The Shade Variations on the 1972-1978 Caricature Issue of Canada
This week's detailed post about this issue explores a topic that has surprisingly received little to no attention in even the most specialized catalogues: the shade varieties. It is surprising because all but two of the stamps in this series exhibit at least two and up to 4 or 5 different subtle variations in the shades of the inks that were used to print the stamps. What makes the shade variations especially interesting to me, is the fact that many are associated only with certain printings, and certain time periods within the life of the issue, and consequently, it does not appear that they are merely just random varieties that have no significance. In terms of colours, the orange inks seem to exhibit the most variation, followed by the blue inks. However, as I said above, all but two of the denominations exhibit at least 2 variations in shade, with the 4c Mackenzie King and the $2 Quebec being the only stamps for which I was not able to find any significant variation in the s...