This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not be construed as guaranteeing specific properties or suitability for a particular application
LITHOPONE 30% DS is an organically coated white pigment based on co-precipitated zinc sulfide (ZnS) and barium sulfate (BaSO4). It is free from inorganic surface treatment, helping reduce volatiles and lacing in plastic applications. The product is chemically resistant within the pH range of 4 to 12 and offers excellent dispersibility.
The pigment has a refractive index of 1.86, high brightness, and a neutral hue. Its low absorption in the near UV range enhances compatibility with optical brighteners compared to other inorganic white pigments.
Property | Value |
---|---|
ZnS content | Approx. 30% |
BaSO4 content | Approx. 70% |
Organic treatment | Present |
Brightness L* (powder) | Approx. 98 |
Average particle size | Bimodal: Ca. 0.3µm (ZnS), Ca. 1µm (BaSO4) |
45 µm sieve residue | ≤0.004% |
pH | Approx. 8 |
Specific gravity | Approx. 4.3 g/cm3 |
Specific surface area | < 5 m2/g |
Hardness (Mohs) | 3 |
Relative lightening power (PVC = 17%) | Approx. 125 |
C.A.S. Numbers | ZnS: 1314-98-3, BaSO4: 7727-43-7 |
As with all fine powders, handling zinc sulfide pigments can generate airborne dust. Good industrial hygiene practices should be observed to avoid dust generation and inhalation. For more information, refer to the material safety data sheet.
The product should be stored unstacked in dry and closed rooms at normal temperature and humidity. To achieve the best results, use within 12 months from the delivery date.