Hand-brewed coffee | how to choose bleached filter paper toxic belt you know how to make bleached filter paper

In the past, Melitta Bentz wanted to get rid of the coffee grounds in the cup. As an innovative woman, she tried different filtering methods and found that paper works best. In 1908, she poured the first patent for filter paper and filter paper, and since then she has created many different variants.

Materials

There are many manufacturers, brands and versions of coffee filter paper. Similarly, the specialties of each type of paper vary greatly. Some papers have special holes to optimize flow and then optimize extraction. Like Chemex paper, some are thicker, making the wine noticeably clear, bright and light. Then comes the big question: bleached or unbleached?

Coffee lovers often say that they do not want to use bleaching paper because bleaching is bad for the environment. This may have been the case in the past, but now it is not all.

Chlorine-based treatment

1. Bleaching is done by elemental chlorine. The key word here is "element" because this form of chlorine is a bad person. The elemental chlorine will combine with the organic matter in the sewage to form toxic organochlorine compounds.

two。 This used to be the main bleaching method, but this method is used to process some of the cheapest filter paper to keep the final product price low.

3. Other flavors or smells of coffee may be released. Rinse paper is needed before use.

Oxygen method

1. Completely chlorine-free process (TCF). Bleaching is done by using oxygen-based free radicals.

two。 It will not release any other taste or smell, but it is best to rinse the filter paper before use.

3. In addition to all the current filter paper, it has also been biologically purified.

Method based on chlorine dioxide

1. Elemental chlorine free method (ECF). Chloroprene is not used in the form of chemical elements, but in the form of compounds (chlorine dioxide). This is to prevent chlorine from producing any toxic organic compounds.

two。 It will not release any other taste or smell, but it is best to rinse the filter paper before use.

3. In addition to bleaching, biological purification.

Unbleached

1. A slight odor and / or smell. Be sure to rinse the paper before use.

two。 Because the whole manufacturing process is lighter, unbleached paper is more environmentally friendly. The disadvantage of lighter processing is that some wood fibers are usually left in the final product. This may cause paper holes to be clogged during brewing. This is why it is important to rinse unbleached filter paper before use.