Strip coagulation in tanks is more economical than mass coagulation as the strip will go easily through a macerator without being cut up, rollers can be set fairly close for the first roll, and once through the macerator brings the rubber to a stage where the crêper and smooth finisher can deal with it. The macerator and crêper should be hard chilled rollers with uneven speeds, the number of teeth in the cogs being 21 for the front roller and 18 for the back one.