A made-from-scratch mix requires contractors to have a mix recipe. Jeff Girard, president of The Concrete Countertop Institute, teaches his students to make an aggregate-based mix and sand-based mix.

The concrete mix must have just the right amount of water, it must be cured in an environment that is neither too hot nor too cold and it must be reinforced. But many countertop fabricators ...

With concrete countertops and other forms of creative concrete, often the forming techniques, mix design ... a color matched grout (using the same recipe as in the Pressed look).