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False-colour SEM of scratch & sniff sticker

False-colour SEM of scratch & sniff sticker

H100/0224

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50.4 MB (50.0 MB compressed)

5050 x 3491 pixels

42.7 x 29.5 cm ⏐ 16.8 x 11.6 in (300dpi)

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Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

False colour scanning electron micrograph of a scratch & sniff sticker showing the scratched (rough) & unscratched (smooth) microspheres, which contain scent. Scratch & sniff, a 3M company product, uses the same technology as the reuseable "Post- it" note pads (also 3M's). The glue is contained in tiny spheres (15-40 micrometers) of urea formaldehyde resin, which rupture under finger pressure. Not all the spheres rupture at once making the stickers reuseable. A common form of scratch & sniff are tattoos, which are stuck to the skin using the glue spheres, while the outer surface contains scent spheres. Magnification: X286 at 35mm size. Original is BW print h100/217.

Release details

Model release not required. Property release not required.

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