KromaPhase Core-Shell Scharlau columns are manufactured superficially porous particles (SPPs). These particles are made of a solid, nonporous, impermeable silica centre surrounded by a porous shell layer with similar properties to those of fully porous materials. rScharlab's Kromaphase Core-Shell Technology results in less band broadening and results in chromatographic separations with enhanced resolution, higher sensitivity and improved peak capacities. rEach column is tested after manufacture for efficiency, capacity, selectivity and peak symmetry. The test results are shown in the Test Chromatogram, which is attached with each column.rScharlau KromaPhase Core-Shell columns offer a wide range of possibilities. The portfolio includes more than 200 columns and pre-columns with different silica functionalisation, internal diameter and dimensions.