View source for Plaster

Plaster is a wetted solid, typically applied to uneven surfaces to smooth them or provide a good surface for paint or other treatment. It can also provide some weatherproofing.
==Production==
===Lime Plaster===
# Gather 2-3 units by mass [[calcium oxide]]
# Gather 1 unity by mass [[sand]]
# Mix well
# Dampen slightly (just enough to make the mixture spreadable)
#: '''Check''': The mixture should heat up
# The mixture is lime plaster. It will "set" over the next few hours-days, depending on thickness of the plaster layer, airflow, and humidity.
===Gypsum Plaster===
Plaster is a partially dehydrated form of [[gypsum]]: {{#Chem: 2CaSO4*H2O }}. Fully dehydrated gypsum, [[calcium sulfate]] can also be used, but the wetting and setting times are much longer.
# Gather [[gypsum]]
# Produce [[calcium sulfate]] "anhydrite" by heating [[gypsum]] over 150&deg;C but below 180&deg;C
#: {{#Chem: CaSO4*2H2O(s) { = 150-180&deg;C } CaSO4(s) + 2H2O(v) }}
# Shortly before usage, mix the anhydrite with water to produce a thick paste.
#: '''Check''': The mixture should heat up
# The mixture is gypsum plaster. It will "set" in 45 minutes or so.

==References==
<references/>
==See Also==
* mortar
[[Category:Materials]]