"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...

not really. also, OP didn't state that they were kitchen tiles. could be
floor, bathroom, pool, etc. incidental contact with lead bearing glazes for
kitchen tiles wouldn't be bad either. the OP is talking about leaving them
inside the tank, which is full contact forever.

they allow lead crystal to be used for decanters as long as you don't store
wine in them. long term contact with lead crystal leaches out the lead into
the wine. it's all a matter of how long the contact is.