Misplaced Pages

Glassmaking at Blenko Glass Company

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
How glass is made at a glass company
Various types of glassware in various colors including blue, red, and green
Blenko glassware on display at the Blenko Visitor Center

Blenko Glass Company began producing flat glass in 1922, but did not produce glassware until 1930. The company was founded by William John Blenko, who learned glassmaking in England. Blenko was a chemist who could produce hundreds of colors of glass, and he used his skills to produce antique flat glass that was used to make stained glass windows. During the 1920s, his glass company was named Eureka Art Glass Company, and it manufactured flat glass in Milton, West Virginia.

In late 1929, the United States began an economic depression that became known as the Great Depression. The company experienced a sharp drop in demand for antique flat glass, but survived by adding glassware to its product portfolio. In 1930, the Eureka Art Glass Company changed its name to Blenko Glass Company. During the 1940s, the company began a practice of hiring glass designers who helped the company establish a reputation for contemporary art glass. By 1995, 70 percent of the company's business was glassware such as bottles, vases, and lamps. The remaining 30 percent was the original antique flat glass.

Today (2024), the company's focus is collectible glassware. Glassmaking still involves methods common in the late 19th century. The glass is hand blown by a human glassblower instead of the glassblowing machine invented in the early 20th century. In some cases, the product is reheated in another furnace for additional shaping. A finisher finalizes the product, which can include cutting the glass. The final product is gradually cooled on conveyor that is hot on the starting point and room-temperature at the end. Products are manually inspected before they are made ready for sale.

Background

Further information: Blenko Glass Company

Beginning

The founder of Blenko Glass Company, William John Blenko (1854–1933), learned glassmaking at a bottle works in England. He began working at the plant at the age of 10. Educated as a chemist, he learned to make antique sheet glass that had the look of stained glass windows from Medieval times. Eventually he was exporting antique flat glass to the United States. Blenko had the ability to produce various colors of glass, and his glass was used in stained glass windows. He came to the United States in 1893 to start a glass works in Indiana. The Indiana works failed after about 10 years, and Blenko had two more failures in Pennsylvania and West Virginia. His fourth try began producing in 1922, and he named this firm Eureka Art Glass Company. This company is located in Milton, West Virginia.

Glassware production begins

In late 1929, the Great Depression began in the United States, and few stained glass studios could afford to buy stained glass while construction of new buildings was almost nonexistent. Eureka Art Glass survived by adding glassware to its line of products, which was a change advocated by Blenko's son William Henry Blenko (1897–1969). The company hired two Swedish-American glassmakers to train its workforce to make glassware, and its products were originally sold by a firm known for importing Italian luxury goods. In August 1930, the company changed its name from Eureka Art Glass to Blenko Glass Company. The Italian goods importer, Carbone and Sons, sold Blenko glassware under the name of "Kenova" glass, which it said was manufactured in West Virginia by foreign craftsmen. Blenko also sold glassware directly from its factory, and continued to produce glass for stained glass windows. By the mid-1930s, Blenko glassware was for sale in department stores such as Macy's, Lazarus, and Neiman Marcus.

In 1947, the company hired Winslow Anderson as a full-time designer. This began its use of glassware designers, which enabled it to gain a reputation as a leader in contemporary glassware. During the 1950s, the company employed over 100 people, produced about 280 types of glassware, produced flat glass, and could make about 1,000 different tints. By 1995, Blenko's business was 70 percent glassware and 30 percent flat glass. Its glassware was sold through Sharper Image and department stores such as Bloomingdale's and Nordstrom. In the 21st century, the company survived the difficult periods of the Great Recession and COVID-19 pandemic. By this time the company focused on a different method for selling its glassware. Instead of relying on department stores and small gift shops, internet sales and merchandisers that sold via the internet became the most important way to sell products. In 2024, the company still produced glassware at its West Virginia glass works, and it still used 19th century production methods.

Glassmaking at Blenko Glass Company

Further information: 19th century glassmaking in the United States

Glass is made by starting with a batch of ingredients, melting it, forming the glass product, and gradually cooling it. The batch of ingredients is dominated by sand, which contains silica. Other ingredients such as soda ash, potash, lime, and recycled glass (cullet) are added. Additional ingredients may be added to color the glass. For example, an oxide of cobalt is used to make glass blue. The batch is placed inside a pot or tank that is heated by a furnace. A 2004 description of the Blenko melting process said the batch is heated to about 2600 °F (1427 °C), and cooked for about 24 hours. Then the mixture is cooled to between 2000 °F (1093 °C) and 2300 °F (1260 °C), making it ready to be blown and shaped. Final glass products must be cooled gradually (annealed), or they will break. A conveyor oven called a lehr, hot at the beginning of the conveyor and room-temperature at the end, is used for annealing.

