A Silver Alternative

 

QUESTION: As I was browsing a weekly flea market, I came upon a curious silver vase—at least I thought it was silver. But when I picked it up, it felt like glass and was much lighter than silver. The dealer said it was Mercury glass. I never heard of such a thing. Can you tell me more about it?

ANSWER: As the Industrial Revolution gained momentum, the growing middle class wanted inexpensive alternatives to the silver objects owned by the wealthy. One of those alternatives was Mercury glass, first made as an inexpensive silver substitute. Soon it evolved into an art form of its own.

First produced in the late 18th century, Mercury glass was a handblown, double-walled glass with an interior coating of silver-colored metal compounds. It took many forms, including candlesticks, compotes, candy dishes, plates, goblets, wig stands, curtain tiebacks, and doorknobs. Some critics condemned it for looking too much like mirrored glass and too little like silver, which was what people liked about it.

Produced originally from around 1840 until around 1930 in Bohemia, now the Czech Republic, and Germany, it spread to England in 1849 when Edward Varnish and Frederick Hale Thomson patented the technique for silvering glass vessels, and continued to be made there until 1855.

Mercury glass, also known as silvered glass, contains neither mercury nor silver. It's actually clear glass, mold-blown into double-walled shapes and coated on the inside with a silvering solution containing silver nitrate and grape sugar, heated, then closed. Sealing methods included metal discs covered with a glass round in England, or a cork inserted into the unpolished pontil scar on the bottom in America. In the beginning a few Bohemian makers tried to line their pieces with a mercury solution, but they stopped using it due to expense and toxicity. However, this is where the name originated.

Companies in the United States, including the Boston and Sandwich Glass Company, New England Glass Company Union Glass Company, and the Boston Silver Glass Company, made silvered glass from about 1852 to 1880. The New England Glass Company displayed a variety of silvered glass articles, including copper wheel engraved goblets, vases and other tableware at the 1853 New Crystal Palace Exhibition.

Bohemian Mercury glassmakers decorated their pieces with a variety of techniques including painting, enameling, etching, and surface engraving. Antique historians believe it to be the first true "art glass"---glass made for display and for its artistic value rather than for everyday use.

The peak of Mercury glass’ popularity came in the mid-19th century. Back then, high-quality European and American-made pieces were lightweight, had graceful forms, and came decorated with acid-etched fruit or floral motifs, cut glass designs, and sometimes paint. Young girls, working on assembly lines, painted vases in particular with their own designs of swans, daisies, or leaves. Makers intended the details on their pieces to be equal to the finest decoration on other forms of glass and china.

After briefly falling out of favor, Mercury glass reappeared around 1900 in the form of Christmas ornaments and gazing balls, as well as blown fruits and flowers. Today, most serious collectors concentrate on antique forms, like curtain pins, salt cellars, or pedestal-footed silvered vases.

To read more articles on antiques, please visit the Antiques Articles section of my Web site.  And to stay up to the minute on antiques and collectibles, please join the over 30,000 readers by following my free online magazine, #TheAntiquesAlmanac. Learn more about "The Art Deco World" in the 2024 Spring Edition, online now. And to read daily posts about unique objects from the past and their histories, like the #Antiques and More Collection on Facebook.

Brightening the World with Loetz Glass

 

QUESTION: I like to collect art glass. Over the years, I added many pieces to my collection. Recently, I discovered a beautiful vase at an antique show. The dealer said it was made by Loetz of Czechoslovakia. From its design and form—it’s a classic green vase with large orange dots—it looks to be Art Nouveau, but I’m really not sure when the company produced it. What can you tell me about Loetz Glass? I’d like to add more pieces to my collection. Did they only make one type of art glass or did they diversify?

ANSWER: Loetz produced your vase around 1911, so it definitely falls within the time of Art Nouveau. Loetz was the premier Bohemian art glass manufacturer during the Art Nouveau period from about 1890 to 1920. 

It’s commonly believed that Johann Loetz founded his glassworks in 1840. In fact, Johann Eisner, another glassmaker, opened a glassworks four years earlier in Klostermühle, a town in southern Bohemia, in what’s now the Czech Republic. His heirs sold the glassworks to Martin Schmid in 1849, and two years later Schmid sold it to Frank Gerstner, attorney-at-law, and his wife Susanne, who was the widow (Witwe in German) of glassmaker Johann Loetz. 

