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Saint Gobain Formula RM1099 Pottery Plaster
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Pottery Plaster is used to produce working moulds for the slip casting of sanitaryware, tableware or refractory castings. It can also be used for the production of working moulds for jiggering in Tableware
For slip casting in ceramics
Good abosprtion capablity
Consistent mould life
Plaster to Water Ratio
Plaster to Water Ratio (by weight) 1.47:1
Water to plaster ratio ( by weight) 68%
Chemical Properties
Chemical Composition CaSO4.1/2H2O
Colour white
Setting Parameters
Vicat Ring Fluidity (cm) 19
Initial setting time (minutes) 9
Final setting time (minutes) 13
Linear Expansion (%) 0,26
Mechanical Properties
Brinell Hardness (MPa) 20
Dry compressive strength (Mpa) 16
Wet Compressive strength (Mpa) 7
Pore Volume (%) 44%
Physical Properties
Particle Size (% weight retained)
5% at 150 µm
18% at 90 µm
33% at 63 µm
50% at 32 µm
Loose bulk density (kg/m³) 900
Bulk density (compacted) kg / m³ 1300
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Would be useful to have the option of a smaller quantity.
Alex
United Kingdom
20 May 2024
Helpful?
(11)
(2)
Which of the plaster options would you recommend for making a wedging slab and damp box?
Susan from United Kingdom
I would use the Fine casting plaster, hope this helps.
Scarva Team
Will this plaster (or any other you have) cast details of eg a fingerprint for making slab press moulds or sprigs for putting onto a bowl etc for retaining the detail for over a year or two so I can practice making them into a detailed bowl/pot of the prints for remembering her special day’s’.. My daughter is quickly growing and I want to cast her finger prints with my family’s fingerprints for pressing slabs of semi porcelain slabs into/ onto it /them.
Thanks for your support and feedback,
Eliza
Elizabeth from United Kingdom
Yes you can make an imprint into any clay then pour in any plaster to take a cast of the impression. Hope this helps.
Scarva Team
Which of the plasters you sell would you recommend for making production working moulds for slip casting from a silicone case?
Lottie from United Kingdom
Hi there, we would recommend this Pottery Plaster RM1099.
Scarva Team
Which plaster is best to make a mould for a slab built clay bowl? I'd mix the plaster and water by hand in a plastic bowl then leave it there to set.Once turned out the clay slab would drape over the plaster mould. Thanks.
Kerry from United Kingdom
Hi there, this plaster RM1099 is the way to go.
Scarva Team
If I fill my mold with water before adding plaster, will the resulting plaster body be higher in the mold than the water level was?
Thanks for your help.
Kerry from United Kingdom
We would advise mixing the water and plaster together and then pouring into the mould.
Scarva Team
Is this the best plaster for building a plaster base for reclaiming clay?
Rebecca from United Kingdom
Yes this or our Fine casting plaster is ideal for creating a plaster batt.
Scarva Team
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