where km is a proportionality parameter between the flux and the potential difference, similar to a mass transfer coefficient;
mAm the maximum water mass that can be absorbed by carcass (when t→∞) and mA is the absorbed water mass by carcass (at time t). Substitution of Eq. (3) in Eq. (2) gives the mass balance in the carcass during water immersion as a function of its area and its maximum water absorption capacity: