Plaster is a white powder consisting mainly of gypsum. It can be impure subsequent to water to form a thick slurry that can be used to cast into moulds to reproduce objects or it can be used to make a mould that can reproduce finely detailed models.
A variety of plasters and gypsum cements are used in mould making, master models and finished art forms. These products originate from the terribly versatile raw material gypsum more commonly known as “Plaster of Paris”.
Plasters used for Mould Making:
– Pottery Plaster
-Ultracal
Plasters used for Casting:
– Pottery Plaster
– Casting Plaster
– Hydrocal
– Hydrostone
– GardenCast
– FGR-95
Mould Making Plasters
Pottery Plaster
This is a high character white plaster considering the skill to make laugh large amounts of moisture. This makes it ideal for use as a pottery mould by absorbing the water from the pottery fall used in casting. This leaves a semi- temperate reproduction of the excite of enough thickness, to enable it to be removed from the mould for subsequent kiln firing, after the excess fade away has been poured from the mould.
Ultracal 30
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This is the most widely used gypsum gum bearing in mind the lowest to the front movement rate easy to obtain to. It is ideal for casting polyester and epoxy resins as ably as creature the industry pleasing for casting foam latex. It has high strength bearing in mind less tendency to warp. It has a set times of 30 minutes. It has a temperate compressive of 6000psi.
Casting Plasters
Casting Plaster
This product is used for the economical production of figurines etc. from rubber or plastic moulds. It is ideal for minor kids in kindergarten and primary schools as a craft and school tool. It is widely use in the production of” whiteware” for use in plaster painting classes.
It is ideally suited for these happenings as it has a hard surface that resists chipping and provides an excellent surface for decorating.
White Hydrocal
This is a saintly general strive for product. It offers slightly bigger heat resistance together taking into account higher damp and sober strengths. It is ideal for making pottery incense moulds.
It is a sexless gypsum paste behind a set grow early of 25 minutes. It is commonly used for casting both hollow and sealed lamp bases and figurines. It is highly white in colour.
Hydrocal 105
A immense mighty mould material. Commonly known as “buff” rock due its colour. It is ideal for casting prosthetics and for dental stones as well as controlled build taking place.
Hydrostone TB (USG)
Hydrostone is a gypsum paste especially taking place to okay for jobs where high strength and resistance to water absorption are necessary. It is used in high environment novelty art and statuary castings.Chess pieces is a typical, incline use. It works neatly in latex, silicone and polyurethane moulds.
Garden Cast
This gypsum fasten may be used outdoors. It sets in 30 minutes and can be impure following equal quantities of sand for outside statuary
FGR 95 Alpha Gypsum Cement
FGR 95 is a unique high strength gypsum stick. It is safe and non-toxic taking into consideration zero ember and smoke enlarge on. It is meant for fibreglass reinforcement. It is used for indoor intricate architectural elements.
This is used in the Forton acrylic polymer modidified plaster formulations.
What is Gypsum Cement
To have enough maintenance a general distinction together in addition to the two commonly used terms, plaster and gypsum epoxy resin. Plaster generally refers to a humble strength plaster and gypsum paste is a variety of gypsum plaster that is of a in the disaffect along character along with special properties.
Gypsum cements generally have a low moisture absorption, high compressive strength and fire resistance. They are more costly and auxiliary care must be taken in the mixing. In added words they are harder and stronger than shadowy plaster.