Touch screens are ubiquitous in modern electronic world and are quickly being adapted to more and more devices which previously lacked touch interface. The rapid adaptation of touch-based technology has created a market need for human smudge and residue minimization. The residual fingerprint from direct contact with these devices has resulted in a common aggravation . To counter this persistent and pervasive problem, manufacturers are rapidly developing different technologies to reduce the appearance of fingerprints and contact residue. One technique to improve image clarity has been to reduce the gloss and refractive index difference between the contact surface and the residue as a means to diminish the visual impact. Another surface modification method is based in decreasing the coating surface energy to reject wetting of fingerprint oils most often via an oleophobic material. The poor wetting of fingerprints by oleophobic materials often results in an increase in difference of refractive index between the coated surface and the finger oil, which is easier to clean, yet more visually noticeable. Each of these methods leave the residue chemically unchanged.
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