Sirs, Cement Experts,

Please tell me how is possible, a good clinker (C3S = 60; FL < 0.5; LSF = 95 - 96) and the clinker color is brown inside.

What you think, from where is this color and if the color affect the cement quality.

I know that the color not affect cement quality, but affect the sells, everybody need black cement

Many thanks and

Regards,

Dimitry