  We study the critical Casimir interaction between two spherical colloids
immersed in a binary liquid mixture close to its critical demixing point. The
surface of each colloid prefers one species of the mixture with the exception
of a circular patch of arbitrary size, where the other species is preferred.
For such objects we calculate, within the Derjaguin approximation, the scaling
function describing the critical Casimir potential, and we use it to derive the
scaling functions for all components of the forces and torques acting on both
colloids. The results are compared with available experimental data. Moreover,
the general relation between the scaling function for the potential and the
scaling functions for the force and the torque is derived.
