- None of the materials in Renaissance oil paintings other than the paint are vulnerable enough to relatively wide fluctuations in temperature and humidity to cause damage to the paintings.
找assumption 本文结论表示因为old oil paint is unaffected by wide fluctuations in temperature and humidity. Therefore, museums could relax their standards就必 须要有d这个assumption也就是前提必须是例如paper…etc这类的material不会易受 temperature and humidity的影响 | 
