Different colored beads appear on the surface of the joint
CAUSES
1. The grout contains a series of chemical additives, aggregates and special grain paints that give the grout color. If there is no good stirring, some grains do not break and if they come up when grouting on the surface, the above phenomenon appears.
2. The addition of reinforcing emulsion to the grout increases the chances of subtle change in the hue of the joint.