We don't use chlorine for whitening of the filters.
For the paper filters, we are transitioning from an Elemental Chlorine Free (ECF) process to a naturally-white (non-whitened) filter.
The coffee pre-filled filters have all been transitioned and are just formed from naturally white abaca fiber (mainly) and wood pulp.
The empty filters will transition over the next few months (and are currently ECF whitened). We are constantly striving to improve our products!
