Gypsum Powder (Premium Super White Finish)

This Thai gypsum powder for silicone mould casting produces white decorative pieces with a smooth surface. Suitable for trays, ornaments, figurines and models, it gives craft makers a clean white finish that can be left plain or coloured.

Compared with our Iranian gypsum, this Thailand origin powder has higher whiteness & tends to produce a harder casting. It is a useful choice when the natural colour matters, especially for unpainted pieces where an ivory or off-white finish would change the appearance.

Benefits & Advantages:

• High whiteness for bright, unpainted decorative pieces
• Harder feeling castings compared with our Iranian gypsum
• Smooth mixture for filling fine mould details
• Mixes with water for straightforward preparation
• Can be tested with compatible plaster pigments & additives

Common Uses: Decorative trays, ornaments, display plates, small vases, figurines, models and other silicone mould projects. Decorative vases and containers need suitable sealing before exposure to water.

Technical Details:

Chemical name: Calcium Sulfate Hemihydrate
Chemical formula: CaSO₄·½H₂O
Type: Alpha-beta hemihydrate blend
Purity: 96-98%
Hardened colour: White
Product origin: Thailand

Mixing & Casting:

1. Measure powder and water by weight. For an initial small trial, use 100 g gypsum with 50 g water, then assess the flow and finished casting before making larger batches. Confirm the supplier’s recommended ratio where available.
2. Place clean water in a clean container. Sprinkle the powder into the water, allow it to soak briefly, then mix gently until smooth. Pour promptly and gently tap the mould to help release trapped air.
3. Adding more water makes the mixture thinner but generally reduces the strength of the dried casting. Setting and complete drying are separate stages; allow the piece to dry fully before painting or sealing.

Storage & Handling: Keep tightly sealed in a dry place, away from moisture. Avoid breathing dust and wear eye protection when mixing.

Frequently Asked Questions:

• Is it whiter than Iranian gypsum? This version has higher whiteness and hardens white, compared with the slightly ivory finish of our Iranian version.
• Can I add colour? Yes. Test compatible plaster pigments in a small batch first.
• How long before I can remove it from the mould? Confirm the demoulding time with a small trial. Water quantity, casting thickness and room conditions affect when it is firm enough to handle.