Which factor does NOT affect the time taken for sedimentation of particles?

The time taken for sedimentation of particles is influenced by several factors, one of which is the density of the particle. The greater the density of a particle compared to the fluid in which it is suspended, the faster it will settle. Size is another crucial factor; larger particles typically experience greater gravitational forces, allowing them to settle more quickly than smaller particles. Additionally, the viscosity of the liquid plays a significant role in sedimentation: higher viscosity leads to increased resistance against the motion of the particles, thereby slowing down their settling rate.

The color of the particle, however, does not influence sedimentation time. While color might provide visual information or affect absorption properties in certain contexts, it does not change the physical forces at play during the sedimentation process such as gravity, particle size, density, or liquid viscosity. Therefore, the time taken for sedimentation is unaffected by the color of the particle.