Chrome VI conundrum affects not just tanners
27/08/2010
Recent studies have shown that the chrome III cement manufacturers use extensively can sometimes oxidise to chrome VI during the calcination process, leaving producers who serve the export market with a similar problem faced by their counterparts in leather.
A recent report in the Dunya newspaper suggested that the chrome VI question may be even more frustrating for cement manufacturers because, while tanners use combinations of hundreds of chemicals to make leather, making the conundrum of how the change takes place a complicated one, cement companies cannot find the answer either, even though they use only five or six ingredients.
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