Ceramic ink pads is a revolutionary new concept for recording fingerprints. 2-1/2" x 4 Ceramic Inserted Fingerprint Pad features a specially designed microporous membrane that features a pore size of 7 to 10 microns affording a higher degree of detail in the fingerprint impression. It produces thousands of rolled and plain impressions.The benefits to the fingerprint technician become obvious when using the Flawless system. The ink pad provides, through capillary action, just the right amount of ink on its surface, not too much and not too little. Less pressure is needed when fingers are rolled across the pads surface so less distortion is transmitted to the resulting impressions. Ceramic ink pads are your solution to faulty prints!