After the processes of cutting, grinding and polishing are complete, each lens is cleaned with very pure water. De-ionised (DI) water is used for this purpose, as it attracts surface contaminants to it and leaves a spot free finish ready for the tinting and coating processes to be applied. The lenses are often racked and dipped in the agitated DI water in small batches so not much water is required.

The low volume of water required means that source water can be fed directly through the DI resin, to remove all salts and ions, and then through filtration stages for bacteria removal protected by a chemical and sediment removal cartridge. This water is kept running through a re-circulating loop to agitate and remove any debris in this continuous process.

Stages of Filtration & Water Treatment

Ions and Salts Removal

Very pure water is produced using reverse osmosis membranes to separate the majority of salts and ions from the feed water and sending the salts and ions to waste or re-circulation.

Ions and Salts Removal - Fileder Filter Systems

Chlorine and Organics Removal

Helps the taste and odour of the liquid and where present, protects RO membranes from chemical attack.

Chlorine and Organics Removal - Fileder Filter Systems

Bacteria Removal

Reducing the levels of bacteria to log 7

Bacteria Removal - Fileder Filter Systems

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