Glassware production

Glassware making at Blenko Glass Company is done using centuries-old processes, with all products handmade. During the 1950s, there were typically ten glassware production teams consisting of six or seven people led by the glassblower. Glassware production begins with a gatherer collecting a "gob" of molten glass from a furnace using a blowpipe. The blowpipe is given to a glassblower who blows into the pipe to shape the glass. The shaping is assisted by the use of tools, and some glass is blown into a mold. In some cases, separate gobs of glass (such as handles) may be added to the main piece. The glass can be reheated in a small furnace called a "glory hole" that makes it easier to modify the glass. Final shaping is done by a finisher who may cut off pieces of glass. The final product is annealed on the lehr. After the glass has cooled on the lehr, the product is inspected, packaged, and shipped.

Blenko glassware production process in 2024 - part 1
  • man forming hot glass attached to pipe Glassblower shapes orange-hot glass
  • shaped glassware detached from rod Glassware is detached from blow pipe for more shaping
  • glassware held in firey oven by pipe Glassware is reheated in oven for more work
  • man trimming red hot glassware Reheated glassware with additional shaping is trimmed
Blenko glassware production process in 2024 - part 2
  • man holding finished, but still hot, glassware with stick Finished glassware product is ready for lehr
  • glassware at end of conveyer being watched by worker wearing gloves Bottle at cool end of lehr
  • Blenko 2024, with unusual font, added to bottom of orange glass bottle Blenko mark added to bottle after inspection
  • glassware in unsealed boxes Blenko glassware products being prepared for shipping

Flat glass production

Flat glass making at Blenko utilized the hand–blown cylinder glass method that was common in the 1880s. During the first quarter of the 20th century, many other flat glass makers replaced well-paid human glassblowers with the Lubbers glassblowing machine. A few years later, the entire process was changed and became more automated. Blenko did not update its method for making flat glass. Its process remained similar to its glassware methodology, but less shaping was needed. After the gatherer retrieved a gob of glass, the glassblower blew a hollow cylinder into a mold. The cylinder was annealed and then cut on both ends. A cut was then made lengthwise on the cylinder and it was placed in a reheating furnace where the cylinder opens and flattens. The glass was then annealed once again.

Blowing the cylinder into a mold is not a normal part of the cylinder method. William J. Blenko received a patent on his process of using an unpolished mold to make the flat glass uniform in size and giving it an appearance that suggests it is old. The patent was called "Art Glass and Method of Making the Same". He filed for the patent on February 26, 1924, and it was granted on May 4, 1926. In the illustration accompanying Blenko's patent, one can see a drawing of the inside of a mold in Figure 1. A gob of molten glass attached to a blowpipe is inserted into the mold in Figure 2. The glassblower blows the gob of glass into cylinder inside the mold, and the mold with the glass cylinder inside can be seen in Figure 3. In Figure 4, the ends of the cylinder have been cut off, and the remains of the cylinder was sliced lengthwise. Figure 5 shows the flat glass after it had been flattened and annealed. Each sheet is uniform in size.

Blenko flat glass production process
  • men blowing into a pipe and forming a cylinder Cylinder method: Glassblowers use blowpipe to blow a cylinder of glass
  • ends of cylinder are cut off, then cylinder is sliced lengthwise Cylinder method: Ends are cut off cylinder and cylinder is cut lengthwise
  • glass is flattened in oven Cylinder method: Cylinder is flattened in oven
  • drawing that shows a gob of glass inside a mold Blenko's patent showing stages of production

Notes

Footnotes

  1. Glassblowers and gatherers used in the window glassmaking process were made obsolete during the early 1900s by a glass blowing machine designed by John H. Lubbers. During the 1920s, flat glass making changed dramatically because of inventions that changed the entire process such as the Colburn process pioneered by Irving Wightman Colburn and Michael Owens, Pittsburgh Plate Glass' 1926 sheet glass machine, and a European method known as the Fourcault process.

