The Hull Cell is a miniature plating unit designed to produce cathode deposits on a panel that correlates the characteristics of the plating unit being evaluated. Interpretation of the ????as plated'' cathode panel give rapid information about brightness levels@ irregular plate deposits@ uniformity of deposits@ coverage@ throwing power@ impurities@ and plating bath chemistry. Within the parameters of recommended operating characteristics of a particular plating solution@ the HULL CELL will duplicate what is actually occurring in the plating unit proper. Correlation of the ????as plated'' panel and the HULL CELL SCALE allows rapid@ nondestructive testing of plating solutions for research@ preventative maintenance@ troubleshooting@ and quality control.