identifying slag glass lamps

A mark for Sowerby, Davidson, or Greeners will indicate a vintage U.K. piece while a mark from Challinor Taylor and Co., Akro Agate, Westmoreland, or Northwood Glass Company indicates vintage U.S. glass. To test the texture, run your fingers over the surface of the glass. You can tell the age/authenticity of stained glass by looking at the glass that's used. She added custard glass to the company's color line in 1969 and iridescent (carnival) in 1972. 210.180.118.189 Vintage slag glass is most commonly found in brown or purple colors with white streaks, but you can also find plenty of green and blue as well. The molten glass is placed into forms and then pressed to get the right shape and emboss the surface with a pattern. New York Art Deco Nude Dancer Spelter. True slag glass was originally produced in England during the last quarter of the 19th century when, simply put, it is believed slag from iron-smelting was added to molten glass to achieve a marbling effect in a variety of colors. There are several things to keep in mind when looking to identify whether something is slag glass or not. Identifying Silhouette Slag Glass Lamp | All About Antiques If it feels bumpy or uneven, its likely slag glass. Slag glass gets its name from slag. How To Identify Tiffany Lamp - How to Tell Real From Fake This list is limited to only a few results.Many more items are available to our members through our Antique Slag Glass Lamps | Collectors Weekly The smooth, uneven swirls enveloping the glassware give slag glass an unmistakably look, with no two ever being quite the same. By clicking Accept, you agree to our website's cookie use as described in our Cookie Policy. Prices go up significantly if a light is signed by a prominent manufacturer like Tiffany Studios or, to a lesser extent, Bradley & Hubbard. Golden glass pieces should have a translucent, amber sheen to them in order to be authentic. Designers would create intricate stained glass style patterns and scenes within lampshades. Another early slag glass was the purple malachite glass by Sowerby, which was sold in the United States under the name "blackberries and cream." In addition, slag glass panels were used in lamps, jewelry boxes, and other collectibles. It has distinctive a distinctive knob pattern and comes in a variety of colors. Fenton Art Glass Identification and Value Guide - The Spruce Crafts The key to determining if a piece of glass is true slag or just a handsome example of pressed glass is to look for glass that is obviously and richly marbled rather than simply colored or streaked. One of the most common alternate names for slag glass is marble glass, for obvious reasons. This is the most obvious giveaway when trying to spot slag glass. This guide will explain how slag glass was made, when it was popular, and what its worth. LAMP SHADE - Leaded slag glass lamp shade, TABLE LAMP - A four panel, dark green slag. Most slag glass replacement panels are completed the same week. Manufacturers used the glass in molds to make bowls, compotes, vases, plant cache pots, and more. The older it is, the higher in cost. Lot 167 : Roycroft/Dard Hunter Extremely Rare Table Lamp, Rago Arts and Auction Center , Lambertville, NJ Est: $40,000-$50,000 Estimate $400/600 Sold with Premium 258.30 Closed October 27, 2022 171. Arts and Crafts Limbert Style Slag Glass Lamp Most companies have halted the production of slag glass items altogether. Fenton, Mosser, Boyd Glass, and Summit are some of the common, modern, U.S. manufacturers of slag glass. 4,089. CO. SLAG GLASS LAMP Base marked M.L. However, the popularity waned at times. Slag glass lamp repair By Len Daley. Some slag glass may also have opaque white sections, often in the form of streaks or patches. Large Signed Rousseau Art Nouveau Figural Lamp w/ Slag Glass Petal Shade. Category 20th Century American Arts and Crafts Slag Glass Table Lamps This is the most difficult distinction to make if youre not a professional. Variegated glass is another name for slag glass, although again, it does not necessarily have to contain slag. Sold with variegated glass having a floral form slag glass shade, above the spelter metal figural standard having a ve having a floral form slag glass shade, above the spelter metal figural standard FIGURAL TABLE LAMP DEPICTING A METAL SMITH IN HIS SHOP FORGING A SCIMITAR BLADE UNDER A HAOrientalist Austrian cold painted spelter figural table lamp depicting a metal Table Lam Table Lamp, early 20th c., the cranberry font on four figural columnar supports to a plinth on a highly figured black marble base on paw feet, on a highly figured Lamp NEW YORK, CIRCA 1920 An American Art Deco patinated spelter figural lamp. Slag glass has something that cannot be found in imperial glass, uranium glass, milk glass, depression glass, carnival glass, or any other type of vintage collectors glassware. This roughness is caused by the recycled materials that make up slag glass, making it different from smooth stained or flashed glass. Slag Glass Lamps - Ideas on Foter The marbling was traditionally produced using slag from iron smelting. 