| 摘要 |
Plaster products can be prepared from calcium sulphate dihydrate by adding to a water slurry of calcium sulphate dihydrate a potassium salt, especially potassium hydrogen-carbonate or potassium tetraborate but, in the first place, potassium sulphate, including a carrier, after which the water slurry is moulded and further worked in known manner to the desired plaster product, especially plaster board or moulds for the production of metal articles or ceramic articles. |