Citations

  1. ^ Shotwell 2002, p. 43
  2. ^ Crain 2004
  3. Vaughan, Mary L. (May 15, 1956). "West Virginia Upholds Venice (page B-2)". Washington Evening Star (from Chronicling America: Historic American Newspapers. Lib. of Congress).
  4. ^ Crain 2007
    • Shotwell 2002, p. 43;
    • "Another Factory Will Be Erected (page 1)". Clarksburg Daily Telegram. July 22, 1911.;
    • Katonak, Lynne (August 25, 2002). "Blown away by Blenko (Blenko bits)". Aiken Standard (Newspaper Archive). p. 1C (25). Then, in 1913, a 4 per cent tariff reduction on imported glass shrank an important share of the market, forcing Blenko to close his shop.
  6. Krak 1922, p. 23
    • "A Gift For That Fastidious Friend (advertisement)". Charleston Daily Mail (Newspaper Archive). December 11, 1931. p. 18. Distinctive and different....;
    • "Made at Milton (near center and bottom of page)". Charleston Gazette (Newspaper Archive). September 4, 1932. p. *9 (19). The work of this art glass company has been used in some of the greatest churches and cathedrals in this country and abroad.
  8. Jackson 2000, p. 32
    • Downs, Bill (April 30, 1950). "Many Tourists Drawn to Milton to See Production of Famed Blenko Glassware". Charleston Gazette (Newspaper Archive). p. 28 (66). ...Blenko Glass Co., which is one of the nation's leading producers of fine quality handmade glassware and antique stained glass for church and cathedral windows.;
    • Boggs, Neil (November 26, 1950). "Rt. 60 Village is Composite of Small Towns". Charleston Gazette (Newspaper Archive). p. 13 of Section 2 (37). Exquisite glass products from the Blenko Glass Co. plant have made Milton world-famous....
  10. "Taking panes for the White House". Frederick News Post (Newspaper Archive). May 1, 1995. p. B-7 (15). About 30 percent of Blenko's business is hand-blown panes; the rest is specialty glassware....
  11. Nussbaum, Nancy (May 30, 1995). "White house windowpanes must meet standards of being 'perfectly imperfect'". Clearfield Progress (Newspaper Archive). p. Two (24). ...markets its pieces through Nordstrom's, Bloomingdale's and Sharper Image.
    • "Festival signals Blenko Glass Company's vitality". Bluefield Daily Telegraph (Newspaper Archive). August 8, 2009. p. A-6. A historic West Virginia glassmaker is celebrating its economic recovery....;
    • Born, Molly (May 7, 2021). "How a mythical backwoods monster saved a struggling West Virginia glass company". Winchester Star (Newspaper Archive). p. B4 (16). Blenko Glass Company would partner with a West Virginia artist on immortalizing the mythical Flatwoods Monster, Big Foot's Appalachian cousin....
  13. Casto 2017, p. 12
  14. Richardson, Jesten (February 21, 2024). "Blenko (continued from page 1A)". Charleston Gazette Mail (Newspaper Archive). p. 7A. ...Blenko will probably keep around 10 furnaces....
  15. ^ "Many Tourists Drawn to Milton to See Production of Famed Blenko Glassware". Charleston Gazette (Newspaper Archive). April 30, 1950. p. 28 (66). A growing tourist attraction in West Virginia....
  16. "How Glass is Made – What is glass made of? The wonders of glass all come down to melting sand". Corning. Archived from the original on July 5, 2023. Retrieved July 5, 2023.
  18. Shotwell 2002, p. 94
  19. "A Family Name in Glass". Olney Enterprise (Newspaper Archive). March 18, 2004. p. 22. The mixture is then placed into an oven, heated....
  20. Shotwell 2002, p. 17
  21. "Corning Museum of Glass – Lehr". Corning Museum of Glass. Archived from the original on July 5, 2023. Retrieved July 5, 2023.
  22. "Blenko Glass Plant at Milton Top Producer of Stained Glass". Charleston Gazette (Newspaper Archive). June 28, 1953. p. 5a (37). An important tourist attraction in West Virginia....
    • "Many Tourists Drawn to Milton to See Production of Famed Blenko Glassware". Charleston Gazette (Newspaper Archive). April 30, 1950. p. 28 (66). A growing tourist attraction in West Virginia....;
    • Weeks & United States Census Office 1884, p. 50
  27. ^ U.S. patent 1,583,441, William Blenko, "Art Glass and Method of Making the Same", issued May 4, 1926 

References

Category: