There are two options for coffee filter paper, one is unbleached yellow-brown filter paper, and the other is bleached white filter paper. The primary color filter paper has a heavy wood smell. Its smell will affect the brewed coffee, so it will pass through Bleached white filter paper.
The traditional bleaching method uses chlorine. Chlorine is highly toxic. Although it has been found that no toxic substances are left in the production process, it is not dangerous to brew coffee with bleaching filter paper; however, the wastewater generated by chlorine in the process will still pollute the environment.
MOLA coffee filter paper bleaching uses the acid bleaching paper making process, which is still harmless to the human body, but greatly reduces the harm to the environment.