Totally chlorine free bleaching. Hydrogen peroxide breaks down into water and oxygen, leaving no chlorinated organic compounds in the fiber. This is the TCF route rather than the ECF route that uses chlorine dioxide.
Virgin fiber with known history. Recycled fiber carries whatever was in the paper it came from, which is why many markets restrict it for direct food contact. Virgin fiber has a traceable chemistry.
White base for accurate color. Pigment applied over a white base reproduces predictably, where the same pigment over gray-brown recycled fiber shifts with every batch of incoming fiber.
Smooth surface for Type 3 forming. This material justifies cure-in-the-mold tooling, where heated molds press and densify the part to a smooth, well-defined, almost plastic-like finish.
Premium appearance without coating. White reads as finished and clinical, which suits cosmetics, medical, and premium retail without adding any surface layer.
Compostable on the same basis as unbleached. Peroxide bleaching removes lignin and brightens cellulose. It does not introduce anything that interferes with breakdown.
Bleaching is a lignin removal and brightening process, not a coating. Residual lignin is what makes unbleached kraft brown, and peroxide oxidizes the chromophores responsible for that color. Some fiber strength is lost in the process, which is the main trade: a bleached part is marginally weaker than the same fiber unbleached, at the same wall thickness.
That trade is worth making whenever appearance or compliance is the driver, and not worth making for a transit insert nobody sees.