As much as we would like it to be, the simple fact is that rollers do not last forever. The roller surface and rubber composition change, they become glazed in appearance and their Shore hardness increases. Contamination can occur in many ways - by using inferior washes, calcium build up from paper, powder spray, water supply, gums and additives from fountain solutions and press sundries. These things do happen - nothing lasts forever but there is a lot you can do to prolong the life of your rollers and achieve greater efficiency in production and cost savings.