Releasable closure for bags and containers

A packaging method which provides for end use resealing of a package made of a substrate material comprising the steps of positioning on a release liner adjoining strata of pressure-sensitive adhesive, a first outermost of said strata having a relatively high adhesion to said substrate material and a second outermost of said strata having a relatively low adhesion to said substrate material, transferring said adjoining strata of adhesive onto a first portion of said substrate material of said package with said first outermost stratum permanently contacting said substrate to establish a permanent fastener joint at the interface between said first portion of said substrate material and the permanently adhered surface of said first outermost stratum, closing or reclosing said package to initially establish a reseal joint at an interface between some other portion of said substrate material of said package and the reseal surface of said second outermost stratum, gradually and progressively mixing said strata by reopening and reclosing said package at the point of end use to induce relative and intermixing flow between said strata and (1) drive some of the adhesive of another stratum or strata toward said reseal surface of said second outermost stratum to compensate for the adverse effect of contamination on reseal adhesion at said surface and (2) combine the strata to a relatively deep thickness of mixing to increase the adsorption of contaminants, said relative and intermixing flow stopping short of the boundary layer at the permanently adhered surface of said first outermost stratum whereby initial adhesive strength is maintained at the permanent fastener joint.