The present invention relates to a radiation curable ink, wherein the polar portion of the surface tension is equal to or greater than 10%, of the total surface tension, and the total surface tension is between 25 and 31 mN/m, the vapor pressure of the total formulation is equal to or less than 25 mPa at room temperature and the ink includes up to 30% by weight, based on the total ink composition, of unsaturated, hydroxy-functional vinylic and/or methacrylic acid esters.