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

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from: https://www.tumblr.com/blog/view/aleeb0w/80545917721