Below is a list of Paper Cores manufacturers from Oakland, California. Paper cores are strong cardboard tubes or cylinders which are used in fabric, adhesive, electrical, paper product and converting industries as a sturdy base around which to wind materials for storage or distribution. Depending on the intended use of the tubes, paper cores can be made from heavy-duty thick cardboard for industries such as fabric and electrical, whereas for toilet paper or paper towels, the cores can be made from thinner, less durable cardboard or paper.