Why does my object lose color when the slot is changed? I have modeled this. When I add another slot in order to make my man more realistic, it loses color and becomes like a normal object.



And my man with new slot added,



Please help so that my object stays in first slot color and uses second slot.
It doesn't exactly "lose color". Paint slots are handled as layers, so if you add a new slot to your model it "spraypaints" the model with whatever colors you have in that slot. Since in your case there are no colors (or a texture, to be more precise) the model appears to have no color at all.