SPI-Pore Black Polycarbonate Track Etch Membrane Filters

Common uses for the "black" membrane filters include all previously mentioned applications for polycarbonate membrane filters except in this case, the samples are going to be viewed with some type of fluorescence-type microscopy, such as epifluorescence, and in that kind of situation, the desired background is to be pitch black. The filters are actually gray in color but appear to be black under reflected light.