A mass transfer imaging element comprising a substrate having a surface colourant layer containing a pigment to be imagewise transferred, wherein said colourant layer comprises a fluorocarbon additive in an amount to provide a fluorocarbon additive:pigment weight ratio of at least 1:20. The medical advice is provided to the general public over a telephone network. The hold request may be denied or accepted, and may define the duration a modem will hold before hanging up.