CP7 researcher Radovan Slavuj had a successful pre-defence on September 18, 2014 at Gjøvik. There, all the work that has been done around printer modeling and halftoning was presented and future directions were suggested and discussed. The Pre-Defense had concept of a real defense with two opponents, supervisors and audience who were free to ask questions. Title “Spectral Colour Reproduction with Multichannel printers” represent work that has been done until now, but do not necessarily absorbs all material from final thesis. Overall, the timing to conduct Pre-Defence was right as there is one more year left for Radovan to make the thesis more unique and that significant contribution could be made in the field.