White vinyl sealing film may be applied to either the top or bottom of the plate to optimize reading results. The light-reflective properties maximize sensitivity of bioluminescence and chemiluminscence assays. White films may also be used as a backing matrix for microscopy of punchout samples from filter plates. Dimensions are 76.2 by 116 mm; there are no end tabs. Recommended temperature range: -40°C to +80°C.