Canada #593bi (SG#700a) 8c Ultramarine Queen Elizabeth II 1972-1978 Caricature Issue Plate 6 UL DF Paper Type 5 VF-80 NH

A well centered and very fine NH plate 6 upper left block of the 8c ultramarine Queen Elizabeth II stamp from the 1973-1977 Caricature Issue. Printed on vertical wove paper showing no ribbing on either the front or back, and with a burnished smooth texture on the printed surface. The paper gives a dull fluorescent greyish white reaction under ultraviolet light on the face, and a low fluorescent greyish white reaction on the back, with a sparse concentration of low fluorescent fibres and very few brownish woodpulp fibres visible in the paper. General OP-2 Ottawa tagging, 4 mm wide, of very weak strength (almost invisible to the naked eye), and glowing a bright yellow under ultraviolet light. Comb perforated 13.0 x 13.3, with the selvage fully perforated through on both sides. In addition, there is just the slighest hint of double perforating at the top of the upper selvage, from where one perforating comb strike ends and the other begins. This confirms that this block is from a lower pane in the overall sheet layout. Smooth, white PVA gum with a satin sheen. Unitrade lists 593bi as DF paper. I have found at least five varieties of paper that are DF overall, but differ slightly. This is one of those variations. Unitrade values a VF-75 NH plate block of the basic DF paper at $10.00. The block offered here grades 80 as follows: Margins/centering: 50/70 Paper freshness: 5/5 Colour: 5/5 Impression: 5/5 Absence of visible paper flaws: 5/5 Perforations: 10/10 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.