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I was just wondering if anyone out there knew how to seal stone in such a way as to make it useful as a food service platter or maybe a cup. I know its possible to use glaze like one would on a piece of pottery (or maybe tile sealant?) but I would like to find some way that 1)doesn't require a kiln and 2) leaves the rock looking like regular rock. Best would be a way that makes the rock look wet but matte and doesn't change the texture. I was thinking something similar to what is used to seal wooden cups but I haven't been able to figure out what is used.

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Kiteman

10 years ago

It depends what kind of rock you're talking about - if it's dense and non-porous, like slate, marble or granite, then all you need to do is polish it. If it's porous, like sandstone, then... ...matt varnish? Try it on a scrap piece. Wooden cups are usually varnished, but may be oiled instead, which doesn't seal them, instead it makes them water-repellent.

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WeissensteinburgKiteman

Reply 10 years ago

I don't think regular use wooden cups are oiled. I know wooden cutting boards have to be oiled regularly, while other serving ware is fine use after use. Getting a piece of stone that can be used after polishing is probably your best bet. Look at the different types that are used for counter tops and go for that.

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finfan7Weissensteinburg

Reply 10 years ago

switching to marble has its own interesting factors. like: is marble micrwave safe?

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Weissensteinburgfinfan7

Reply 10 years ago

I don't see why it wouldn't be...don't count on that though.

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finfan7Weissensteinburg

Reply 10 years ago

I wonder if I could find an old microwave at the thrift shop and test it out. That way if something goes horribly, horribly wrong I've only traded $10-15 for the knowledge. Thanks for the advice.

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finfan7Kiteman

Reply 10 years ago

I am talking about volcanic red rocks like people have for gravel in their yards in the southwestern quadrant of the country. I had thought of varnish, enamel, and lacquer but I wondered if varnish would be food safe. I am not sure if they sell transparent enamel. (even if they do it would change the texture) Lacquer would soak in and I don't know what would happen there. How would it affect taste and would it really have any effect on absorbency?

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Kitemanfinfan7

Reply 10 years ago

Volcanic red rocks are probably a type of granite - just polish it up (although that will take a lot of work).

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finfan7Kiteman

Reply 10 years ago

Well time is one of the few things I have an infinite supply of.