Brass make brass was not recognised as a metal. The King James Bible makes many references to "brass". The Shakespearean English form of the word 'brass' can mean any bronze alloy, or copper, rather than the strict modern definition of brass. The earliest brasses may have been natural alloys made by smelting zinc-rich copper ores. By the Roman period brass was being deliberately produced from metallic copper and zinc minerals using the cementation process, and variations on this method continued until the mid-19th century. It was eventually replaced by speltering, the direct alloying of copper and zinc metal which was introduced
Industrial metal metal with industrial music in the late 1980s Pigface, formed by Martin Atkins and including Ministry drummer Bill Rieflin, emerged as an industrial metal collective of sorts, participating with many figures from the noise rock and industrial worlds. Nine Inch Nails, the "one-man-band" formed by Trent Reznor, brought the genre to mainstream audiences with albums such as the Grammy-winning "Broken" and the best-selling "The Downward Spiral", accompanied by their groundbreaking performance at Woodstock '94. The rivethead subculture also developed at this time, along with the so-called "coldwave" subgenre, which encompassed Chemlab, 16 Volt, and Acumen Nation. Some electro-industrial groups adopted