surfactant added to the pulp mix for the interior layer of the tissue is between 1 4 and 1 90 parts by weight and preferably about 1 8 parts by weight in particular when the ionic surfactant is a quaternary amine debonder reducing the concentration relative to the amount of non ionic surfactant can lead to an improved tissue excess debonder particularly when introduced as a wet end additive can weaken the tissue while an insufficient amount of debonder may not provide the tissue with sufficient flexibility because of the migration of the non ionic surfactant to the exterior layers of the tissue the ratio of ionic surfactant to non ionic surfactant in the core layer may be significantly lower in the actual tissue compared to the pulp mix in an exemplary embodiment a dry strength additive is added to the thick stock mix for at least one of the exterior layers the dry strength additive may be for example amphoteric starch added in a range of about 1 to 40 kg ton in another exemplary embodiment a wet strength additive is added to the thick stock mix for at least one of the exterior layers the wet strength additive may be for example glyoxalated polyacrylamide commonly known as gpam added in a range of about 0 25 to 5 kg ton in a further exemplary embodiment both a dry strength additive preferably amphoteric starch and a wet strength additive preferably gpam are added to one of the exterior layers without being bound by theory it is believed that the combination of both amphoteric starch and gpam in a single layer when added as wet end additives provides a synergistic effect with regard to strength of the finished tissue.