There's a very good article on Colin Lewis's site. This is for Ciment
Fondue slabs and pots, not hypertufa which I think would be too weak.

The article did have an error in the mix though. You have to add a
proportion Ordinary Portland cement to the Ciment Fondue or Hi Alumina
cement or the rapid setting never occurs!

Experiment with small quantities and you can achieve anything from
instant set to as long as you need to finish working.

It takes a fair bit of practise and some skill to end up with a rock
like finished product. Cement colouring powder in black and brown, as
used for making coloured paving or blocks, can be used to get nice
variation in the finish.

Cheers

Kev Bailey
Vale Of Clwyd, North Wales

I've found an excellent article in Bonsai Today on making slabs. I'd
also like to try making some rocks for cascades ... cliffside things,
you know. Anyone have any instructions or tips ?


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