The second or polishing filtration stage is carried out using a sheet filter. The choice of filter sheet is dependant on a number of factors:
The type of juice to be treated.
The method of processing used before bottling, canning or packing.
The nature of the contaminants to be eliminated. These may be fine, almost colloidal hazes, or of a coarser or less slimy character.
For straight forward polishing filtration, Carlson's XE20H, XE90H or XE200H are ideal. The exact choice will depend on the degree of polish required. Where aseptic or sterile filling is required, Carlson XE675H is ideal due to its excellent sterilising ability.