superwhite industrial talc powder papermaking talc made in china
Talc powder is a household item, sold globally for use in personal hygiene and cosmetics. Some suspicions
have been raised about the possibility that its use contributes to certain types of diseases, mainly cancers of
the ovaries and lungs although the relationship is still largely a hypothesis and not scientifically proven.
The Occupational Safety and Health Administration and National Institute for Occupational Safety and Health
have set occupational exposure limits to respirable talc dusts at 2 mg/m3 over an eight-hour workday.
One particular issue with commercial use of talc is its frequent co-location in underground deposits with
asbestos ore, which often leads to contamination of powdered talc products with asbestos fibers. Stringent
quality control since 1976 has mostly eliminated this issue, but it remains a continuing hazard requiring
mitigation in the mining and processing of talc. A 2010 US FDA survey failed to find asbestos in a variety of
talc-containing products.
The US Food and Drug Administration (FDA) considers talc (magnesium silicate) to be generally
recognized as safe (GRAS) for use as an anti-caking agent in table salt in concentrations smaller than 2%
PAINT GRADE TALC POWDER
| Technical specification | Paint 60-10 | Paint 60-20 | Paint 60-38 | Paint 58-15 | Paint 57-63 | Paint 35-45 | PTS 6-30 | PTS 8-10 | PTS 8-63 | PTS 8-38 |
| SiO2 %≥ | 60 | 60 | 60 | 58 | 57 | 35 | 35 | 35 | 35 | 35 |
| MgO%≥ | 31 | 31 | 31 | 30 | 30 | 31 | 28 | 28 | 28 | 28 |
| CaO %≤ | 0.45 | 0.45 | 0.45 | 0.80 | 0.80 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 |
| Fe2O3 %≤ | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 |
| Al2O3 %≤ | 0.20 | 0.20 | 0.20 | 0.50 | 0.50 | 0.50 | 6-8 | 8-10 | 8-10 | 8-10 |
| L.O.I. %≤ | 7.00 | 7.00 | 7.00 | 8.00 | 9.00 | 25.00 | 14.00 | 14.00 | 14.00 | 40.00 |
| Oil-absorbed g/100g | 50-55 | 30-38 | 28-35 | 40-50 | 20-25 | 20-25 | 20-25 | 40-50 | ≥50 | ≤25 |
| D98 | 10µm | 22µm | 38µm | 15µm | 63µm | 45µm | 30µm | 10µm | 63µm | 38µm |
NOTE: At present, we can supply thefollowing talc powder which is special for paint industry to choose:
| Paint industry | Talc powder mesh | Whiteness | Remark |
| Latex paint | 325~800mesh | ≥ 92.0 | |
| Polyester paint | 1250mesh | ≥ 94.0 | High transparence |
| Varnish | 325-600mesh | ≥ 92.0-95.0 | High transparence |
| Auto putty | 325-800mesh | ≥ 94.0 | |
| Street indicating paint | 325-600mesh | ≥ 90.0 | |
| Shipping paint | 325-800mesh | ≥ 92.0-95.0 | |
| Building paint | 325-600mesh | ≥ 90.0 | |
| Industry paint | 325-500esh | ≥ 90.0 | |
| Antisepsis paint | 325-800mesh | ≥ 92.0-95.0 | |
| Pigment paint | 200-600mesh | ≥ 90.0 |
Note: Soapstone powder 325-800mesh, whiteness 90-94, overcast rate is better