8 Tips for Identifying an Antique Lamp The marbling should be a creamy white color that is evenly mixed into the base color. Look out for its bases and edges 4. If you're a collector of antique lighting, you've likely come across slag glass lamps. These three manufacturers are very well known in the United Kingdom. This is due to the rarity of the color. In addition to technically necessary cookies, this website uses the web analytics software Matomo. Glass Collectible Antique Lamps, Glass Tobacco Pipe, Coca-Cola Glasses; Additional site . Slag Glass prices range from 50 dollars to 1500 dollars. 1930s Traditional Slag Glass Lamp | Chairish Challinor created slag glass slightly differently than the original process which uses true slag. Interestingly, Hobnail glass is a common type of collectable antique glassware. A glass decoration plant opened in early 1968. France, Late 19th Century. Set of four antique embossed brass hanging lamp socket covers, 3 3/4" in diameter overall. American Gilt Spelter Figural Putto Lamp, Pair of Louis XVI Style Patinated Spelter, 19C. Your IP address cannot be used to identify you. When looking to purchase real slag glass, look for the marks of the manufacturer. Answer: The opaque bent panels of pressed glass with the creamy, golden swirls in your lamp are typically referred to as slag glass. Slag glass of other colors is unlikely to be an antique. eBay (258) Magazine. Handel Lamp Authentication Guide | Identify Handel Lamps | Handel Lamps Avon calling. I grew up going to antique stores and markets with my mom and grandmother. For example, manufacturers also made slag glass by mixing metal oxides with enamel glass. Slag glass has a rich history that makes it extremely valuable to collectors. Hopefully, these tips will help make your search for slag glass a successful and enjoyable experience. How I can identify bent slag glass lamp issues Slag glass replacement panels are made to order. Slag glass is a man-made opaque base glass with marbelized swirls in a different color. Most antique slag items are brown, blue, green, or purple. Have you ever wondered what someone meant by slag glass? You'll find slag glass in blues, browns, and greens as well, though these colors are rarer than the brown/white/cream and purple formulations. I'm Stacy Jones and I love antiques! Though it's easily mistaken for other glass products produced around the same time period, such as stained glass, slag glass has its own unique look and slag glass items can fetch a wide range of prices. Starting in the late 1800s and through the mid-1900s, both England and U.S. manufacturers were creating slag glass both with and with the use of iron slag. Some of these names can be used synonymously, but some of them have slightly different meanings that a serious collector should be aware of. They moved across the Ohio River to Williamstown, West Virginia, and built a . Find Fenton markings 3. The light shining through the marbled color creates a really unique effect. Related Posts: Plated Amberina - Rare, Colorful Art Glass Plated amberina glass, with color that graduates from amber to; Glass Paperweights You cannot fix a cracked snow dome paperweight. The original slag glass is brown with creamy streaks, a similar pattern to how your cup of coffee looks when you first pour in milk or creamer. But in case you are looking for a list of vintage lamp manufactures from the mid-1800s to the present day, we've provided that below. They're easy to find, and make a colorful, decorative display in your home, offi, What Is Vaseline Glass? The mark will usually be somewhere inconspicuous and be printed fairly small. The company, based in Jeannette, Pennsylvania, rebranded in 1898 and took on the name Jeannette Glassware. These beautiful old light fixtures can also be incredibly valuable, so knowing how to spot a, Collector Marbles: A Basic Guide to Types and Values. Slag glass antiques will not simply have white streaks blended with another color, but possess a richer, deeper tone. Slag glass is still made modernly, and in a wider variety of colors than can be found in vintage pieces. If you suspect that the piece may be vintage, check for age-related wear or markings on the glass itself or any accompanying hardware, such as lamps or furniture. It is the skill with which original copper foil