Mercury silvering Mercury silvering Mercury silvering or fire gilding is a silvering technique for applying a thin layer of precious metal such as silver or gold (mercury gilding) to a base metal object. The process was invented during the Middle Ages and is documented in Vannoccio Biringuccio's 1540 book "De la pirotechnia". An amalgam of mercury and the precious metal is prepared and applied to the object which is then heated, sometimes in oil, vaporizing most of the mercury. The technique is dangerous since mercury is highly toxic, especially in its vapor phase. Mercury silvering can be detected through a variety of
Heavy Metal Soul by the Pound Heavy Metal Soul by the Pound Heavy Metal Soul by the Pound is the fifth full-length album from metal/funk/soul pioneers 24-7 Spyz. Released through the "What Are Records?" label, it is the first album to feature the band as a trio. Former drummer Joel Maitoza returns to replace Anthony Johnson, but the band decided not to replace departed vocalist P. Fluid. Instead, guitarist Jimi Hazel would also become the lead singer (bassist Rick Skatore would also share lead vocal duties in concert). The album, clocking in at nearly 70 minutes, begins with five heavy metal tunes before entering a funk,