how to make mould for plaster baby hand cast?

[LookingForwardToSummer]

I want to make a cast of my 3 month old dds hand, but I'm having trouble maki g the mould. Tried playdoh but it stuck to the plaster, even with vaseline layer.

[emskaboo]

You can buy kits in art shops or aliginate stuff for making mold, it is great but a wee bit pricey.

[emskaboo]

mould, oops