shades were assembled that largely separates vintage shades from modern reproductions and most fakes. As with many other types of vintage glassware, the slag glass technique can be found in all sorts of different pieces, decorative or functional. The chart below highlights some recently sold slag glass items. VINTAGE SLAG GLASS LAMP All original wiring, Slag Glass Lamp, figural spelter base with, FIGURAL SPELTER LAMP WITH MARBLED ART GLASS, TWO ANTIQUE CZECH GLASS FRUIT BASKET BOUDOIR, ART DECO NUDE FIGURAL LAMP: Cast spelter, FIGURAL SLAG GLASS TABLE LAMP: Patinated, A pair of figural spelter oil lamps, with, Victorian Figural Spelter Lamp of Lady holding. The Pittsburgh Lamp, Brass & Glass Company was assigned at least five lighting-related patents between August 28, 1900 and March 21, 1916. Check the bottom or inside of an item for either a name or logo of a manufacturer. Identifying Silhouette Slag Glass Lamp In Antique American Lighting, Antiques, Uncategorized on February 8, 2016 at 7:02 pm. The Historical Museum Saar is the museum on Saarland's history. Pieces from well-known manufacturers or in rare colors may fetch a higher price. Slag Glass Identification and Valuation - Antique Answers Vintage Lamps and Lighting. Caramel colored slag glass lamp shade on light brown painted foliate design two lighted lamp base with pull chains, no marks found. Examine the area under the burner, and look for a collar. Brown and purple are the most common colors for vintage pieces but Sowerby, as well as other manufacturers, also created some pieces in blue and green with the typical white streaking. Look for manufacturing labels and company embossed stamps and raised imprints on the lamp. Some of the other names for slag glass come from its historical beginnings. This antique glass is known by other names including: Brown malachite Brown marble vitro porcelain Mosaic glass Marble glass Variegated glass Image Credit What Is Slag Glass Made Of? The visual marbling of this slag is reminiscent of slag glass, however, the presence of actual slag in slag glass pieces depends on how it was created. Check for flaws in the glassware 6. Find many great new & used options and get the best deals for Cabinet-Sized Slag Glass Specimen E1700 at the best online prices at eBay! A piece of slag glass will be worth more if it is a rare color or a rare item. This mark is usually made at the bottom of the lamp. The older piece, the greater value it has. The 10 Best Things to See and Do in Saarbrcken, Germany - Culture Trip This glass with unusual colors has an interesting story behind its name and coloration. To clean slag glass, first, remove any dirt or debris with a soft brush. McCrory and Kresge also were major customers. Where the slag is really concentrated it will appear milky white. Saarbrcken campus | Universitt des Saarlandes 3)Check for markings and names: As with most antiques, manufacturers and designers will often leave some form of signature or marking, making it much easier to date and identify vintage slag glass. Then, gently wash the piece using warm water and mild soap. Quick FAQ: -Yes, 99% of Handel lamps are marked. You can email the site owner to let them know you were blocked. The first test in evaluating shades is to closely inspect the quality of the leading, the soldered seams holding the pieces of glass together. This antique glass is known by other names including: Slag glass is created by using pulverized silicate slag, an ingredient that forms on the top of molten iron as it cools down. How to identify a slag glass lamp If the glassware is marked by the manufacturer, you can use that to reverse search information about your piece. Mineral Identification Labels (#185769230073) o***l (1621) - Feedback left by . Identifying Slag Glass. A well-crafted piece of slag glass with the right ratio of additive and correct amount of mixing will strike the perfect balance between looking too chunky and looking too homogenous. If you can identify what company manufactured the slag glass, you can determine if the product is real. Slag glass is a type of pressed glass that is known for its brilliant and vibrant colors. The action you just performed triggered the security solution. White melts into a pale lavender when it intersects with the opaque purple. -Cracked, repaired, or otherwise damaged shades have virtually no value. Thanks for reading! FIGURAL SLAG GLASS LAMP. Discerning Victorian consumers resisted purchasing marbleized glass in some cases and preferred more decorative elements in crystal. This color pattern led to the "brown malachite" and "brown marble" names. Fenton rose crest cornucopia candle holder 2. Take extra care to avoid leaving any streaks or marks on the surface