All marking chalk is not created equal. The color and the amount of the pigment determines the vividness and permanence of the line. The pictures below give a basic idea of how marking chalk works and why Keson chalk is the best marking chalk in the world. It sticks to your line until you decide you want it to stick to something else. Over the years, we’ve fine tuned our formulas to produce chalk that performs with consistent excellence, batch after batch.

We’ve engineered a range of colors with two basic variations of intensity: ProChalk Plus, for lines that hit and stick for a long, long time; and standard ProChalk for your basic chalk line needs. Glo-Orange and Glo-Lime are highly visible versions of ProChalk that will wear or wash away naturally. ProChalk Ultimate is chalk dye, almost 100% pigment!