THIS WEEK’S FIELD TIP
Dry line products used for marking lines on ballfields usually come from one of two types of stone, limestone or marble. Limestone is a sedimentary rock while marble is a metamorphic rock that is formed when heat and pressure are exerted on a limestone deposit, such as during the formation of mountains, and the limestone transforms into marble.
Both of these stone products are high in calcium carbonate, which helps to give these materials a white or off-white color. Dry line marking material that is produced from sedimentary limestone is generally a softer material and flows more slowly through a dry line chalker. Limestone-based chalk is produced in many areas all across the United States which tends to make it more widely available. Conversely, marble is a harder, purer marking material that tends to flow faster in a chalker. Marble chalk is produced in more mountainous areas of the US, primarily in northern Georgia and western Colorado… Read the rest of Paul Zwaska’s article at Ballfields.com: All Field Marking Chalks Are Not Created Equal
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