ISO 18930-2011 pdf free.Imaging materials – Pictorial colour reflection prints一Methods for evaluating image stability under outdoor conditions. 5.1 Accelerated laboratory weathering tests Controlled laboratory tests are often used to provide standardized data and to benchmark materials. Predicting outdoor image display life from controlled laboratory tests without correlation data for the material in question between the laboratory test and natural outdoor exposure is not recommended. Since the ability of images on digital printing media to withstand colour changes is a function of temperature, humidity, air pollutants, light and diurnal changes of environmental parameters, it is important that print stability be assessed under the conditions appropriate to the end use application. The laboratory procedure described in this test practice is intended to provide a means for predicting the behaviour under actual outdoor exposure. Test results are useful for specification acceptance between producer and user, for quality control, and for research and product developmentt201121). 5.2 Outdoor weathering tests Real-time outdoor exposure is the most reliable method of assessing outdoor image stability, but the actual exposure of a sample depends on the season and the weather, However, it is not as fast as accelerated laboratory tests. The outdoor test procedure described in this International…