Molda MC65 is used in the ceramics industry to produce working moulds for the casting of sanitaryware where consistent mould life and porosity are important. This product is particularly suited to daily double casting. Other uses include the production of working moulds for tableware and refractories.
Designed for sanitaryware
Multicasting plaster
High mechnical strength
| Chemical Properties | |
|---|---|
| Chemical Composition | CaSO4.½H2O |
| Chemical Name | Calcium Sulphate Hemihydrate |
| Colour | off-white |
| Minimum gypsum purity % | >92 |
| Mechanical Properties | |
|---|---|
| Dry compressive strength (Mpa) | >12 |
| Flexural Strength (MPa) | >5 |
| Setting Parameters | |
|---|---|
| Final setting time (minutes) | < 40 |
| Initial setting time (minutes) | 15 - 20 |
| Physical Properties | |
|---|---|
| Loose bulk density (kg/m³) | 620 - 720 |
| Particle Size (% weight retained) |
< 6.0% at 63 µm <1% at 90 µm |
| Plaster to Water Ratio | |
|---|---|
| Plaster to water mix ratio (by weight) | 100/65 |
| Plaster to Water Ratio (by weight) | 1.55:1 |
| Water to plaster ratio ( by weight) | 65% |
The recommended plaster to water ratio range is from 1.45:1 to 1.55:1, with a mixing time of approx. 2 to 4 minutes, depending on batch size. 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 sometime previously. Changes to plaster to water ratio will influence product performance, particularly setting time, strength and absorption capability.
Packaging available : 25 kg
Shelf life : 6 months
Packaging available : 1.05 T
Shelf life : 6 months