Barium sulfate also used in brake linings

Except in the building technology as well as in the paint and coatings industry barium sulfate is also used in automotive industry - for use in brake and clutch linings, which may contain up to 40 percent barium sulfate according to the application.

Grandma’s who sometimes softly muttering to herself while walking around, is completely normal. Everyone knows that, being in lucky situation, maintaining regular contact with older persons. Incidentally, it is also not outrageous when people take time "talking to himself". Experts see soliloquy rather than an "useful tool for thinking", which we should use more often. However, it seems now a modern version of "monologue" to give at fairs, railway stations or in super markets.