How do i make a graph on does sunlight fade the paper more in books or magazines?

To create a graph comparing the effect of sunlight on paper in books vs. magazines, you can measure the extent of fading over time using a spectrophotometer or colorimeter. Take regular readings at fixed intervals and plot the data on a graph with time on the x-axis and fading intensity on the y-axis for both books and magazines to visualize and compare the impact of sunlight on paper in each.