This work evaluated the water absorption of glazed porcelain stoneware ceramic tiles using three different methods. Two methods were based on a procedure of boiling in water. specified by standards ISO 10545 and ASTM C373. and the third was the vacuum method proposed by the standard ISO 10545. https://www.roneverhart.com/Mesa-Boogie-Rectifier-4x12-Cabinet-Standard-Straight-p31703/