There is provided by this invention an apparatus and method for controlling a dc magnetron plasma processing system that automatically adjusts the control signal to the power supply based upon the dynamic impedance of the load to control the output power to the plasma. The complex programmable logic circuit connects with the bus connection interface and comprises at least: a card information structural memory, am address decoder, a power control register, and a storage card coupling for connecting a storage card. The change request and the hash are stored in a lockable non-volatile buffer which, once locked, requires a system reset to access. The compositions may be used for lengthening andor volumizing keratin fibers, for example, eyelashes.