The degree to which paper resists deterioration over time. There is an international norm which applies to woodfree papers. The ISO 9706 international norm Furthermore there is also the German DIN 6738 norm which can be applied to all papers.Furthermore there is also the German DIN 6738 norm which can be applied to all papers.Furthermore there is also the German DIN 6738 norm which can be applied to all papers.defines the conditions for producing permanent” papers. A paper which fulfils these criteria can be stocked for many years under archival conditions (temperate medium and protected from light).
Under the DIN 6738 norm