of the slag glass. The key identifying feature of this type of glass is its similarities to the patterning found in natural marble. Sotheby's, New York, NY (December 2017) Estimate: $300,000 - $500,000. Tiffany lamps are famous for the vibrant colors and varied textures used in the glass design. Bradley Hubbard Lamp for sale | eBay Imperial Glass - Guide to Value, Marks, History - WorthPoint Hanging Slag Glass Lamp, ca. CO. SLAG GLASS LAMP Base marked M.L. The key to determining if a piece of glass is "true" slag or just a handsome example of pressed glass is to look for glass that is obviously and richly marbled rather than simply colored or streaked. Both beautiful and elegant in their own regard, stained and slag glass are actually completely different. Identifying slag glass can be a bit tricky, as there are many different types and colors of slag glass. Malachite / Slag Glass Identification Guide + Gallery The principal feature of slag class is that its made from a residue by-product of iron smelting. Popular slag glass lampshades shapes included mushroom, dome and flower petals. By following these tips, you should be on your way to spotting slag glass like a pro. Mosiac glass is sometimes used interchangeably with slag glass, although there are some technical differences. The dimensions Length x Height. Antique lampshades are perhaps one of the most common fixtures for vintage and valuable slag glass. Lamps, lampshades, and chandeliers were very popular uses for slag glass. The following research topics are of particular interest: Physical metallurgy; Thermodynamics and kinetics of metastable phase; Solid metallic glasses; . Most pieces are decorative in nature, sprucing up side tables and bookshelves. The chart below highlights some recently sold slag glass items. Color, age, and manufacturer are definitely important in determining the value of a vintage piece. Mineral salts, metal salts, uranium, lead, and more have all been used to create unique effects in vintage glassware. Dr. Anthony J. Cavo is an honors graduate of the Asheford Institute of Antiques and a graduate of Reisch College of Auctioneering. Some manufacturers of slag glass will label their products as Cinderella or marble glass. These labels indicate that the glass is made from recycled materials, making it easier to identify as slag glass. Avoid using any harsh chemicals or abrasive scrubbing tools, as these can damage the glass. Have any questions? Antique Slag Glass Lamps - Etsy 2. If green-colored glass called the 'slag' is used to make the stained glass, it's probably made in the early 1900s. The history of slag glass goes back to the late 1890s in Gateshead in the northeast of England. If you're looking for a softer glow in your room, install an amber light bulb to create a warmer light. Egyptian patterns were also common due to the interest in the tomb of King Tut in the early 1920s. This material takes on different colors depending on the minerals and elements that are present in the iron. Take a walk down the brick-lined memory lane with these vintage Lego sets. Original Tiffany Lamps employed this metallic finish on the resin base. The three lights retains their 1930s; verdigris patinated spelter female nude dancer, on new Donegan cast iron step base, one arm supports, light with frosted glass globe, 22 in. Cranberry Glass Foyer Lamp - Kovels This will ensure that the money you are spending is worth it. They started with brown glass, but also produced purple, yellow, green, and blue. Overview. Production of slag glass originated in late-19th-century England, where glass manufacturers are thought to have added slag from iron-smelting works to molten glass to create a range of effectsfrom tortoiseshell to marbling. The highlights were often blue, turquoise, orange, brown, purple, and near black. (Source). Purple is the most common slag glass color. Real slag will always have a creamy marble effect. A Hanging Slag Glass Lamp, circa 20th Century Six sides of milky slag glass in a metal frame with a copper finish. In your brief description you failed to mention condition or the presence or absence of any marks or numbers on the base of the lamp. Always remember to inspect glassware in a room with good lighting. Slag glass pieces can sometimes be found at flea markets, antique stores, and online marketplaces. $40.00 shipping. While collectible, the price range varies greatly depending on the item and manufacturer. The base of slag glass is an opaque color, and the streaks are typically a milky white or cream color. Prices go up significantly if a light is signed by a prominent manufacturer like Tiffany Studios or, to a lesser extent, Bradley & Hubbard. Two glassmakers in Pennsylvania, Harry