Retarder medium is used to slow the drying time of acrylic colors, thereby allowing better mixing options for smooth blending effects of colors. Gel medium helps to thicken the acrylic colors thereby retaining brush strokes. Adding gel medium is a way to increase the paint’s transparency without compromising the consistency and adhesive properties. Gel medium has a unique effect on the consistency, finish, and adhesive. Shades in the pack – prussian blue, cobalt blue hue, viridian hue, permanent yellow deep, scarlet lake, titanium white, black, lemon yellow, crimson lake, burnt sienna, yellow ochre, sap green, raw sienna, burnt umber, silver, permanent orange, phthalo turquoise, deep magenta.