Gerstner transferred sole ownership to his wife shortly before his death in 1855, after which she successfully expanded the company for 20 years, manufacturing mainly crystal, overlay and painted glass.

In 1879, Susanne transferred the company, now called Johann Loetz Witwe, to Maximilian von Spaun, the son of her daughter Karoline. One year later, von Spaun hired Eduard Prochaska and the two of them modernized the factory and introduced new, patented techniques and processes.

Before Loetz became known for its Phänomen and "oil spot" pieces, it had pioneered a surface technique called Marmoriertes, which produced a marbled red, pink, or green surface on objects such as vases and bowls which imitated semi-precious stones, such as malachite, onyx, and red chalcedony. 

Phänomen featured rippled or featherlike designs on the object’s surface. Loetz artisans achieved this unique effect by wrapping hot glass threads around an equally hot molten base. They then pulled threads on the piece’s surface to make waves and other designs while the materials were still malleable. They combined this with techniques pioneered by Louis Comfort Tiffany in the United States.

Another late-1880s forerunner of its most prized pieces was its Octopus line, whose white curlicue lines on a darker, mottled surface resembled the tentacles of octopi.

In 1889, the company took first prize at the Paris Exhibition for its classic vase forms, some of which were hand-worked and deformed into swirling, organic-looking shapes like seashells, flowers, and tree trunks. Decorative vases, cups, and pitchers were other popular forms in the Loetz lineup, and many of the pieces glowed thanks to their iridescent sheen from the firing and reduction techniques.

By 1904 sales began to fall off as the interest in Phänomen glass had begun to decline. So the company intensified its collaboration with Viennese designers to compensate for a lack of its own innovation. In 1909, Loetz appointed Adolf Beckert, a specialist in etched decoration, as its new artistic director. In the same year, von Spaun transferred management of the glassworks to his son, Maximilian Robert. But financial problems forced the company into bankruptcy in 1911.

Another series from the turn-of-the-century was known as Streifen und Flecken, or stripes and spots, whose cheerful shapes and colors were as friendly as a polka-dot skirt from the 1950s. Asträa pieces also had oil spots, although the base color tended toward the metallic. Works in the Diaspora series were almost all dots, whether it was a simple vase or a one shaped like a chambered nautilus.

The use of patterns was also a hallmark of Loetz art glass. The Spiraloptisch were a blizzard of spirals, while the more formal looking pieces in the Décor series were painted and etched with leaf and flower shapes to create works with an almost Asian sensibility.

After 1905, when interest in the florals waned, Loetz artisans pushed their glass surface treatments further than ever while relying on shapes that the company had used for decades. For example, the roiling surfaces of the Titania pieces pre-date Abstract Expressionism by 30 years. Loetz’s Perlglas pieces were translucent, giving more weight to the forms as sculpture rather than distracting the viewer with dazzling surfaces.

But without a doubt, the most memorable Loetz art glass from the end of the Art Nouveau era was its Tango line. Unlike the work that had preceded it, which was all about dense color combinations and tricky surface treatments, these two-toned pieces typically featured single colors on mostly unadorned surfaces, with contrasting lip wraps or handles.

The last significant period for Loetz occurred between the wars. In the beginning of the 1920s, Loetz revived late 19th-century cameo glass, which had been pioneered by Émile Gallé and others. Compared to the work that had come before it, these Loetz vases, bowls and jugs, with their etched, almost sentimental depictions of flowers and scenics, were traditional and safe.

But by 1939, the company had begun to run out of money, and in 1940 a disastrous fire destroyed the factory. After the war, the East German Government nationalized Loetz Witwe, but in 1947 the lights went out for good.

To read more articles on antiques, please visit the Antiques Articles section of my Web site.  And to stay up to the minute on antiques and collectibles, please join the over 30,000 readers by following my free online magazine, #TheAntiquesAlmanac. Learn more about "The Age of Photography" in the 2023 Fall Edition, online now. And to read daily posts about unique objects from the past and their histories, like the #Antiques and More Collection on Facebook.

