Changes of acetic acid concentration was observed in display cases in a museum where temperature changes occur depending on the season. It was thought that there was a release of acetic acid from the temporarily-used wooden boxes for display.Changes in the concentration of acetic acid were in good agreement with the predicted values calculated from a one-week average of temperature in display cases when wooden boxes were not in use. Obtaining the difference between the predicted values from the measured values, it was revealed that acetic acid is released from the wooden boxes
