A. Main features:

1. Physical property: Fine white powder, odourless. Contains no toxic, radioactive elements; not flammable or combustible; alkalescent.

2. Set time: They can retard the initial set time of building gypsum to more than 100 minutes. The set time extends along with their adding quantity, with the optimum adding quantity being 0.1 to 0.3%.

3. PH value: (20°C, solution 20%) the pH value is 7 to 9.

4. These products has good applicability, which can be used in natural gypsum and chemical gypsums.

5. Compatibility: They contains no additives such as chlorine salts and water-retening agents, so they have good compatibility.

6. Attention shall be paid to moisture proofing to prevent agglomeration.

B. Method of application:

1. In use, mix the set retarder with a selected adding quantity with gypsum powder; or dissolve  the set retarder completely in water before adding gypsum powder.

2. Because the qualities of gypsum powder produced in different plates are different, and that the standards and thicknesses used are different, the adding quantities and effects of these products are different. Do proportioning test carefully before using these products in order to determine the optimum adding quantity.

3. Our company can adjust the formula of set retarders in accordance with the gypsum powders from different places, to satisfy all customers.

C. Application scope and adding quantity:

1. The adding quantity of plastering gypsum, adhesion gypsum, caulking gypsum and gypsum putty: 0.1 to 0.3%;

2. The adding quantity of gypsum building blocks, and gypsum powder for gypsum boards: 0.05 to 0.15%.

D. Package: Double plastic sealing package (25 kg/bag)