[Update] Matt has pointed out that these are called Zubbles, and on the website you can see photos of them. Thanks, Matt!
Clear bubbles will soon be a thing of the past – retro, even. An idea by Tim Kehoe, and perfected by dye chemist Ram Sabnis has become a reality. Read the full story on the Popular Science magazine website.
They have managed, through years of trial and error, dangerous, staining dyes, chemical burns, and clever chemistry, to create bubbles of nearly 300 colours. There’s even a black bubble, which will certainly be popular with the goth community…
When the bubbles pop, they temporarily stain you, but after a few minutes, the colour disappears entirely, on its own. There is no need to wash it out. Tim Kehoe is working on a number of projects that make use of this new temporary dye – and since industry has nearly always been concerned with colour fastness, expect to see some novel uses of a temporary dye in years to come.