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Process to inhibit the reversal of brightness on a substrate containing lignin; process to reduce the reversal of the brightness of bleached pulps containing lignin; process to reduce the reversal of the brightness of pulps containing lignin for use as newsprint; lignocellulosic article resistant to reversal of gloss; paper; pulp; bleached thermomechanical pulp; bleached chemothermomechanical pulp sheet of paper comprising bleached pulps containing lignin; sheet of paper comprising
Process to inhibit the reversal of brightness on a substrate containing lignin; process to reduce the reversal of the brightness of bleached pulps containing lignin; process to reduce the reversal of the brightness of pulps containing lignin for use as newsprint; lignocellulosic article resistant to reversal of gloss; paper; pulp; bleached thermomechanical pulp; bleached chemothermomechanical pulp sheet of paper comprising bleached pulps containing lignin; sheet of paper comprising
A method and article of manufacture thereof is provided for reducing brightness reversion in bleached lignin-containing pulps or newsprint by the treatment of the bleached lignin-containing pulp or newsprint with 2,5-dihydroxydioxane. In one embodiment, calcium carbonate is added to enhance the activity of 2,5-dihydroxydioxane.
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