Invisible logos may be made by forming a hydrophilic coating and a hydrophobic coating on a substrate surface, so that a portion of the hydrophilic coating and a portion of the hydrophobic coating are exposed. The invisible logos are undetectable to the human eye, but may be temporarily viewed in response to stimuli.


< Non-aqueous injectable formulations for extended release of somatotropin

< Use of Emu Oil and its various fractions as a carrier for antifungal, antibacterial, and antiviral medications and preparations

> Fiber grating environmental sensing system

> Polyisobutene composition

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