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lulz-time:  Polymer absorbs water and expands. It keeps almost the same refractive properties as water and appears invisible. The polymer is Sodium Polyacrylate (thank you, thecraftychemist!)  Featured on a 1000Notes.com blog
lulz-time:  Polymer absorbs water and expands. It keeps almost the same refractive properties as water and appears invisible. The polymer is Sodium Polyacrylate (thank you, thecraftychemist!)  Featured on a 1000Notes.com blog