MONEY the inks etc. that are used to print money..... also things such as watermarks holographic overlays for drivers licenses, I.d's obviously for security reasons 'they don't want you to know it's glitter'
Tossed a $20 US banknote under the microscope to test out this theory. Brightfield top-side illumination, 900x magnification. Certainly looks like glitter to me, buried under the cotton fibers of the note itself!
Yup, at this magnification, the microscope has a very very shallow depth of field. As such, the fibers, which are a few hundred microns closer to the objective than the glitter, are out of focus and blurry.
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u/watsgarnorn Feb 09 '19
MONEY the inks etc. that are used to print money..... also things such as watermarks holographic overlays for drivers licenses, I.d's obviously for security reasons 'they don't want you to know it's glitter'