The Mysterious Glow of Vaseline Glass

 

QUESTION: My aunt recently died and left me several things, including two beautiful twin yellow-green glass vases. I don’t know much about them but someone said they’re made of Vaseline glass. Does that mean they use Vaseline to make them? Can you tell me more about this beautiful glass?

ANSWER: No, your vases aren’t made of Vaseline. The most common color of this type of glass is pale yellowish-green, which in the 1930s led to the nickname "Vaseline glass" based on its resemblance to the appearance of Vaseline brand petroleum jelly as was formulated and commercially sold at that time. 

The addition of uranium dates back to Roman times. Professor R. T. Gunther of the University of Oxford discovered a piece of glass containing one percent uranium dating to 79 C.E. in an excavation of an imperial Roman villa on Cape Posillipo in the Bay of Naples, Italy in 1912.

Starting in the late Middle Ages, workers extracted pitchblende from the Habsburg silver mines in Joachimsthal, Bohemia. This was then used as a coloring agent in local glassmaking. Austrian druggist Franz Xaver Riedel experimented with pitchblende and obtained a yellow substance later identified as uranium dioxide. He added it to glass and became the first major producer of items made of yellow-green uranium glass, which he named "annagrün" (annagreen), in honor of his daughter Anna Maria. By the middle of the 19th century, this new coloring agent became popular in both Europe and America.

Vaseline glass is also called "uranium glass." This mineral added to glass is what makes it glow bright green under blacklight. The normal color of uranium glass ranges from yellow to green depending on the oxidation state and concentration of the metal ions, although this may be altered by the addition of other elements as glass colorants. That bit of uranium in the glass also makes it slightly radioactive.

With improvements in mass-produced, affordable glass, the popularity of vaseline glass rose. During the second half of the 19th century, interest in the glowing glass peaked. The fashionable glass was appealing both in sunlight and in the evenings. Victorian homes were lit by gaslight, kerosene or candles, which produced soft light-The human eye sees yellow-green most easily since it is in the center of the spectrum of colors, so under flickering light con. lit ions, the Vaseline glass seems to glow.

Large glass companies like Fenton Glass and Mosser Glass made vases, tableware, tooth-pick holders, clocks, whimsies, shoes, hats, parasols, inkwells,. compotes, and more in Vaseline glass..But between 1890 and 1910, the middle class became more interested in pottery and porcelain. With the development of Incandescent lighting, the steady light frequency made Vaseline glass appear plain.

The government confiscated all supplies of uranium during WWII for the Manhattan Project and halted all production of vaseline glass for from approximately 1942 until the ban was lifted in November 1958. From 1959 onward, glass companies began making vaseline glass again. However, because of the expense to obtain uranium dioxide, production was and is still very limited.

To read more articles on antiques, please visit the Antiques Articles section of my Web site.  And to stay up to the minute on antiques and collectibles, please join the over 30,000 readers by following my free online magazine, #TheAntiquesAlmanac. Learn more about "Celebrating an Olde Fashioned Holiday" in the 2020 Holiday Edition, online now. And to read daily posts about unique objects from the past and their histories, like the #Antiques and More Collection on Facebook.

The King of Glass

QUESTION: I have a beautiful green glass cordial set that belonged to my great grandmother. It’s been passed down to me. I just love this set and would like to know more about it. I was told that it was made by the Moser Glass Company in Czechslovakia. What can you tell me about it?

ANSWER: It’s difficult to tell if your cordial set is in fact made by Moser. It’s definitely in its style but other company copied it. Moser was one of the only Bohemian glass companies to sign some of their works. Usually the signature is in gold enamel somewhere on the piece, but many pieces remained unsigned.

Of all the Bohemian glassmakers of the 19th century, Ludwig Moser, known as the “King of Glass,” is probably the most famous. The company was well known for its heavy and intricate gold enameling. But Moser wasn’t the only glass decorator to adorn blanks with this type of decoration. Glassmakers copied each other in an effort to get their share of the market. Like many Bohemian firms, Moser sold blanks to other companies for decoration and decorated blanks bought from other companies, such as  Loetz, Meyr's Neffe and Harrachov, so it can be difficult to tell if Moser indeed made a particular piece.
                   
