This Liquid White Base Coat from Bob Ross is one of three other base coats necessary for wet-on-wet techniques made so famous by Bob Ross on his Joy of Painting show that became a cultural phenomenon. These base coats of liquid white, black or clear help to properly blend and mix the paints straight onto the canvas instead of working it yourself on the palette which can be very time consuming. This liquid white, black and clear is also helpful as a way to thin your colours when applying them over thicker paints. A thin paint sticking to a thick paint is the core idea behind the entire wet-on-wet technique made so famous by Bob Ross. - Brand: Bob Ross - Colour: White - Size: 500ml - Helps to blend the colours right onto the canvas instead of on a palette - Great at thinning out colours when applying them over thicker paints