Gypsum Products Gypsum Products Gypsum is the name for products that come from stone. The dental office uses two types of gypsum. One type is called dental stone , and the other is called dental plaster or laboratory plaster . Even though their source is the same, they are processed differently and so have different properties.
Dental stone is the hardest and is used for dies or projects that require more strength.
Manufacturers will vary this ratio slightly, so it is important to read the directions of the particular product at your facility. This is especially true when the office changes manufacturers. The manufacturer will usually add the color yellow or buff to the dental stone, so it is easy to distinguish it from dental plaster. Dental plaster or laboratory plaster is softer and is used for study models. Dental plaster or laboratory plaster has a mix ratio of 60ml of water to 100g of plaster.