Metlox Pottery
Metlox Pottery was an American ceramics manufacturer known for California-themed dinnerware, architectural ceramic signs, decorative figures, and other glazed pottery.
Last updated August 31, 2026
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Overview
Metlox Pottery, formally the Metlox Manufacturing Company, was an American ceramics company based in Manhattan Beach, California. It developed from Proutyline Products, a Hermosa Beach business founded in 1921 by Theodor C. Prouty and his son Willis Prouty to manufacture patented architectural tiles. In 1927, the Proutys established Metlox Manufacturing as a division of that business. The name Metlox was formed from “metal” and “oxide,” referring to the glaze pigments used in the company’s ceramic products. Metlox initially specialized in large outdoor ceramic signs. Its glazed ceramic surfaces were durable in outdoor conditions and provided an insulated base for decorative neon tubing. The company supplied signs for commercial and entertainment venues, and a surviving example associated with the Pantages Theater in Hollywood illustrates the scale and visibility of this early work. The growth of movie theaters helped sustain the business during the early years of the Great Depression. After Theodor Prouty died in 1931, Willis Prouty assumed control. As the market for large ceramic signs weakened, Metlox shifted toward household ceramics and dinnerware. The company introduced its first dinnerware pattern, California Pottery, in 1932, drawing on the popularity of brightly colored California ceramics. Metlox was incorporated on October 5, 1933. Its 1934 Poppytrail line, named after California’s state flower, became one of its best-known product families and later formed part of the Metlox-Poppytrail identity. Evan K. Shaw, associated with American Pottery in Los Angeles, purchased Metlox from Willis Prouty in 1946. During the 1950s, Metlox expanded its design vocabulary with modernist dinnerware using free-form shapes, squared plates, colored blanks, and applied decoration. Patterns marketed as California Contempra, California Modern, and California Freeform reflected the period’s interest in informal, streamlined, and regionally expressive tableware. The company also made large ceramic horses and carriages, along with vases, figurines, and miniatures. Artist Carl Romanelli designed some of these decorative pieces. In 1970, Metlox introduced Poppets, a collectible series of ceramic people planters designed by studio potter Helen Slater. The line broadened the company’s appeal beyond functional tableware and became part of the collectible California pottery market. Metlox’s products are now encountered primarily through vintage-ceramics dealers, collectors, estate sales, and secondary-market listings rather than through an active retail business. The company faced a major product-safety crisis in March 1971, when the United States Food and Drug Administration announced a recall involving more than 400,000 pieces because of excessive lead in glaze. Metlox voluntarily recalled selected California Poppytrail Tempo and Mission Verde series, as well as part of the Petalburst pattern in its Vernonware line. One suspected poisoning was associated with the incident, although the available account states that the remainder of Metlox’s pottery did not exhibit lead leaching. Metlox’s corporate incorporation was terminated on January 4, 1988. The Manhattan Beach pottery factory subsequently closed in 1989, after approximately six decades of operations under the Metlox name and its predecessor businesses. The former 97,000-square-foot site was later redeveloped for uses including the Shade Hotel and other businesses. Following closure, residual lead dust and other hazardous byproducts from pottery production remained a property and remediation concern. Metlox is therefore remembered both as a significant Southern California ceramics manufacturer and as a collectible pottery brand whose industrial legacy continued after its factory ceased production.
