(This file presents functions for the calculation of two slurry correction factors applied to the deposition velocity: – Mc Elvain and Cave correction factor and Durand correction factor. (This two function are a digitalization of the curves and therefore no equation is used). – Also is presented a function for Weir – HR factor for estimating the head and the efficiency of slurries, based on the values for water (Note. Weir, in later publications, is proposing a “HR-value” determination method that also requires the impeller diameter as input data. Rev. 31.01.2014)