We invested quite a bit of time into testing and understanding the filters we provide with our [X] and [XF] drippers. While the dripper itself is important, filters are perhaps as equally as influential on your brew as the beans you use!
It's important to Fellow that our filters not only brew an excellent cup of coffee, but are also safe to use and high quality.
In the 1980s, the paper making industry utilized elemental chlorine to whiten paper. At the time, it wasn’t believed to be harmful to the environment. However, as technology related to testing became more advanced, it was discovered that elemental chlorine can generate dioxins that are potentially harmful to living things and the environment.
Today, however, the bleaching process utilizes chlorine dioxide and oxygen rather than elemental chlorine. This is commonly referred to in the industry as ECF, or elemental chlorine free.
The filters that Fellow uses are tested on a regular basis and guaranteed to contain less than 2 parts/trillion dioxin concentrations. This is actually a lower concentration than what could be found in nature or the environment.
At the bottom of this article, you can also find a PDF from our manufacturer that explains in great detail their process for making the [X] and [XF] filters we use for our drippers.