<prompt> In non zinc containing dental amalgam alloy, the percentage of zinc present isLess than 0.02Less than 0.1Less than 0.01None of the above  <response>: The ANSIADA specification also includes a notation about the presence of zinc in amalgam alloys, with more than 0.01 zinc classified as zinc containing and those with less than 0.01 as non-zinc alloys. Zinc has been included in amalgam alloys as an aid in manufacturing; it helps produce clean, sound castings of the ingots used for producing lathe-cut alloys. The presence of contamination within the amalgam must be avoided because it can degrade the integrity of the restoration. 