Canada #926A (SG#1162) 36c Plum Queen Elizabeth II 1982-1987 Artifacts Issue Vertical Wove Harrison Paper NF/DF-fl Deep Yellow Tagging UR Corner Block VF-84 NH

A very well centered and very fine mint NH upper right blank field stock block of 4 of the 36c bright plum Queen Elizabeth II bas-relief definitive stamp from the 1982-1987 Artifacts definitive issue. Comb perf. 13 x 13.3. Vertical wove Harrison paper, with smooth chalk-surfacing. Smooth bluish white PVA gum with a satin sheen. Mottled deep yellow GT-4 OP-2 tagging. Under ultraviolet light, the paper gives a non fluorescent grey violet reaction on the front, and a dull fluorescent greyish white reaction on the back, with no fluorescent fibres visible in the paper. Unitrade does not specify the paper fluorescence of this stamp, but all examples that I have seen are of this variety. All examples that I have seen are printed on Harrison paper, with the majority of examples being on vertical wove paper (stamp curls from side to side). The gum is almost always the bluish white type seen here, but examples with a cream gum lacking the bluish tint do exist and are much scarcer. Unitrade values a VF-75 NH blank corner block at $20. No plate blocks exist for this stamp, according to Unitrade. The block offered here grades VF-84 NH as follows: Margins/centering: 54/70 Paper freshness: 5/5 Colour: 5/5 Impression: 5/5 Absence of visible paper flaws: 5/5 Perforations: 10/10 Note any vertical or horizontal line shown in the scan is the edge of the acetate strip that the stamp was resting inside on the stockcard. Note: the above scan is a stock photo as are all my scans for material after 1952. The item(s) you will receive has (have) been carefully checked to adhere to the above grading standards, so while it (they) may not be exactly the same, it (they) will be of the same quality. Also, I do not provide back scans of NH stamps or blocks after 1952 unless they are required to illustrate some attribute of the paper or gum.