Contact-angle change of capillary rise ($h_2/h_1=\cos {\theta }_2/\cos {\theta }_1$)

For unchanged fluid, gravity and capillary geometry, equilibrium rise is proportional to the cosine of the contact angle measured through the liquid. Changing from angle $\theta$ to complete wetting therefore multiplies the height by $1/\cos \theta$. If contamination also changes liquid surface tension or density, the contact-angle ratio alone does not fix the new height.