Low blow up ratio means the polymer film will be highly anisotropic. True False

True. The blow-up ratio (BUR) is a measure of the degree of biaxial orientation in a polymer film. A low BUR means that the film has been stretched more in one direction than the other, resulting in anisotropy. Anisotropic films have different properties in different directions. For example, they may be stronger, more rigid, or more permeable in one direction than the other. Therefore, a low blow-up ratio does indeed mean that the polymer film will be highly anisotropic.