unbleached coffee filters. What is the point?

A company that provided me with 12-cup coffee filter basket has recently end their "unbleached" online. T anyone know of any alternative to the "Natural Brew" unbleached coffee filters 12-cup? I looked everywhere and the only people who are selling old stock of natural beers … sigh. In addition, how "bleach" is actually used in the filters regularly? Or is "milled" just a slogan invented by "Natural Brew" company?

Most regular stores carry some form of unbleached filters. However, a better option, even becomes a permanent coffee filter. http://fantes.com/coffee_filters.htm http://baldmountaincoffee.com/page/BMCC/CTGY/Swissgold_Coffee_Filters_Basket gold #

Vietnamese Coffee Filter, A Minimalist ‘Lumiere’ film about a Maximalist cup of coffee