The value of slag glass items can also be determined by the condition of the item. Included one glass screen with crack with figures of 2 seated nude maidens either side of center lamp with multi-color glass globe shade, no visible markings. The term slag glass is often used interchangeably with the terms flashed glass and stained glass. However, slag glass is a type of stained glass made from recycled materials. This is one of the most common uses for slag glass, and you'll see many slag glass chandeliers and other fixtures in antique shops. 100 Professional Tiffany-Slag Curved Glass Repairs The following research topics are of particular interest: Physical metallurgy; Thermodynamics and kinetics of metastable phase; Solid metallic glasses; . Slag Glass Identification and Valuation - Antique Answers Handel lamps with metal overlays over slag glass are from the company's "Teroca Ware" line. As molten iron cools, a silicate slag forms on top of it. These tips and tricks can help to ensure further that a piece is indeed slag glass. Some of these names can be used synonymously, but some of them have slightly different meanings that a serious collector should be aware of. One of the most common alternate names for slag glass is marble glass, for obvious reasons. How to Identify Vintage Lamps | Urban Americana Malachite stones have wavy striping in a green-tinged milky white on top of a darker green. Malachite / Slag Glass Identification Guide + Gallery Prof. Dr. Ralf Busch | Faculty of Natural Sciences and Technology I grew up going to antique stores and markets with my mom and grandmother. All rights reserved. 1. Bradley And Hubbard Lamp - 31 For Sale on 1stDibs It could have internal or external threads. For example, slag glass pieces with distinct marbling patterns or interesting shapes may be more valuable to collectors. An Identification Guide for Beginners, Atlas Mason Jar Identification and Value Guide, Vases, Compote, Creamer, and Bowls, Lot of 7. While collectible, the price range varies greatly depending on the item and manufacturer. The worth and value of slag glass varies. 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. Inspect the glass closely and see if you can spot tiny specks of color - known as 'confetti' glass - a sure fire sign that the lamp is genuine. Pieces from well-known manufacturers or in rare colors may fetch a higher price. But before you buy or start working with slag glass, it is important to know how to identify it correctly. Slag glass producers mark their products with the companys initials or the companys logo. Its important to note that newer slag glass pieces may not have as much character or value as older ones. Happy cleaning! Popular slag glass lampshades shapes included mushroom, dome and flower petals. This glassy residue would vary in tint and colordepending on the minerals and chemicals used in steel production, resulting in a glossy, opaque, marbled effect. If you're a collector of antique lighting, you've likely come across slag glass lamps. Whether you just found the slag glass table lamp of the century in the back barn or at an estate sale. Imperial Glass introduced its iridescent (carnival) glass line in 1909. Production of slag glass originated in late 19th century England. They're easy to find, and make a colorful, decorative display in your home, offi, What Is Vaseline Glass? Rubber and vinyl coated wires were not used until the post-World War II era. Slag glass is also sometimes used to refer to marbled glass pieces that didnt technically use slag as an additive. eBay (258) Magazine. This common characteristic of slag glass can add to its unique appearance. 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. Early examples of slag glass already came in a variety of colors, but modern styles of mosaic glass are available in a seemingly endless array of hues and shades. The result is a material that lies somewhere between porcelain and glass. Search Alerts. Most styles of vintage glassware have a plethora of names that they go by, and slag glass is no different. Egyptian patterns were also common due to the interest in the tomb of King Tut in the early 1920s. Without the need for the residue product of iron ore, the manufacture of mosaic glass exploded in Europe and the US and its popularity has not waned since. Manufacturers experimented with different methods to achieve this malachite-like look. Polly Pocket: History & Value of Barbies Biggest 90s Rival. Cabinet-Sized Slag Glass Specimen E1700 | eBay In this guide, we'll explore the history and characteristics of collectible slag glass lamps. Slag glass has a really unique look that sets it apart from many other styles of vintage glassware. How to Get Conch out of Shell without Breaking. The marble should never be streaky and it should blend well with the color of the glass. 10 Easy Steps on How to Identify Slag Glass Step 1: Look for a Marbled or Swirled Pattern One of the easiest ways to identify slag glass is by its marbled or swirled pattern. 4. Consult a professional or experienced collector if youre unsure about a pieces authenticity. (History, Series & Value). 