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Surface of reusable Post-it sticker

Surface of reusable Post-it sticker

H100/0281

Rights Managed

50.8 MB (3.1 MB compressed)

5125 x 3465 pixels

43.4 x 29.5 cm ⏐ 17.1 x 11.6 in (300dpi)

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Credit

DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY

Caption

False-colour scanning electron micrograph (SEM) of the sticky surface of a reusable "Post-it" sticker made by the 3M company. The micrograph shows embedded in the paper the spheres of resin that contain the glue. The spheres, between 15 & 40 micrometres in diameter, are made from urea formaldehyde resin, which ruptures easily under finger pressure. Each time the sticker is pressed to a surface a few spheres burst, releasing a film of glue. Others remain unbroken & can be used on another occasion. In this way, the stickers can be reused many times. In the micrograph, burst spheres appear flattened. Magnification: x26 at 35mm size. Yellow tint. Original is BW print H100/082. Ref: MICROCOSMOS, fig. 9.13, p. 180.

Release details

Model release not required. Property release not required.

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