theamateurphilatelist
Member 
Keep calm and collect stamps!!
Posts: 317 
What I collect: India, Machins, India, Laos, Austria, Russia, Commonwealth omnibuses, Covers, Birds
|
Post by theamateurphilatelist on Oct 25, 2018 8:00:12 GMT
Seeking some expert advice. Came across a huge color variation of India 8as stamp. While my first reaction is that it is caused by fading, I am just wondering how could dark blue/violet fade to become brown. Would anyone be able throw some light on this? There is no listed variety of this color variation.
|
|
|
|
Post by sherro on Oct 25, 2018 10:08:29 GMT
My guess would be that the red component of the violet has been sunfaded, but would that leave brown? I don't know
|
|
nikhil
Member
Working on Australia, GDR, Japan
Posts: 552
What I collect: I collect WW. Looking for early issues.
|
Post by nikhil on Oct 25, 2018 11:22:16 GMT
Is the right side one listed? Since I have it.
|
|
salentin
Member
collecting Germany,where I live and about 20 more countries,half of them in Asia east of the Indus
Posts: 6,506
|
Post by salentin on Oct 25, 2018 12:14:29 GMT
As the 8 Annas stamp is a rather cheap one,you probably have or have access to a number of duplicates. Just take one damaged or otherwise worthless specimen and leave it for a while,some hours or days, exposed to full sunlight.Perhaps you will get the same fading as shown above. However such a changeling can be also produced by some chemicals.But that would be much more difficult to find out.
|
|
theamateurphilatelist
Member
Keep calm and collect stamps!!
Posts: 317
What I collect: India, Machins, India, Laos, Austria, Russia, Commonwealth omnibuses, Covers, Birds
|
Post by theamateurphilatelist on Oct 25, 2018 12:35:02 GMT
As the 8 Annas stamp is a rather cheap one,you probably have or have access to a number of duplicates. Just take one damaged or otherwise worthless specimen and leave it for a while,some hours or days, exposed to full sunlight.Perhaps you will get the same fading as shown above. However such a changeling can be also produced by some chemicals.But that would be much more difficult to find out.
Interesting thought, should try it out |
|
theamateurphilatelist
Member
Keep calm and collect stamps!!
Posts: 317
What I collect: India, Machins, India, Laos, Austria, Russia, Commonwealth omnibuses, Covers, Birds
|
Post by theamateurphilatelist on Oct 25, 2018 12:35:26 GMT
Is the right side one listed? Since I have it. Yes Nikhil, right side one is listed |
|
renden
Member
Posts: 9,162
What I collect: Canada-USA-France-Lithuania-Austria--Germany-Mauritius-French Colonies in Africa
|
Post by renden on Oct 25, 2018 20:06:37 GMT
Do agree, changelings can be a tough "road"
|
|
brightonpete
Departed
Rest in Peace
On a hike at Goodrich-Loomis
Posts: 5,110
|
Post by brightonpete on Oct 28, 2018 14:52:54 GMT
Looking at these two stamps, I'd be hard pressed to call it a fade. It looks far to uniform for fading to me.
It looks like it was printed in the colour of the 4 As (train) of the series.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 28, 2018 15:38:36 GMT
Exposing a stamp to full sunlight is probably not a proper test and what would it prove? I am not sure who exposes their stamp collection to natural sunlight were UV rays play a major role in the fading. Light fading does not as a rule maintain the original details which also disappear and did not in this case. Blue unlike yellow, red, orange is far more resistant to sunlight or artificial light Blue coloring agents reflect the higher-energy light from the blue end of the spectrum rather than absorb it, and so they avoid being broken down. In some cases where the blue (older classics) is made up of different pigment, a change with time (oxidation/sulferation) is possible.
Something like Potassium Permanganate which is readily available and a strong oxidizer would effect a color change into red/violet shades. Note that on the stamp the postmark has been discolored in some places as black is the most resistant color and generally changes to a somewhat brownish shade under chemical alteration.
|
|
salentin
Member
collecting Germany,where I live and about 20 more countries,half of them in Asia east of the Indus
Posts: 6,506
|
Post by salentin on Oct 28, 2018 16:02:26 GMT
A nice example how different scans of the same stamp can look ! I think it is highly unlikely,that a colour error would have been undiscovered for so many years. The second scan looks like caused by chemical alteration.
|
|
darkormex
Member
Swinging through Switzerland and getting tied up in Thailand
Posts: 2,197
What I collect: The World...just printing and mounting as I go...call me crazy!
|
Post by darkormex on Apr 15, 2019 0:27:39 GMT
Coincidentally, I have a stamp that fits the bill for this particular thread in the India area. The 1965-68 Indian definitive series has a 1 rupee denomination depicting a Chandella Carving of a Woman Writing a Letter from the 11th Century. The Scott no. is 419 and it's color is described as being deep claret and red brown. Below is this stamp with colors as described as well as a block of 8 (two stamps have about 1/4 cut off). As you can see the color is vastly different from normal stamp. Does anyone have any insight into an color differences described in any specialized Indian stamp catalogs? I have found no mention of this in Scott. To be honest, I doubt that this is any type of printing difference and this block of 8 is either chemically discolored or may have been set in or near a window and is faded from the sun. All the same, I thought the community may have some further knowledge regarding this color difference.   |
|
salentin
Member
collecting Germany,where I live and about 20 more countries,half of them in Asia east of the Indus
Posts: 6,506
|
Post by salentin on Apr 15, 2019 2:48:03 GMT
I think you guess is correct.The bloc looks like sun-bleached.
|
|
darkormex
Member
Swinging through Switzerland and getting tied up in Thailand
Posts: 2,197
What I collect: The World...just printing and mounting as I go...call me crazy!
|
Post by darkormex on Apr 15, 2019 2:55:29 GMT
I think you guess is correct.The bloc looks like sun-bleached. Also, if you look from left to right, you can see a slight gradation of color as if the two edges may have been more in shadow than the center portion. |
|
