#1095: Solaroid

Just when you thought that Polaroids were finished with…
today’s invention is a low-cost sunburn avoidance tool.

A Polaroid sheet is tightly clamped within a container using a grid of bars which separate the sheet into separate windows. Each window has a light-impermeable hatch.

claire_muldoon_sunbathing

When sitting on the beach, one window containing a reference colour would be opened. The adjacent window would then be opened, exposing a calibrated square of film to the sun’s rays.

When the film square and the calibrated colour become visually indistinguishable, it’s time to head inside.

3 Comments:

  1. Just like radiation timers then? They use the same principle but different materials in front of the film

  2. Oh, I had no idea. Is there a link which describes this stuff?
    P

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