Supraduro TW 59
Supraduro TW 59 is a hemihydrate formulated plaster used in ceramics to produce working moulds for jiggering application of tableware.
Benefits
High mechanical properties
Very fine surface details
Controlled expansion
Technical data
| Chemical Properties | |
|---|---|
| Chemical Composition | CaSO4.½H2O |
| Chemical Name | Calcium Sulphate Hemihydrate |
| Colour | off-white |
| Minimum gypsum purity % | >92 |
| Mechanical Properties | |
|---|---|
| Dry Compressive Strength (MPa) | >15 |
| Flexural Strength (MPa) | >6 |
| Setting Parameters | |
|---|---|
| Final setting time (minutes) | < 30 |
| Initial setting time (minutes) | 7 - 12 |
| Linear Expansion (%) | < 0.2% |
| Vicat Ring Fluidity (cm) | 18 - 24 |
| Physical Properties | |
|---|---|
| Loose bulk density (kg/m³) | 720 - 820 |
| Particle Size (% weight retained) |
< 6.0% at 63 µm < 1.0% at 90 µm |
| Plaster to Water Ratio | |
|---|---|
| Plaster to water mix ratio (by weight) | 100/59 |
| Plaster to Water Ratio (by weight) | 1.70:1 |
| Water to plaster ratio ( by weight) | 59% |
Instructions for use
The recommended plaster to water ratio is 1.70:1. This product can be used between 1.60:1 and 1.80:1, with a mixing time of approx. 2 to 4 minutes, depending on batch size and plaster shop process. Water and plaster must be measured carefully to ensure constant performances. The precise consistency to use will need to be adjusted to suit the individual application. Changes to plaster to water ratio will influence product performance particularly setting time, strength and permeability
Packaging and shelf life
Bag
Packaging available : 25 kg
Shelf life : 6 months
Bulk Bag
Packaging available : 1.05 T
Shelf life : 6 months