tufa

tufa ideas from

http://www.the-artistic-garden.com/index.html

Sculpting Recipe

Here is a recipe that will give you a durable, carvable and long lasting hypertufa sculpture. Your aim is to apply this first recipe in thin layers over your armature, building it up to the desired thickness. Then, you will use the 2nd recipe to add one or more layers thick enough to allow you to sculpt to your desired depth.

Recipe for application over the armature
and to build up thickness desired:

1 part Portland cement
1½ parts peat moss
1½ parts coarse sand
Handful of poly fibers
Handful of silica fume

Recipe for the Final Layer(s)

1 part Portland cement
1 part peat moss
1 part coarse sand
Elmer's Carpenter's Exterior Wood Glue
(or other bonding agent)