A way to test them is to put some lemon drops on the surface of the tile...
Also, u can find different kind of tiles, porcelain is a high temperature
clay, and then should be a lot more resistant to anything.

--
Paulo
"james" wrote in message
news:qlYcc.410$es.107@fed1read02...
In article ,
Charles Spitzer wrote:

neither the glaze nor the tile may be safe. there's a lot of glazes that
aren't food safe (contain lead, cadmium, etc) and could leach metals from
either a basic or acid solution in contact with it. you'd have to find
out
what is in them from the manufacturer, and they probably don't know since
tiles typically don't have a msds.

Anybody selling a kitchen tile laced with toxic heavy metals is just
asking for litigation...