Re: Mixing Plaster of Paris
Donald R Izard (dizard@ACSU.BUFFALO.EDU)
Wed, 23 Oct 1996 15:25:33 -0400
Take a can of cooking spray like PAM or a cheaper generic.
Lightly spray the tracks before you pour in the plaster.
I also heard that any spray wax also works, but have not
tried it. It helps the plaster to NOT stick to the track,
and come out clean.
Mix the plaster in a paper cup one track at a time. Use the
propotions listed, but then add just a little more water with a
table spoon or bottle cap full until you get a mix that you
can pour. If it gets, tooo thin, add a cap full of dry plaster
and mix again. However, it starts to set in a few minutes so
you have to use what you mix in a few minutes.
As a nature merit badge counselor, I have done a few tracks.
For bird tracks, I used a colored hot wax, but that needs close
adult supervision, and may not be a good idea for cubs. But it
can make a nice colorful display of OTHER tracks, if you have the
> We're going to try to let some Cub Scouts make plaster of paris casts
> of animal tracks on their next campout, but the ratio of plaster to water
> that's on the package of plaster that we've got seems like it will produce
> a mix more suited for patching holes in the wall than pouring into a
> cardboard ring to make a cast of an animal track. Can anyone give me an idea
> of what ratio of plaster of water works bests? Any other useful ideas
> would be appreciated as well. Thanks!
Terry Howerton Sakima Group, Inc. SCOUTER Magazine Kansas City