An instrument for determining the proportional amounts of components needed to achieve a proper grout consistency. For example, it specifies the quantities of water and dry grout powder necessary to create a mixture suitable for filling tile joints.
Correct proportioning is essential for durable and effective grout. Deviation from recommended amounts can result in weakened grout susceptible to cracking, staining, or premature failure. Throughout history, craftspeople relied on experience and rules of thumb, but these tools offer increased precision and reduced material waste.