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Magic Sand

Posted by Hemos on from the flowing-nicely dept.

fist_187 writes "Here's a link to an interesting chemistry video about "magic sand", a hydrophobic solid. I've seen something like this done before with a certain type of pollen. But, this is the first demonstration I've seen that uses a material actually more dense than water."

5 of 37 comments (clear)

  1. I had some of this as a kid... by NetRanger · · Score: 3, Funny

    Did you know that it effectively kills goldfish too?

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  2. Coming up next on Slashdot... by presearch · · Score: 4, Funny

    An in-depth investigation of corn starch!

  3. make your own!!!! by Unknown+Poltroon · · Score: 3, Interesting

    get some clean dry sand
    get old frying pan
    heat sand till it will scorch paper put on top of it
    get some wax/parrifin
    melt wax sparingly into sand, just enough to coat it
    let cool
    break up and repowder
    sand now stays dry!!!!

    THis might be redundant as i havent read the page yet.

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    1. Re:make your own!!!! by HughsOnFirst · · Score: 3, Insightful

      That seems way too hot, more that 400 degrees , the flash point
      of paraffin is 450, the same as for paper.

      Wham-o made theirs with silicone. Here
      is a nice page that goes into the details

  4. For the brave... by JasonMaggini · · Score: 4, Informative

    There is a link for directions here, which basically says to ScotchGuard some baked beach sand... YMMV