1230A - 10 1/4 Alpha Art Glass Green Vase Lamp. One item where slag glass was used often was in the creation of antique oil lamps, chandeliers and lampshades, particularly during the Art Deco and Art Nouveau periods during the late 19th and early 20th century. Hanging Slag Glass Lamp, ca. Glass Type. Note the glass type 5. However, towards the edge of the streak, the slag may instead be a lighter and creamier version of whatever the base color was since they were more mixed together. While it may not be as popular as other types of glass, slag glass is beautiful in its own way. If the item is in good condition, with no cracks, discoloration, or signs of neglect, it will be worth more. 8 Tips for Identifying an Antique Lamp Get the best deals on Amber Glass Lamp In Collectible Ceiling Light Fixtures when you shop the largest online selection at eBay.com. 2023 Active Interest Media All rights reserved. As with any glass type, or art in general, different circumstances and people have adopted different names for slag glass. Purple is the most common slag glass color. This type of art glass is highly sought after by collectors, so its definitely worth taking the time to learn how to identify it. How to identify Fenton glassware 1. They may have additional insight or knowledge on identifying slag glass. Very similar to the photo on page 182 of Paul Crist's book. If it feels bumpy or uneven, its likely slag glass. Use proper lighting to see the marbling and swirled patterns of slag glass. 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. This pattern looks like clouds or waves and can range from subtle to bold. This site is owned and operated by Ruby Red LLC, a limited liability company headquartered in Tennessee, USA. Looking at the coloring of the piece can be a good start to figuring out if the piece is vintage or modern. Would anyone know the company that might of cast this lamp base? Slag glass was originally created in the United Kingdom in the 1890s by adding this slag substance during the glass-making process. A Hanging Slag Glass Lamp, circa 20th Century Six sides of milky slag glass in a metal frame with a copper finish. Look for labels indicating the glass is made from recycled materials, such as Cinderella or marble glass.. Tiffany lamps are famous for the vibrant colors and varied textures used in the glass design. Imperial Glass - Guide to Value, Marks, History - WorthPoint Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. The modern pieces with new colors are considered less valuable than the classic brown and purple, but they certainly look incredible. Happy collecting! Real slag will always have a creamy marble effect. Its no surprise that this style is most typically referred to as marble glass. Two of these patents, numbers 656891 and 774602, clearly depict the SUCCESS burner in their accompanying patent drawing. The molten glass is placed into forms and then pressed to get the right shape and emboss the surface with a pattern. Slag glass lamps are one of the most sought-after items made of slag glass. The light shining through the marbled color creates a really unique effect. 9. Our up-to-date information will give you an accurate understanding of your items' worth. While Handel first produced mosaic glass shades for its lamps, they soon branched into other design areas. Instead of slag, they mixed purple glass with a white-colored glass that did not contain any iron slag. These lamps rarely sell for less than 100 dollars. Examine the area under the burner, and look for a collar. Stepped marble LAMPS.Two antique Czech glass fruit basket boudoir lamps., Cast spelter metal bases with figural handles, (one pair of handles as is). Save my name, email, and website in this browser for the next time I comment. Instant Appraisal and makers marks for Slag Glass Lamp | Antiques Slag glass is not completely opaque like frosted glass. The chart below highlights some recently sold slag glass items. Depending on the rarity of the item, slag glass is worth anywhere from $50 to $1500. Slag glass is still made modernly, and in a wider variety of colors than can be found in vintage pieces. Antique Purple and White Slag Glass Cake Stand, Antique EF Industries Green Slag Glass Table Lamp. Slag glass is a term used to describe a type of colored pressed opaque glass made using the "slag" left over during the iron smelting process. Lighting FixturesPettingell-Andrews Company, c. 1910, Gas and Electric LampsWelsbach Company, c. 1910. A glass decoration plant opened in early 1968. Look out for its bases and edges 4. Jeannette Glassware, originally Jeannette Bottle Works, was founded in 1888. The company mass-marketed lamps, tableware, and tumblers. Have you ever wondered what someone meant by slag glass? Unique antique lamps, especially those made during the Victorian era, had glass that was hand blown. The mark will usually be somewhere inconspicuous and be printed fairly small. How to identify a slag glass lamp. This is something people will often wonder about. Gallery of Antique Aladdin Lamps - From 1 to 23A Have you ever seen a piece of glass and wondered where it came from? 