Molda SN18

Molda SN18 is a formulated hemihydrate plaster used in ceramics to produce working moulds for sanitaryware slip casting in ceramics. This product uses the multicasting technology to bring a high quality and performance plaster stability such as workability time, demoulding time, mechanical properties and absorption capability. This product has a long setting time adapted to large scale mould making.This product can be also used for modelling plasterwork

Benefits

High constant workability, mechanical strength and absorption

Excellent mould surface aspect

Long setting time adapted for large scale mould making

Markets

Ceramics

Applications

Sanitaryware

Technical data

Chemical Properties
Chemical Composition	CaSO₄.1/2H₂O
Chemical Name	Calcium sulphate hemihydrate
Colour	white
Minimum gypsum purity %	91

Setting Parameters
Initial setting time (minutes)	18
Vicat Ring Fluidity (cm)	19

Physical Properties
Particle Size (% weight retained)	0.1% at 200 µm 3% at 100 µm

Plaster to Water Ratio
Plaster to water mix ratio (by weight)	100/71
Plaster to Water Ratio (by weight)	1.40:1
Water to plaster ratio (by weight)	71%

Instructions for use

The recommended plaster to water ratio is between 1.30:1 and 1.50:1, with a mixing time of approx. 2 to 4 minutes, depending on batch size and plaster shop process.Mixing utensils should always be clean and free from set plaster. Use distilled water only. For consistent results, attention must be given to the correct proportioning and mixing of the plaster and water.Add the weighed quantity of plaster slowly into the measured volume of water and allow to soak. Do not mix fresh plaster with that which has been mixed for some time previouslyChanges to plaster to water ratio will influence product performance, particularly setting time and strength and absorption capability.The following graphs help illustrate how varying ratios will affect compressive strength and water absorption.

Packaging and shelf life

Bag

Packaging available : 25 kg

Shelf life : 10

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