History
Metlox’s origins lay in Proutyline Products, founded in Hermosa Beach, California, in 1921 by Theodor C. Prouty and his son Willis Prouty. The company produced patented architectural tiles made from a clay mixture with a high concentration of talc. This material helped establish the technical foundation for the later Metlox business. In 1927, the Proutys created Metlox Manufacturing Company as a division of Proutyline Products. The name combined references to metal and oxide, reflecting the glaze pigments used to color the company’s ceramics. Metlox first concentrated on large outdoor ceramic signs. The glazed surfaces resisted weathering and also served as insulating supports for neon tubing. These products were particularly suited to commercial architecture and entertainment venues. A surviving Metlox sign associated with the Pantages Theater in Hollywood is an example of this early work. The expansion of movie theaters helped the company maintain business during the initial years of the Great Depression. Theodor Prouty died in 1931, after which Willis Prouty took over the business. As demand for large ceramic signs declined, Metlox redirected its manufacturing capacity toward tableware. The company introduced California Pottery, its first dinnerware pattern, in 1932. The following year, on October 5, 1933, Metlox Manufacturing Company was incorporated. In 1934, the company launched Poppytrail, a line named for California’s state flower. Poppytrail became one of Metlox’s most recognizable product identities and later appeared alongside the Metlox and Vernonware names in the company’s broader catalog. Evan K. Shaw, of American Pottery in Los Angeles, bought Metlox from Willis Prouty in 1946. Under the postwar business, Metlox continued to develop tableware and decorative ceramics. In the 1950s, it introduced modernist dinnerware based on free-form designs and squared plates. The production process used shaped blanks that could then receive different decorations and color treatments. The California Contempra, California Modern, and California Freeform patterns expressed this mid-century design direction and connected Metlox to the wider California modernism movement in ceramics. Metlox’s output extended beyond dinnerware. During the 1950s, the company produced large ceramic horses and carriages, as well as vases, figurines, and miniatures. Carl Romanelli designed some of these objects. In 1970, studio potter Helen Slater designed Poppets, a group of ceramic people planters. Poppets added a whimsical collectible category to the company’s established lines of functional and decorative pottery. A serious setback occurred in March 1971, when the FDA announced a recall of more than 400,000 pieces of Metlox pottery because of excessive lead in the glaze. The company voluntarily recalled the California Poppytrail Tempo and Mission Verde series and part of the Petalburst pattern in its Metlox Vernonware range. One person was suspected of having been poisoned. The available historical account indicates that the rest of Metlox’s pottery did not present a lead-leaching problem, but the recall remains the most significant documented safety controversy in the company’s history. Metlox’s incorporation was terminated on January 4, 1988. The factory closed in 1989 after 62 years of Metlox operations. The approximately 97,000-square-foot former industrial site in Manhattan Beach was later redeveloped, including for the Shade Hotel and other businesses. Environmental concerns continued after closure because lead dust and other hazardous byproducts of ceramic production remained at the property. Metlox no longer operates as a manufacturer, but its dinnerware, Poppytrail and Vernonware patterns, modernist forms, figurines, horses, carriages, and Poppets remain subjects of collecting and California pottery scholarship.
- 1989
Manhattan Beach factory closes
[1]The pottery plant closed after approximately 62 years of operation.
- 1988
Corporate incorporation terminated
[1]Metlox’s incorporation was terminated on January 4, 1988.
- 1971
Lead-glaze recall
[1]The FDA announced a recall of more than 400,000 pieces because of excessive lead in the glaze; Metlox voluntarily recalled selected patterns.
- 1970
Poppets introduced
[1]Metlox began producing Poppets, collectible ceramic people planters designed by Helen Slater.
- 1950
Modernist dinnerware expands the range
[1]During the 1950s, Metlox developed California Contempra, California Modern, and California Freeform designs using free-form and squared dinnerware shapes.
- 1946
Evan K. Shaw acquires Metlox
[1]Evan K. Shaw of American Pottery in Los Angeles purchased Metlox from Willis Prouty.
- 1934
Poppytrail launched
[1]Metlox introduced Poppytrail, a line named after California’s state flower that became one of its signature identities.
- 1933
Metlox Manufacturing incorporated
[1]The company was incorporated on October 5, 1933.
- 1932
California Pottery dinnerware introduced
[1]Metlox shifted toward household ceramics and launched its first dinnerware pattern, California Pottery.
- 1931
Willis Prouty assumes control
[1]Following Theodor Prouty’s death, Willis Prouty took over the business.
Products and positioning
A Southern California ceramics maker that moved from durable architectural signage into colorful, California-themed household pottery, modernist dinnerware, and collectible decorative ceramics.
