What is the difference between the different types of mascara brushes?
In my experience, the rubber and comb type of brushes are ment to provide the wearer with volume, so that is the type of brush you would use if you wanted thicker lashes. The soft bristles are for length and volume, the hard bristles are for a great amount of length because they are sturdy and will hold on to your lashes and lengthen each individual lash. The vibrating brushes are ment to give the illusion of more lashes. It catches every single lash, lengthens it and adds volume to the lashes.
