Canadian Philately - The Stamps and Postal History of Canada 1851 to Present by Brixton Chrome

This week I examine the last two physical characteristics of these stamps before I get into the most significant topic of this issue, which of course is the paper varieties. The two characteristics that I discuss this week are the gum found on the stamps, as well as the chalk-surfacing found on the mid values and BABN printings of the $1. The 10c value through $1 landscape designs are found with three different types of chalk surfacing on the paper. Two of them are very distinct and easy to distinguish, while the third looks very similar to the second. The picture below shows the first two of these types: The first printings of the 10c through 50c that were released in 1972 show distinct vertical ribbing on the surface, as shown in the picture. It is thought that the ribbed coating was experimental and intended to see whether or not is was required in order for the ink to properly adhere. The stamp on the bottom shows the smooth chalk surfacing that replaced the rib

This week I cover the aspect of the tagging on these stamps. A lot has been written in the catalogues such as Unitrade over the last 30 years about the tagging on these stamps, that did not used to receive any attention at all: namely the distinction between the OP-2 and OP-4 variations of Ottawa tagging, as well as the 3 mm and 4 mm variations. However, there are other qualities to the tagging that are worthy of attention by the diligent specialist as well. This week's post discusses two of these in depth: 1. The intensity of the tagging, as it appears under normal light, and 2. The different methods that were used to apply the tagging to the stamps. In the case of the low value stamps printed by Canadian Bank Note Company, there are notable differences in the appearance of the tagging on the stamps. Some stamps have tagging that is very light, being barely visible under normal lighting conditions, while others have moderate tagging that is clearly visible. Some stamp

This week, my detailed blog post about this issue looks at the perforations in detail. In addition to the basic differences in measurement, all of which are listed in the catalogues there were some difficulties encountered by the CBN as this was the first time that they had used comb machines to perforate stamps. In addition, there are many instances with the sheets and the plate blocks where you can see double strikes of the comb perforator, which give some clues as to how the panes were laid out in the overall print layout. Some examples of the types of things covered in my detailed post are shown below: Here this block shows selvage at the sides that is fully perforated through, while that at the top and bottom of the sheet shows only a single extension hole. This suggests that the panes were laid out horizontally in the print run. On this pair you can see a clear difference in the appearance of the vertical perforations on the bottom half of the bottom stamp in