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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."

2 of 37 comments (clear)

  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

  2. Re:For the brave... by ealar+dlanvuli · · Score: 2, Insightful
    From the page

    Melting Money and Melting Memos, marketed by So Much Fun, are paper items that dissolve when placed in water. The paper is composed of carboxymethylcellulose (starch) with 20% or less cellulose. This material has been used by organizations such as the CIA for secret or sensitive documents that can easily be destroyed by wetting with water. A number of toys using this are Trash Bag Bunch, the wrapper of Hot Wheels Revealers, and Bye-Bye Diapers.


    Diapers that disolve in water.. interesting
    --
    I live in a giant bucket.