Exploring all topics to do with the wonderful postage and revenue stamps issued by Canada since 1851, and the history of their use. Comments are welcome on all posts. Our mission is to spread all relevant knowledge connected with Canadian stamps and postal history.
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Updated - The Plate Blocks of the Karsh and Heritage Definitives - 1953-1967
I just received a small lot of 2c green plate blocks from this issue, many with the lower left positions showing the order numbers. I have updated the post that I wrote on October 30, 2015 dealing with this topic to include the order numbers as well as the spacing between the numerals, as I have become aware of differences in the spacing between the numbers themselves.
You can read about it in the updated post via the following link:
Today, we get into the inks used to print the Centennial issue, as they appear under, or are affected by long-wave ultraviolet light, or black light. Today's post will discuss what I mean by this, and then will look at some of the differences that appear on the 1c through 4c values of the series.
Our perception of colour is a function of how the pigments interact with the light that illuminates them. How an ink will appear under yellow incandescent light will be different from how it appears under daylight, which will differ still from how it appears under various forms of coloured light. However, usually a colour will appear more or less the way you would expect it to appear with the addition of the colour that is inherent in the light. Long wave ultraviolet light is of course, a purple light. So the appearance of most colours would appear darker and washed over with a purple undertone. I would refer to these inks as non-transformative, because the introduction of black light do…
Today, I finish off my examination of the 15c Bylot Island stamp from the series, with an exploration of the printings made using PVA gum. Unfortunately I do not have some of the scarcer paper varieties on hand, so my descriptions will be less than complete, and I will have to add examples as they become available.
Unitrade lists four varieties of the untagged stamps, three of which are very scarce, and does not list any plastic flow varieties, even though they clearly do exist on the untagged PVA gum printings, as well as on the dextrine gum printings. I have started to use the term dextrine rather than dextrose after David Gronbeck-Jones, the famous Centennial issue specialist and author pointed out to me that dextrose is the sugar from which the dextrine gum is made. The tagged stamps are listed by Unitrade as existing with both Winnipeg tagging and General Ottawa tagging, on both dull and low fluorescent papers, for a total of 4 basic varieties. All of these exist, of course with…
Earlier this week I had a conversation with a philatelist who responded to my blog posts this past week. He said that he thought that the widespread availability of basic stamp information had made the professional stamp dealer somewhat obsolete, and that this was why dealers like myself were having difficulty building loyal customer bases.
I thought about it for a while and then I realized why I felt he wasn't 100% correct in his analysis:
Knowledge does not equal experience!
Then I had a thought flash in my mind - about travel agents. When it became possible to book airline trips and vacations online a number of years ago, the conventional wisdom was that travel agents were now obsolete and would soon be out of business. But, almost 20 years after online booking of trips became a thing, they are still going strong. Sure, the worst ones went out of business - those that provided little value. But the better agencies are still thriving. Why is this, and what does this have to do w…