2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106576Here we propose a simple modification of the parameterisation presented in Costa (2005) [Viscosity of high crystal content melts: dependence on solid fraction, Geophys. Res. Lett., 32, 2005] which improves all the main positive features of it, yet at the same time, does not show a plateau region as the solid fraction tends to 1, generally increases the performance of the model, and exactly recovers the classical well established relationships valid for small fractions.6 pages, 2 figure, comments on a previous paper published on Geophys. Res. LettGeophysicsClassical Physicstext