Half a croissant, on a plate, with a sign in front of it saying '50c'
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Fading Sale Price Tag

Buy it before its sale price is gone.
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Ink that fades over the next few days with the sale price and bar code prompts the buyer to “act now”.

How long is the sale on? No telling because they all fade at different rates.

doctorremulac3, May 12 2024

Inspired by Disappearing_20price_20tag
[doctorremulac3, May 12 2024]

Latent_20etiolation_20messages [hippo, May 13 2024]


21 Quest, May 13 2024

       If your shop window is in direct sunlight, this could be a use for 'Latent etiolation messages' technology (see link)
hippo, May 13 2024

       Cool link, that would definitely be the same branch of chemistry applied here.
doctorremulac3, May 13 2024


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