What is the primary use of kosher salt?

The primary use of kosher salt is for draining blood from meat, which is a crucial step in the kosher food preparation process. This practice stems from Jewish dietary laws that prohibit the consumption of blood, as outlined in the Torah. Kosher salt is particularly effective for this purpose due to its large grain size, which allows it to draw out moisture effectively when rubbed onto the surface of meat.

While kosher salt can also be used for seasoning and preservation, its name originates from its traditional use in the koshering process rather than these other applications. This function distinguishes it from regular table salt, as kosher salt's texture facilitates the blood-draining process, making it an essential ingredient in kosher meat preparation.