http://forums2.gardenweb.com/forums/load/hypertufa/msg0816290913843.html?27

Scroll down thru the messages; there is an entire (page by page) tutorial posted.

Mesa, The information on making leaf castings is on the Garden Accoutrement Forum under the FAQ on the first page. It says "concrete leaf castings" but it's actually a mortar mix that's used. You can use hypertufa for the castings (I do sometimes)but most people use a mortar mix. Billie

Here is a link that might be useful: leaf castings

I think what you're looking for if you want to make concrete leaves Billie_ann is correct. You have to go to the FAQ in the garden accoutrements forum.

If you want to make copies of a leaf, then you want to go to the tutorial on mold making as mentioned by Rain1950.

Hope that makes it clearer. Casting leaves is great fun but be careful. It's also addictive.