Water Gel Crystals - "Ghost Crystals"


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Water Gel Crystals - 4 oz. (114g)
GB-5B

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$4.95 ea.

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Water Gel Crystals - 1 lb. (454g)
GB-5C

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$12.95 ea.

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These crystals are made from a super-absorbent polyacrylamide polymer. Placed in water they absorb many hundreds of times their own weight and become virtually invisible. Tie a thread around an expanded crystal, drop it into a glass of water and your crystal seems to disappear! For an additional effect, push a toothpick through the suspended gel. The toothpick seems to mysteriously float in the center of the suspended loop of thread. The index of refraction of the expanded crystals is almost identical to that of water. Can be colored by placing them in a mixture of water and food coloring.

Instant Snow Polymer

When this granular white powder is added to water, it instantly expands to 40 times its original volume, producing a snow-like material.

Magic Sand

Sand that repels water and never gets wet!

Water Gel Animals

These small colored bumblebees don't grow quite as large as the Gro-Beasts but stand up to student use.

Water Gel Spikes

When placed in water these 1" long, 1/4" thick clear, colorless spikes expand to several inches with a corresponding gain in mass as they absorb water.