In the front/back solid colour print of newsprint papers that have a porous, unstable structure, the colours deviate from one another. In the study, cyan and yellow colours of inks from the process print colours to newsprint paper and the colour variation that is constituted in the front/back solid colour print coinciding one after the other was examined by comparing the actual colour CIE L*a*b* values to the NAA (Newspaper Association of America) Standard Gamut CIE L*a*b* values. Keeping the newsprint paper stable, the application of front/back ground colour test print was performed by the ink in 5 diferent grammages. In order to acquire the L*a*b* values of the ground colour process dyes that are close to standard values with the amount of ink changing, the amount of the optimum film ink to be applied to m(2) on the newsprint paper was also determined. In order to determine the penetration depth of the ink which can not be determined mathematically due to the unstable structure of the newsprint paper, the interface structure of paper-ink was evaluated by being monitored on Stereo Microscope and SEM.