Prices vary widely, with some pieces worth very little, while other, rare items command thousands of dollars.

However, identifying carnival glass can be a challenge. It involves matching patterns, colors, sheen, edges, and thickness from information contained in old manufacturer's trade catalogs, other known examples, or other reference material. Many manufacturers didn’t include a maker's mark on their product, and some did for only part of the time they produced the glass. Since many manufacturers produced close copies of their rivals' popular patterns, carnival glass identification can be difficult even for an expert.

By 1925, carnival glass started to fall out of favor with Americans, and many U.S. glass companies quit producing it during the Great Depression.

Telecommunications Relics

QUESTION: I recently purchased a box of glass insulators, like the kind used on telephone and electric poles. A couple of little white specks in the glass. I bought them because of their beautiful colors, but do these things have any value as a collectible? And just how were they used?

ANSWER: There’s nothing like the beauty of colored glass, especially when placed in a window where the sun can shine through it. Many people collect these glass electrical insulators for just that reason. But some, especially retired linemen, collect them because they’re a part of the history of telecommunications.

Ezra Cornell invented the insulator in 1844 as a means of protecting electrical wires front the elements and reducing the loss of current from the wire to the ground. As technology developed, power and telephone companies needed more insulators.

The earliest insulators had unthreaded pin holes. Because linemen simply pressed them onto a wooden pin, extending upwards from the crossarm of an electric pole, they didn't stay on very well since the wires contracted and expanded in the heat and cold. When Louis A. Cauvet improved the insulator by patenting the threaded pin hole type in 1865, he sold his invention to Brookfield Glass Company of  Brooklyn, which remained a major producer of insulators until 1922.

Though threaded pin holes helped insulators stay put, moisture still presented a problem since wet glass served as a conductor. In 1893, the Hemingray Company, another major manufacturer, obtained a patent for insulator "drip points." These bumps, which line the outside bottom rim of the insulator skirt,  helped prevent shorts by causing moisture to drip off. The earliest points were sharp but these were easily broken, leading to the manufacture of more rounded ones. Hemingray must have discovered that these really didn't work, since they eliminated them from later models. However, other companies continued to make insulators with drip points.

Porcelain insulators began to replace glass examples in the early 20th century, particularly on high voltage lines since glass insulators only worked on lines handling up to 60,000 volts.. By the late 1940s, only a few producers of glass insulators remained, by 1969, Kerr Manufacturing was the only company still making them.

Manufacturers produced glass Insulators in a variety of colors and types of glass. They used remnants of window or bottle glass for earlier ones. Most companies made insulators only as a sideline,  pressing them out of whatever kind of glass happened to be available. Because of this, objects like nails, screws, coins, and bits of furnace brick would get mixed into the glass. Collectors call the little white furnace brick bits rocks. Some makers, like Hemingray, would cull out these blemished pieces, but others like Brookfield Company would just sell the blemished pieces along with the good ones.

The most common insulator colors are clear and light bluish-green or aqua. Other colors include sun-colored amethyst, green,  milk glass, royal blue, cobalt, amber and Carnival glass. The only color not made in glass is red, because red requires gold as a colorant. The most popular colors are royal blue and cobalt, with amethyst a close second. Insulator makers originally produced purple ones, ranging from  light lavender to deep amethyst, from clear glass. Manganese, used to clarify the glass, turned the glass purple after being exposed to the sun’s ultraviolet rays. After the start of World War I, manganese became scarce since it was needed for arms production. Manufacturers switched to selinium, which the sun turned to the color of wheat.

Common clear and aqua insulators sell for as little as a dollar each. But prices climb steadily for rare ones such as the Buzby or the Twin Pin. Aqua ones made by the Jeffrey Manufacturing Company can sell for as much as $125 each while a threadless Canadian insulator, also known as a snow cone, can sell for about $2,000.

For more information on glass insulators, go to www.insulators.info/.