Rolls of raw paper are unwound and separately led to sloped feed roller devices. Paper then is directed into the treating bath. The treating bath contains a solution of heated zinc chloride and is equipped with a dip roller which combines the immersed plies of paper. After leaving the treatment bath the paper passes through a pair of sequeeze rollers which remove the excess zinc chloride solution. After the rollers the impregnated paper then passes over two heated treatment cylinders, followed by airation during which uninform parchmentizing is achieved. After the aeration the zinc chloride solution must lead out completely. Removal of the zinc chloride takes place in a series of washing tanks. State of the art driving devices guarantee a tension free transportation of the fibre through the tanks. Zinc chloride which has been washed out during this process is separated and recycled in a different production unit to yield new parchmentizing solution.
The wet fibre is being dried afterwards. It is being transferred to the drying section where it first runs through a drying oven before it passes over a series of heated cylinders. The occurring drying temperatures are being selected carefully in order to ensure gentle and uniform drying over the full production width of the fibre. Number and configuration of the drying cylinders are responsible for the extraordinary high quality of DYNOS® Vulcanized Fibre products. Immediately after drying, the Vulcanized Fibre runs through a calander and fibre then is wound on a winding unit.