These are the Specular Amount for each of these metals by using the Reflective Formula. Silver= 95.5% Tungsten= 64.9% or 65% Iron= 56.3% Mercury= 78.2% Aluminum= 97.7% Magnesium= 95.5% Platinum= 68.4% Tin= 82.8% Titanium= 62.8% Zinc= 83.8% Lead= 63.3% Gold= 88.4% Nickel= 65.4% Copper= 83.2% Chromium= 64.6%