Ludwig Moser was born in 1833 and began his apprenticeship in the glass business at age 14. From there, he became a skilled engraver. In 1870, he opened a refinery in Karlsbad, Bohemia, today Karlovy Gary in the Czech Republic, and employed other glass cutters and engravers who decorated glass blanks purchased from other companies. The firm's work earned Moser international recognition for his engraved drinking glasses.

By 1880, Moser was making the intricately enameled glass that’s most often associated with him. He designed them for the Oriental market, intending them to resemble the work of Arabian goldsmiths. In 1893, he took over a glassworks factory in Meierhofen bei Karlsbad, employing 400 workers, under the name of Karlsbaderglasindustrie Gesellschaft Ludwig Moser & Söhne and where his sons Gustav and Rudolf also worked. Here he produced shaded transparent engraved glass. Within a short time Moser’s company gained the reputation as the most prestigious producer of crystal in the Austrian-Hungarian Empire.

Because of the excellent quality of his work, Emperor Franz Joseph I appointed Moser as the exclusive supplier of glass to the royal family. He won numerous awards at the World Exhibitions in Paris in 1879, 1889 and 1900, and the World Exhibition in Chicago in 1893.

The firm also introduced pieces with applied glass flowers and fruits. These remained popular through the 1920s and marked Moser's departure from the intricately enameled luxury glass he had made earlier. By 1922, Moser Glass became the largest producer of luxurious drinking and decorative glass in Czechoslovakia. Moser's son, Leo, who had taken over the firm upon the death of his father in 1916, sold the firm in 1938. When the Communists took over Czechoslovakia, the government took over the Moser glass works but continued to use its name.

Moser glassware commands top prices, so collectors need to know their glassware or purchase pieces from reputable dealers to avoid paying top dollar for similar work by a less famous firm. Cups and saucers run about $300 a set, with larger pieces or those with unusual forms hovering around $2,000.

Prices for Moser engraved glass run about the same. Amethyst or green en-graved miniature rose bowls run around $275 to $350. Larger, more detailed pieces command more money. An amethyst intaglio engraved perfume and stopper runs about $650, a covered box about $800, and a tray about $500. Vases run $600 to $1,000 and up, depending on size and design. Green and crystal enameled pieces, which date anywhere from the late 19th to the early 20th centuries sell for under $200.

The Beauty of Christmas Kugels

QUESTION: I came across a heavy white glass ornament with what appears to be some sort of decals on the bulbs. Also each one has a colored stone–almost like birth stones–indented into the ornament. All the tops are a gold finish. I have seen a lot of ornaments but none like these. Any ideas?

ANSWER: It sounds like this person has discovered a kugel, a type of heavy glass Christmas ornament made in Germany from about 1840 until 1914. The word kugel means “ball” in German. The first ones were smooth, heavy glass balls that were too heavy to hang on anything but a stout pine in the yard, so people hung them in their windows.

Louis Greiner-Schlotfeger invented the kugel to compete with the glassblowers of neighboring Bohemia who had perfected blowing glass beads lined with lead mirroring solution with produced a brilliant shine. And though he was able to duplicate the lead mirroring solution, he couldn’t hand blow his kugels thin enough. The result was heavy pieces of glass shaped as balls in a rainbow of colors in sizes ranging from an inch in diameter to over 30 inches.

Originally, the glassblowers hung their kugels with bits of wire. After blowing a glass bubble, they snipped it from the blowing tube which resulted in a small neck with a hole leading to the inside of the kugel. They ground the neck down leaving just a hole and attached a decorative brass cap, held in place with wire arms that spread apart inside the glass sphere. Finally, they attached hanging rings to the caps and hung them with wire hooks.

It wasn’t until 1867, when Greiner-Schlotfeger’s village built a gas works that he had a steady, hot, adjustable flame, enabling him to blow thin-walled glass balls. From that point, it was a simple step to blowing glass into cookie molds shaped like fruits and pine cones. While the glassblowers still called them kugels–more specifically Biedermeierkugeln, referring to the Beidermeier Period in which they were made–they technically weren’t any longer and soon people called them Christmas ornaments.

By 1880, full-sized trees decorated with expensive imported German glass ornaments became all the rage among the wealthy. American retailer, F.W. Woolworth, saw these ornaments on a trip to Germany, but was reluctant to order any for his stores–at least at first. To his amazement, his original order sold out in two days.

For more information on kugels, read my article on antique Christmas ornaments.