Rmrk1, Rmr1, Rak1, A1 are surface texture parameters in the Rk Parameter family. Like Rk, Rpk, and Rvk, these parameters are derived from the material ratio curve (bearing ratio curve). They let us analyze the peaks of a surface texture independently from the core and valley regions, describing the material ratio and area of hills.
Learn more about surface texture parameters in our Texture Parameter Video library/