Bleached pulp is the material to specify when the part has to be white, has to touch food, or has to look like a finished product rather than packaging. We bleach with hydrogen peroxide rather than chlorine, which is a totally chlorine free route that leaves no chlorinated organic residue in the fiber or the effluent. The result is a clean white virgin fiber with controlled chemistry, which is what food contact compliance actually requires.
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.
Direct food contact. Where the part touches food rather than sitting outside a sealed product, bleached virgin fiber is the specification that clears regulatory review most easily in most markets. Trays for produce, confectionery inserts, and food service items all sit here.
Cosmetics and personal care. A white insert inside a gift set or a skincare box reads as part of the product. Brands moving away from vacuum-formed plastic trays usually land here, because it is the only fiber that matches the finish expectation.
Medical and pharmaceutical. White is the convention in this sector, and virgin fiber with controlled chemistry is the baseline requirement. Single-use hospital disposables are among the oldest molded pulp applications.
Any part being pigmented to a precise shade. The white base removes the variability that makes color matching difficult on recycled fiber. If a brand color has to reproduce exactly across years of reorders, starting from bleached fiber is the most reliable route. See colored pulp for how that process works.
Where bleached pulp is the wrong call: protective transit packaging where appearance is irrelevant, and any cost-driven volume part. For those, recycled paper pulp or straw fiber deliver the function at a fraction of the material cost.
Buyers who want a pale finish without a bleaching stage should look at bamboo fiber, which forms naturally paler than wood and considerably paler than recycled fiber.
Fibra branqueada ecologicamente correta
O papel kraft compostável é a fibra mais resistente que produzimos. Fabricado a partir de matéria-prima virgem
A polpa colorida não é uma fibra separada. Trata-se de qualquer uma das nossas
A polpa branqueada é o material a ser especificado quando a peça precisa
O termo “fibra vegetal natural” abrange as fontes de celulose não derivadas da madeira que incorporamos à nossa mistura, fora da
O papel ondulado, como material de polpa moldada, refere-se a caixas de papelão recicladas que foram transformadas em polpa novamente
A fibra de palha é produzida a partir dos caules que sobram após a colheita dos grãos, material
Os produtos de celulose moldada substituem o plástico e a espuma, oferecendo opções recicláveis e biodegradáveis. Formas personalizadas, cores e superfícies ecologicamente corretas estão disponíveis. Oferecemos embalagens econômicas e sustentáveis com prototipagem e fabricação próprias.
As bandejas de polpa de papel para prensagem a seco, fabricadas com materiais reciclados 100%, oferecem uma alternativa econômica e ecologicamente correta ao plástico. Elas oferecem amortecimento, resistência à temperatura e capacidade de empilhamento, economizando até 20% de espaço.
A Bonitopak oferece celulose moldada em seis cores, incluindo branco, natural e preto, com precisão de cor 95%. Métodos ecologicamente corretos garantem um branqueamento seguro. O natural e o branco são melhores para alimentos; os outros são adequados para embalagens de bandejas.
By Leo Chan, Senior Packaging Consultant, BonitoPak. Last updated: November 2026.A 12 egg carton holds
By Leo Chan, Senior Packaging Consultant, BonitoPak. Last updated: November 2026.Quail egg cartons are molded
By Leo Chan, Senior Packaging Consultant, BonitoPak. Last updated: November 2026.A molded pulp cup carrier
