 After automatic machinery was developed, the cost of bulbs fell.Until 1910, when Libbey's Westlake machine went into production, bulbs were generally produced by a team of three workers (two gatherers and a master gaffer) blowing the bulbs into wooden or cast-iron molds, coated with a paste.Around 150 bulbs per hour were produced by the hand-blowing process in the 1880s at Corning Glass Works.