Dinnerware · 1934
Poppytrail
Introduced in 1934 and named for California’s state flower, Poppytrail became one of Metlox’s best-known dinnerware identities. The line is associated with colorful, California-oriented tableware and is now frequently encountered in the vintage and collectible ceramics market.
Dinnerware · 1932
California Pottery
California Pottery was Metlox’s first dinnerware pattern, introduced in 1932 as the company moved away from its earlier concentration on architectural ceramic signs. It represented the beginning of Metlox’s long-term focus on household tableware.
Modernist dinnerware · 1950
California Contempra
California Contempra was part of Metlox’s 1950s modernist tableware output. The company used shaped blanks that could be decorated in different colors and patterns, allowing free-form and streamlined forms to be combined with varied surface treatments.
Modernist dinnerware · 1950
California Modern
California Modern was one of Metlox’s mid-century dinnerware pattern families. Its design direction reflected the period’s interest in simplified forms, strong color, and informal California-associated modernism.
Modernist dinnerware · 1950
California Freeform
California Freeform used nontraditional shapes and decorative treatments within Metlox’s 1950s tableware program. It formed part of the company’s effort to distinguish its products through sculptural silhouettes as well as glaze and pattern choices.
Dinnerware
Vernonware
Vernonware was a Metlox-associated dinnerware identity that included multiple patterns, including Petalburst. Some Vernonware pieces were affected by the company’s 1971 lead-glaze recall, while the historical account states that the remainder of Metlox’s pottery did not show lead leaching.
Decorative ceramic planters · 1970
Poppets
Poppets were collectible ceramic people planters designed by studio potter Helen Slater and produced beginning in 1970. Their character-based forms gave Metlox a whimsical decorative line beyond its traditional dinnerware and architectural products.
Architectural ceramics · 1927
Architectural ceramic signs
Metlox’s early specialty was large glazed ceramic signage for outdoor commercial and entertainment settings. The material was resistant to the elements and could insulate decorative neon tubing. A surviving sign above the entrance to Hollywood’s Pantages Theater is associated with this part of the company’s history.
Controversies
1971
Lead-glaze pottery recall
In March 1971, the FDA announced a recall of more than 400,000 Metlox pottery pieces because of high lead content in the glaze. Metlox voluntarily recalled its California Poppytrail Tempo and Mission Verde series and part of the Petalburst pattern in the Metlox Vernonware series. One suspected poisoning was reported. The available account states that the remainder of Metlox’s pottery did not present lead-leaching problems.
Brand decisions
1989
Cease pottery manufacturingStrategyBackground
Metlox’s incorporation had been terminated in 1988 after decades of ceramics production.
Action taken
The Manhattan Beach pottery factory closed in 1989.
Aftermath
The former factory site was later redeveloped, while environmental concerns relating to lead dust and other pottery-production byproducts remained associated with the property.
1971
Voluntary response to lead-glaze recallOtherBackground
The FDA identified excessive lead in the glaze of more than 400,000 pieces of Metlox pottery.
Action taken
Metlox voluntarily recalled selected California Poppytrail Tempo and Mission Verde products and part of the Petalburst Metlox Vernonware series.
Aftermath
The recall became the company’s most significant documented product-safety controversy. The historical account states that the remainder of Metlox’s pottery did not present lead-leaching problems.
1932
Shift into dinnerwareStrategyBackground
Demand for large ceramic signs began to decline, while brightly colored California tableware was gaining popularity.
Action taken
Metlox adapted its facilities to produce household ceramics and launched California Pottery, its first dinnerware pattern.
Aftermath
Dinnerware became a central part of Metlox’s business and led to later lines including Poppytrail and modernist California patterns.
1927
Enter large-scale ceramic signageStrategyBackground
Metlox was established as a division of Proutyline Products, whose earlier business centered on patented architectural tiles.
Action taken
The new company concentrated on large glazed ceramic signs for outdoor commercial and entertainment venues, including signs designed to support neon tubing.
Aftermath
The signage business benefited from the expansion of movie theaters but later weakened, encouraging Metlox to diversify into dinnerware.
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