Higher strength, yellow tinted, Class III dental plaster that's harder then regular Dentstone KD. Dentstone KD Plus is a formulated hemihydrate plaster (CaSO4.1/2 H2O) produced from naturally occurring gypsum mineral. Used for prosthetics, orthodontics and crown & bridge work, producing a very detailed, low expansion and extra hard model. 9 month shelf life. Water to plaster ratio (by weight) 28%. Initial setting time: 10 minutes. Final setting time: 13 minutes. Linear Expansion: 0.15%. Brinell Hardness: 230MPa. Wet Compressive strength: 33MPa.