On 18 July, 01:35, "Dave Liquorice"
wrote:

And expensive being porcelain no doubt.

Not really, £15/m2 from Focus DIY. Makes me wonder if the packet is
lying!

I've tried the "does water soak in" test and the "does striking it
with a metal object mark it spark" test. Water doesn't soak in, but
the metal object doesn't spark either. For the sake of them not
falling off the wall, I'll believe the packaging, unless something
proves otherwise.

Cheers,
David.