I have again reviewed that in no place i.e whether it be on the ad of News paper, Ad on wevsite of SPSC or Application form. In no place the bank challan of coloured or photocopied is said to be mentioned. SPSC hasade many confusions. What I feel whether we send colour printed challan or its photocopy, all is fine. However, colourful printed is better but not mandatory what I deduce. sir incounternable can throw light on this issue in better way what needs to be done in this regards.