Coffee filter papers can be categorized by material, shape, and bleaching method. Materials include wood pulp paper, cotton paper, and bamboo pulp paper, with different materials affecting filtration speed and oil absorption. Shapes mainly include conical, trapezoidal, and corrugated filter papers, requiring matching filter cups of the corresponding shape. Bleaching processes are divided into natural wood-colored and white filter papers. Natural wood-colored filter papers are unbleached, retaining their natural fibrous texture and a slight woody aroma. White filter papers, after bleaching, have a finer texture and very little papery smell. Bleaching processes mainly include enzyme bleaching or oxygen bleaching.
According to a comparative test of cooking paper conducted by the Shanghai Consumer Protection Commission in 2026, all tested coffee filter paper samples met safety standards, with no formaldehyde, fluorescent substances, or other harmful substances detected. White filter paper is as safe and reliable as natural wood-colored filter paper. Consumers can choose filter paper based on their coffee flavor preferences; those who prefer a woody aroma can choose natural wood-colored filter paper, while those seeking the purest coffee flavor are better off choosing white filter paper.
The thickness, weight, fiber structure, and permeability of coffee filter paper affect the flow rate, extraction uniformity, and flavor profile of coffee.
Among these, filter paper thickness is a crucial factor. Thinner filters typically filter faster, while thicker filters may retain more coffee oils, affecting the body and flavor profile.
