Fine Casting Plaster

Fine Casting Plaster is an unformulated hemihydrate plaster (CaSO4.1/2H2O) produced from naturally occurring high purity gypsum mineral. It is off-white in colour. It is used for the production of decorative fibrous plasterwork and in general casting applications. It can also be used as a filler or additive within proprietary formulations

Benefits

Typical set time and working properties suitable for production of fibrous plasterwork

Good reproduction of fine detail

Unformulated high purity plaster also suitable for use within proprietary formulations

Markets

Construction Materials

Fibrous and Decorative Plaster

Applications

Fibrous plaster

Floor

Wall

Mechanical Properties
Brinell Hardness (MPa)	20
Dry compressive strength (Mpa)	13
Wet Compressive strength (Mpa)	5

Mechanical Properties

Brinell Hardness (MPa)

Dry compressive strength (Mpa)

Wet Compressive strength (Mpa)

Chemical Properties
Chemical Composition	CaSO₄.1/2H₂O
Chemical Name	Calcium sulphate hemihydrate
Colorometer a* value	0.5
Colorometer b* value	3
Colorometer L* value	92
Colour	off-white

Chemical Properties

Chemical Composition

CaSO₄.1/2H₂O

Chemical Name

Calcium sulphate hemihydrate

Colorometer a* value

0.5

Colorometer b* value

Colorometer L* value

Colour

off-white

Physical Properties
Compacted bulk density (kg/m3)	1200
Loose bulk density (kg/m³)	800
Particle Size (% weight retained)	1 % at 150 µm 8 % at 90 µm 15 % at 63 µm 30 % at 32 µm

Physical Properties

Compacted bulk density (kg/m3)

1200

Loose bulk density (kg/m³)

800

Particle Size (% weight retained)

1 % at 150 µm
8 % at 90 µm
15 % at 63 µm
30 % at 32 µm

Setting Parameters
Final setting time (minutes)	28
Initial setting time (minutes)	21
Linear Expansion (%)	0.2

Setting Parameters

Final setting time (minutes)

Initial setting time (minutes)

Linear Expansion (%)

0.2

Plaster to Water Ratio
Plaster to water mix ratio (by weight)	100/70
Plaster to Water Ratio (by weight)	1.43:1
Water to plaster ratio ( by weight)	70%

Plaster to Water Ratio

Plaster to water mix ratio (by weight)

100/70

Plaster to Water Ratio (by weight)

1.43:1

Water to plaster ratio ( by weight)

70%

Fine Casting Plaster

Benefits

Markets

Applications

Technical data

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