Acrylonitrile butadiene styrene (ABS) can be solvent welded using a variety of solvents, but the most commonly used solvent is acetone. Acetone is a fast-acting solvent that works well on ABS because it can dissolve the plastic and create a strong bond between the two pieces. However, it is important to note that acetone can also dissolve other types of plastic, so it should only be used on ABS and not on other types of plastic. It is also important to use acetone in a well-ventilated area and avoid contact with skin or eyes as it can be harmful. Other solvents that can be used for welding ABS include methylene chloride and tetrahydrofuran (THF), but these solvents are more hazardous and require more precautions. It is always recommended to follow the manufacturer’s guidelines for welding ABS and to use the appropriate safety equipment when handling solvents.