Crystacal Alpha K is the hardest plaster we have available (apart from the synthetic dental die stones) it is ideal for the manufacture of small models such as chess pieces and reproduction special artefacts which get constant handling. Formulated with a very low water demand, it produces a rock like surface which is also heavy enough to use as a model base where added stability is needed.
Mixing especially by hand to the correct proportions can be challenging, but persistent stirring produces a heavy, gluey consistency which will pour easily and freely.
Plaster/Water Ratio: 100/21
Set Time (mins): 25
Compressive Strength: 89 MN/m2