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. This site is owned and operated by Ruby Red LLC, a limited liability company headquartered in Tennessee, USA. Conduct research 2. Your IP: According to Norman Webber, some companies referred to slagware as end of the day wear because glassmakers collected slag from the surface of iron right before they poured it at the end of the day. Look for manufacturing labels and company embossed stamps and raised imprints on the lamp. Ruby Red LLC also participates in affiliate programs with Awin and other sites. An antique piece from the UK would typically have one of these markings: While American vintages would bear the marks of: Be sure to check out this comprehensive guide on antique glass markingsto know what to notice when appraising an antique piece of glass. In this case slag, a by-product from iron smelting, is mixed into the molten glass before pressing. Caramel 'Slag Lamp' Value Lights Up - Antique Trader Many antique lamps of these periods were made with stained glass, rather than slag glass, and a careful review of the glass opacity and patterns is necessary to determine the difference. This slag is predominantly binary compoundsof elements such as silicon, sulphur, and aluminium reacting with the sides of foundry molds. I use this term only because it has become a widely known, accepted, descriptive term for pressed opaque glass with swirls or streaks, even though the likelihood of it containing any slag is remote. His masterpiece is the Lutheran Ludwig's Church, which stands at the centre of a rectangular plaza. List of Vintage Lamp Manufacturers Advertisement About Paul Phipps Pictures of both the inside and outside of the lamp. The Pittsburgh Lamp, Brass & Glass Company was assigned at least five lighting-related patents between August 28, 1900 and March 21, 1916. This being the glass version rather than stone, it makes sense to call it how you . The lamps and shades often included intricate bronze and brass metalwork featuring scrolling floral, foliate, relief and decorative patterns. French Art Nouveau "La Serenade" Figural w/ Slag Glass Shade . (Source). Look for any imperfections or bubbles in the glass, which can indicate it is not true slag glass. Slag glass also has a rough texture compared to other glass types. Slag glass antiques will not simply have white streaks blended with another color, but possess a richer, deeper tone. Slag glass can come in a range of colors, including shades of green, brown, pink, blue, and purple. The value of slag glass can vary greatly depending on factors such as age, condition, and rarity. This guide will explain how slag glass was made, when it was popular, and what its worth. Large Signed Rousseau Art Nouveau Figural Lamp w/ Slag Glass Petal Shade. Caramel colored slag glass lamp shade on light brown painted foliate design two lighted lamp base with pull chains, no marks found. Slag Glass Lamp | Ruby Lane Free shipping for many products! Consulting with a professional or experienced collector can help determine the approximate value of a particular piece of slag glass. As long as you consider the key characteristics marbled pattern, rough texture, translucent quality you should be able to identify it accurately. Happy collecting! The addition of iron slag into the process gives slag glass its unique features, while stained glass is made from a simpler process of colouring the glass with vitreous paints. As always, make sure to do your due diligence when buying or selling any antique, and remember there are many free online appraisal sitesyou can consult as well. Because slag glass is made from recycled materials, it often contains small bubbles or imperfections on its surface. Quick FAQ: -Yes, 99% of Handel lamps are marked. There are several things to keep in mind when looking to identify whether something is slag glass or not. Work with a qualified appraiser to help you identify the manufacturer and type of slag glass antiques you have, including antique glass insulators, to determine the true market value. Challinor Taylor & Co. was one of the most prominent American Slag glass manufacturers. [more like this] FIGURAL SLAG GLASS TABLE LAMP: Patinated spelter figure of a standing woman on art nouveau style base, double socket fixture, no visible makers mark, 23 3/4'' h. x 7 1/2''. Hopefully, these tips will help make your search for slag glass a successful and enjoyable experience. This marbling is one of the best ways to identify slag glass. How to Identify an Antique Oil Lamp | Hunker Peachblow was produced between 1955 and 1963. The marbled effect is gorgeous on its own, but shining light through a complicated and colorful design is even more stunning. How to Identify Slag Glass | 10 Easy Steps (2023) Color, age, and manufacturer are definitely important in determining the value of a vintage piece. The Pittsburgh Lamp, Brass & Glass Company - The Lampworks 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! 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. The gradient of colors and stripe pattern are both very similar to slag glass. France, Late 19th Century. Co. 240, rewired, new AMERICAN EARLY 20TH CENTURY SLAG GLASS LAMP With a 16 inch slag Nice, original 8 panel caramel slag glass lamp, circa 1920-30, in 384. 1. I can best help you after you email pictures To complete your quote for restoration if you include the following. A beautiful pieceno matter the age or valuehas the ability to brighten a room and add character to interior decor. Vintage Lamps and Lighting. Shade measures 7 1/4" x 16 1/2". 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. In some of the most stunning lighting pieces, small pieces of the slag glass were laid out in a metal framework. This type of glass was used to make all types of glassware, including panels for lamp shades. Find Fenton markings 3. How to Identify Slag Glass Types and Worth | Heirlooms at Home
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