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RuthB

Is It Possible To Take A Mold From Ice?

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RuthB    14

A student's 9 year old daughter found perfect leaf impressions in the recent ice storm. They are in the freezer now. He asked if there was any way they could make a mold from them. The best I can come up with is maybe taking a print off them before they melt. Any other ideas?

 

Ruth

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Pugaboo    438

Latex maybe? Not plaster as it heats up as it dries.you could try mixing sand with glue and filling the form letting it dry. the ice would just melt away but not sure the glue with dry next to a frozen surface,

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Mug    49

Water disolves more things than anything else on earth. Moulding Latex would be one of those. When you are using casting silicon it is best to avoid water. It would be far more simple to cast the leaf directly. I would imagine a molding material that relys on a chemical reaction with little heat may work.  

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46South    2

I would try room temperature plasticine, rolled out to the appropriate size and fairly thick, pressed onto the ice immediately it is removed from the freezer. A light spray of cooking oil on the surface of the plasticine which will take the impression should see a clean lift but if it sticks, leave the ice to melt and you will still have an impression.

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RuthB    14

You just never know where a question to this forum is going to lead! John, I'm forwarding the link about footwear and tire impressions. Hopefully, these are ordinary leaves  ;). Thanks to everyone for your suggestions.  

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jrgpots    231

If you have put the leaves in the freezer, make sure it is not a frost free type of freezer.  The frost free freezer removes humidity from the freezer causing the ice to sublimate (turn from ice directly to gas without thawing).  Items left in this type of freezer will freeze dry.  The leave impression wil be lost as the ice sublimates.

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jrgpots    231

What about clay?

A frost-free freezer will take humidity from anything left in too long.  An old chest freezer that collects ice will not dry things out as much.

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Ask your friendly dentist for a light body impression material.

 

Alginate is the material that dentists and orthodontists use to lift impressions. It's fairly cheap and easy to work with. There was a glass professor at Alfred making some molds with the material... I believe she ordered it from Smooth-On or another mold making material company, but there are venders that provide it at a much more reasonable cost.

 

Good luck!

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