ABS (acrylonitrile butadiene styrene) is strong, flexible and petroleum based. Ideal for 3D prints with the hardness of lego bricks. It’s often the preferred plastic for technical and professional applications. It’s preferably used with heated print beds. ABS is soluble in acetone allowing one to weld parts together with a drop or two, smooth and create high gloss by brushing or dipping full pieces in acetone, or leave a piece overnight in acetone fumes in a closed can.