Amsterdam acrylic mediums
Acrylic retarder delays the drying of acrylic paint. You simply mix it into the paint before applying it to your board or canvas.
Amsterdam acrylic remover is used to remove dried paint from your brushes.
Slow drying medium will slow the drying time of acrylic paint. You can put as much of the slow drying medium into the paint as you want.
Glazing mediums increase the flow and transparency of the glazing layer in your acrylic paint.