A method of forming a radiation imageable coating includes preparing a radiation-curable polymer matrix including an acidic activator species, forming a leuco-dye phase, distributing the leuco-dye phase in the polymer matrix, evaluating a power level of an targeted radiation source, and if the power level of the targeted radiation source is less than approximately 1 watt/cm2, sensitizing the radiation imageable coating with a sensitizing agent corresponding to the targeted radiation source.