Mixed Ester Membrane Filters - Black gridded Membrane w/Pad - 7153-104

Whatman™ black mixed ester membranes are composed of cellulose acetate (20%) and cellulose nitrate (80%). These membranes are characterized by a smoother and more uniform surface than pure nitrocellulose filters. Also, the color contrast provided by the filter surface facilitates particle detection and minimizes eye fatigue. Compared to pure nitrocellulose filters, mixed ester membranes have a smoother and more uniform surface as well as offer color contrasting, making it easier to detect particles. In microbiological colony counting procedures, the color contrast between the surface and the colonies facilitates the counting process. Whatman black mixed ester membranes are gridded to assist in manual counting procedures. Black membranes provide contrast between residue or cell colors and the filter without having to counterstain the membrane.