How to collect paintings and calligraphy

For calligraphy and painting of collection level, it is naturally not mounted. First, it is necessary to install and control the humidity and temperature of the ambient air. At the same time, direct sunlight should be avoided. Then, the daily maintenance after mounting should be more diligent, remove dust, avoid direct sunlight, prevent yellowing and aging, and prevent insects. So it is easier to maintain and collect without installation.