... industry are seeking for lower cost material to substitute titanium dioxide and rutile etc, sepiolite, white clay, pyrophyllite etc siliceous ... expansion rate ( pyrophyllite, 70.5%; sepiolite, 5.2%; Titanium dioxide, 32.6%; sericite mica, 4.3%), to reduce welding ... increase the coatings smooth and adhesion, ideal substitute for titanium dioxide and reduce the production cost. TECHNICAL DOC--HOW ...