15 to 20 minutes
plaster of paris, or if you want an ink print you can take fingerprinting ink and set you dogs foot on it then set it on paper.
It produces an exthermal heat
Because moisture makes it set hard
Gypsum The gypsum is heated to about 1500C to remove its H2O (water) content. It becomes a dry powder, with the chemical name gympsum hemihydrate or, more accurately calcium sulfate hemihydrate. CaSO4.1/2H2O
It is best not to speed up the drying time for plaster of Paris. If you speed up the drying time it will not set up as it should. If you still want to speed up the time, you could use a blow dryer.
First you need to recognize that "plaster" is not a singularly defined material; it is a family of quite different materials that harden by different mechanisms. The three most common plasters are (1) Plaster of Paris, (2) Lime Plaster, and (3) Cement Plaster.(1) Plaster of Paris is CaSO4.H2O, a partially-dehydrated form of Gypsum, which is a hydrated Calcium Sulfate crystal CaSO4.2H2O. When Plaster of Paris is mixed with water, it re-hydrates and turns back into Gypsum, which then hardens into a material similar to mortar or concrete but considerably softer. Water is the material that makes Plaster of Paris harden.(2) Limestone When exposed to atmosphere the Calcium hydroxide turns back to limestone, causing the plaster to set.(3) Cement Plaster is a mixture of Portland Cement powder, sand or other filler, water, and either Plaster of Paris or Lime Plaster. Due to the great variety of minerals that makeup Portland Cement and Cement Plaster, the hardening is a complex process that cannot be ascribed to the action of any one of the ingredients.
1. Find a picture of a dinosaur foot. 2. Draw and cut it out. (on a piece of cardboard). 3. Tape or strap it to your foot. 4. Place foot in the mud. 5. Make some plaster of Paris. 6. Pour the plaster in the hole you made with the foot. 7. Wait for it to set. 8. Take the plaster foot out.
SEE:Sculpture Forum: Can plaster of paris be bakedin oven LINK
If there is water in it you can heat it.
You can have plaster with a pack called fairylites which is a jewellery making set!
It depends on from where you set off.
Cold water makes plaster set slower. Hence, hot water makes it set faster.