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Pillar Of The Community
Netherlands
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Here is an example of how easy it is to misidentify deep purple. The left stamp, when bought as part of the set and compared to the 3d and 6d stamps, appears a deep purple.  It, however, is just purple. Only when you have a true deep purple example to compare it with it becomes clear that the left is a normal purple printing (there is variation).  Note also the variation in the colour of the blue paper. There is just one colour listed. Again: variation in colour does not constitute having as many listed colours: i.e., the orange paper is very distinctive. |
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| Edited by NSK - 06/09/2025 04:24 am |
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Bedrock Of The Community
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Pillar Of The Community
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Thanks for the info, NSK. I knew that when you entered the discussion there would be plenty of good information to scratch... As you argued earlier, I can naturally fill in the blanks however I want, but I really do it as best I can, judging by the material I get... My options are currently limited to this: In the 2D: 2 pale, 3 purple (two first of second line and the third of first line), 1 presumed deep purple (the last one in the second line; I made a mistake when placing them; it should go in the first line). In the 3D: 2 deep purple (compared to the other models I've already posted). In the 6D: 1 specimen that I can't compare with any other of its kind, so for now it remains in limbo. On the other hand, making mistakes and correcting what was previously misclassified is also part of the game, seeking the satisfaction of complete certainty of identification.  |
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Valued Member
United Kingdom
317 Posts |
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 Perkin's Violet, also known as Mauve, Mauveine, Tyrian Purple and Aniline Purple amongst other names. Amino-phenylamino-p-tolyl Ditolazonium Sulphate. Colours range from reddish-violet, purple, to bluish-violet. Quote "…used formerly for printing the old British lilac penny stamps (Queen Victoria issue)" Ref:Index No. 846 in XVII Azine Colouring Matters: 4 Safranines (a) Benzosafranines "Colour Index" The Society Of Dyers and Colourists 1924. |
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Valued Member
United Kingdom
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William H. Perkin the chemist, and not Jacob Perkins the printer. He named his dyestuff Tyrian Purple and then Mauveine, because it was mauve in colour. The name 'mauve' is apparently derived from French 'maive', the name for the mallow flower. In English the name for the colour was originally mallow. The colour of the purple on the 3d. seems close to mauve taupe, which is tending towards brown.
The quote should have been "…also formerly for the manufacture of the lake used for printing the old British lilac penny stamps (Queen Victoria issue)"
So the dyestuff is converted to a lake when used for printing- it's rendered insoluble by the addition of metal salts. The process could be a chemical interaction (precipitation of a salt containing a fixed ratio of dye to metal) or physical (dye sticks to particles of the metal salt). |
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Once you start manipulating images in a color discussion you can pretty much put a fork in the topic. |
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I'm just trying to make it more visible... the first ones were too pale. I'll look for a scanning tutorial so the images will be better for future tennis matches. |
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Valued Member
United Kingdom
317 Posts |
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You could get hold of a Kodak grey (gray) scale or similar. That'll give a neutral, in a fashion, after you've used the Levels tool on the scan.
Way back when, Photoshop jockeys used to use some kind of hockey-puck thing on their screens to caiibrate the monitor. But that was when monitors were made out of glass, and weighed half a ton. Also, half your intended audience has incipient cataracts, and see the world in a pale yellow fashion. |
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Valued Member
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Actually, even if this is a tennis match (and that picture above may be one of the first depictions of a mixed doubles) I've enjoyed reading this- I've learnt something! Thanks, Murasama! |
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Pillar Of The Community
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I've had fun too... sometimes I think there's something masochistic about me... |
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Valued Member
United Kingdom
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 Apologies for the scrappy scan. The example on the left actually looks purple/mauve. * * * Link corrected by Moderator * * * |
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Valued Member
United Kingdom
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Pillar Of The Community
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You. immediately, can see which among these 3d stamps could be an orange paper one. That means, whereas it isimpossible to be sure to tell from a scan a paper is orange, it is very easy to tell which among a group are not.
The orange stands out. You do not need all kinds of trickery to make it look orange. None of the posted stamps stands out as orange among the others.
Put simply: No orange! - |
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| Edited by NSK - 06/24/2025 11:48 am |
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Valued Member
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Yep- and I was so looking forward to parading with it on July 12th.  The colour reminds me of using potassium dichromate as a wood stain. |
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