Northwood and Thomas Dugan, were the first to imitate slag glass by mixing two colors of glass together and forgoing the actual slag in 1902. Slag glass was also created by taking two colors of glass and combining them to create what was called "mosaic glass" in 1902 in Pennsylvania by glassmakers Thomas Dugan and Harry Northwood. See also Antique Gone with the Wind Lamp for Sale: A Guide for Buyers and Collectors. Amber Glass Lamp In Collectible Ceiling Light Fixtures Sowerby was a popular producer of this blackberries and cream slag look. If the item does not have any names or marks, the piece likely is a fake. Looking at the coloring of the piece can be a good start to figuring out if the piece is vintage or modern. The marbled pattern and swirled appearance of the glass add to its unique appeal and character. Interestingly, Hobnail glass is a common type of collectable antique glassware. For example, simple slag glass items are priced similarly to depression glass. Check out nostalgic collectibles from one of America's most successful direct sales companies. I can best help you after you email pictures To complete your quote for restoration if you include the following. Slag glass lamps are one of the most sought-after items made of slag glass. A Fenton hobnail 4 1/2-inch vase can go for $15 to $50. How to Identify Vintage Lamps | Urban Americana Accept Read More, We hand-pick antiques for our readers and may, Popular Glass of the 19th and 20th Centuries: A Collectors Guide (Millers Collectors Guides), Most Popular Vintage Corning Ware Patterns (and Price Ranges), Antique Price Guide with Pictures: A Look at Antiques Worth Money, The Best Antique Price Guide Books for Appraising, Blue Willow China: All About This Timeless Classic, Flexible Flyer Sleds: A Closer Look at History, Value, and Quality, What Is Carnival Glass? Outstanding full floral Duffner and Kimberly dogwood lamp. Brush strokes, however, are an indication that the lamp was hand-painted. This being the glass version rather than stone, it makes sense to call it how you . Your caramel slag glass paneled lamp dates from the 1910s through the 1920s. Metal issues or glass issues I may not see in the pictures. You may also wish to polish the piece with a small amount of mineral oil for added shine and protection. The term slag refers to the molten run-off that is produced during iron smelting as the metal cools off. Handel Lamps - oldlampvalues French Art Nouveau "La Serenade" Figural w/ Slag Glass Shade . Slag Glass information from the Glass Encyclopedia You'll be able to tell if this bronze is real if you notice a naturally occurring patina (greenish brown film that results from oxidation). Companies continued to make slag glass items well into the mid-20th century. This wouldnt be considered slag glass in the strict traditional definition, but many collectors will still use the term to refer to any marbled, opaque, pressed glass pieces. Note the glass type 5. How to Tell if You Have a Lamp That's Worth Money - The Nest Art nouveau floral filigree frame shade coloured glass reservoirs and clear glass chimneys, 90cm high/Provenance: Tidenham Manor a lantern, arts & crafts style green glass shade. blue marblised base with circular frosted glass shade, 27cm high spelter figure of a maiden with outstretched arms lying on a hollow art deco design base, single socket fixture, 10 3/4'' h. x 19'' x 8 1/4''. 73- Important Duffner and Kimberly leaded lamp. How to Identify Slag Glass Types and Worth | Heirlooms at Home Look for any imperfections or bubbles in the glass, which can indicate it is not true slag glass. I enjoyed learning about items she grew up with and collected throughout the years, and recognizing similar items when we would go antique shopping. There continues to be a vibrant market for antiques of all varieties due to their breathtaking beauty and exquisite designs. Imperial Glass introduced its iridescent (carnival) glass line in 1909. Instead of slag, they mixed purple glass with a white-colored glass that did not contain any iron slag. Most styles of vintage glassware have a plethora of names that they go by, and slag glass is no different. To differentiate, compare the texture, pattern, and color of the glass to those of known slag glass pieces. There are many high quality reproductions on the market . Some later manufacturers include Boyd, Imperial, and Westmoreland. Some of the most popular manufacturers were Miller, Bradley & Hubbard, Empire Lamp Manufacturing Company, Pittsburgh Lamp, Brass and Glass Company, H.E. 17 1/2" diameter 24" high. Manufacturers used the glass in molds to make bowls, compotes, vases, plant cache pots, and more.

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