The opaque multiple plates are made of polystyrene (PS) and have outstanding binding characteristics, making them the ideal choice for colorimetric determination. These opaque plates are suitable for fluorescence and luminescence tests, with the black immuno-micro plate usually used for fluorescence experiments. The opaque black surface reduces background interference from auto fluorescence, inter-well interference, and "light scattering", providing improved sensitivity. The white opaque immuno-micro plate is perfect for quantitative determination of bioluminescence or in other luminescence experiments. The immuno-micro plates support fast or continuous luminescence, providing improved measurement sensitivity.