Anti-counterfeiting ink is a covert security feature which uses ink that is invisible unless illuminated by a particular wavelength of light. The effect is usually reversible, with the ink becoming invisible again within one or two minutes of being exposed…
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By Shelley Farrar, MSc, BSc Fluorescence Microscopy allows specimens to be studied with high sensitivity and specificity through the use of light. It works on the principle that energy emitted by certain types of materials can be detected as light,…
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