Colour
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2025-08-15 06:51
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Colour
But despite all these cries of alarm, five years on from the original study no further testing into the safety of Titanium Dioxide in our food supply
This precipitate is not suitable for a pigment until it is filtered, dried, crushed, heated to a high temperature and quenched in cold water. The second heating in a muffle furnace at 725 °C produces crystals of the right optical size.