Terra Alba

SKU: NAP-GROUP-938648
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Usually ships the next business day.
Description

Terra alba is a natural gypsum that can be used as an extender in paint and filler in grounds. Terra alba, calcium sulfate dihydrate, is made by fine grinding and air separating a select, high purity, white gypsum from Italy containing about 20% water of crystallization. Depending upon vapor pressure, relative humidity, loading levels, etc., this water of crystallization, or combined water as it is often called, starts being released as the terra alba is heated above ~50 °C. By about 180 °C, 75% of the combined water has been released. Water is not totally removed until temperatures exceed 400 °C. In formulations processed at room temperature, terra alba can also function as a flame retarding filler.

Properties
Chemical Name: Calcium Sulfate Dihydrate
Chemical Formula: CaSO4 • 2H2O
Specific Gravity: 2.32
Mohs Hardness: 2–3
Loose Bulk Density (lbs./ft.3): 42
Packed Bulk Density (lbs./ft.3): 62
pH (10% Slurry): 7.3
Refractive Index: 1.52
Oil Absorption: 23–25 g oil / 100 g pigment
Reflectance (HunterLab D25-PC2 Colorimeter L,a,b values): 89.1, –0.9, 2.9
Median Particle Size (microns): 12.0
Largest Particle Size (microns): 150
Shipping from
This product is shipped from our supplier's warehouse in Willits, CA, United States
Our guarantee
This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
A 25% handling charge is levied against all authorized returns except those due to our error. Unauthorized returns are subject to a 40% handling charge. Damages & defects must be reported to us within 14 days.
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