Mylar is the trademark name of Dupont. It is simply PET plastic sheet. Has been around since the 50s. Commonly used for stencils, etc. Typical thickness is 7 to 10 mil, or .007 to .010 inches, but can be had in other thicknesses, of course. Can be bought by the bundle for cheap nearly any craft store and the web.MadmanWithaWhistle wrote:I thought it involved sputter coating, like how organic samples are metalized prior to examining with an electron microscope.Peter Duggan wrote:There's no metal in Mylar.
I'm sure there are multitudes of composites etc if you want to find it. I'm not sure of the composition of mylar balloons.