Thermal yellowing refers to the dark-keeping increase of blue density in D_min and low/mid density areas of color negative and reversal prints such as that which occurs with album storage of prints. Arrhenius testing is normally used to predict the time to reach a specified amount of yellowing. Recently generated data show that not only the rate of stain but also the maximum amount of stain, is temperature dependent. At 20°C the maximum stain for a typical color negative paper is predicted to be 0.09 Status A blue D_min increase.