A&B original artboard B4 canvasA&B original artboard B4 canvas It is particularly compatible with oil and acrylic paints, and is also ideal for expressing the touch of brushes and airbrushes. This art board uses recycled paper made from recycled milk cartons as the core. Recycled milk carton paper is not only environmentally friendly, but is also a strong, elastic material that does not deteriorate easily. B4 (2573641. 5mm)