Stamp Community Family of Web Sites
Thousands of stamps, consistently graded, competitively priced and hundreds of in-depth blog posts to read
Stamp Community Forum
 
Username:
Password:
Save Password
Forgot your Password?

Welcome Guest! Need help? Got a question? Inherit some stamps?
Our stamp forum is completely free! Register Now!

What Is The Site That Can Help Identify Your Stamp Color?

 
To participate in the forum you must log in or register.
Author Previous Topic Topic Next Topic  
Valued Member
United States
431 Posts
Posted 02/03/2020   3:55 pm  Show Profile Bookmark this topic Add 3193zd to your friends list Get a Link to this Message
So you can use this site to scan your stamp and it will analyze it and match it to printing color standards?
Send note to Staff
Michael Darabaris

Moderator
Learn More...
7869 Posts
Posted 02/03/2020   4:02 pm  Show Profile Check 51studebaker's eBay Listings Bookmark this reply Add 51studebaker to your friends list  Get a Link to this Reply
http://www.stampsmarter.com/learnin..._colors.html - See "Color Extractor' tab

But be forewarned...even if you spend a lot of time and money calibrating your scanner, camera, monitor, printer you are still analyzing an image and not the actual stamp. Additionally,this tool identifies 16.7 million colors by percentage. No stamp catalog, color guide, and any other existing reference will match. Also note that over the decades there has been virtually zero effort in defining ambient lighting conditions and there certainly has never been standard color nomenclature that used consistently across the color references.
Don
Send note to Staff  Go to Top of Page
Valued Member
United States
431 Posts
Posted 02/03/2020   4:25 pm  Show Profile Bookmark this reply Add 3193zd to your friends list  Get a Link to this Reply
Thanks Don! I know this just give me an idea of the color but I think it is helpful on old covers.
Send note to Staff  Go to Top of Page
Michael Darabaris
Pillar Of The Community
Australia
843 Posts
Posted 02/04/2020   05:23 am  Show Profile Bookmark this reply Add finches to your friends list  Get a Link to this Reply
Don,

Under UV, my Blue plastic lighter shows up as light purple

'Stanley Gibbons plastic Colour key' colours ALL show up basically Black.....why ?.
Send note to Staff  Go to Top of Page
Moderator
Learn More...
7869 Posts
Posted 02/04/2020   05:44 am  Show Profile Check 51studebaker's eBay Listings Bookmark this reply Add 51studebaker to your friends list  Get a Link to this Reply
Ultraviolet range of the spectrum is typically invisible (for humans) but when viewed under a UV light anything that contains phosphors will glow. This is because phosphor absorbs the UV light energy and then re-emits it as visible light which we can see. Anything that appears black under a UV light has no phosphor because all the light wave lengths are being absorbed (nothing detectable is reflected back to our eyes).

All the colors we see are NOT really a part of the stamp, they are light wave lengths being reflected off the stamps surface. This is why ambient light is by far the most critical part of any color discussion. If a stamp looks black to us it means all the light wave lengths are being absorbed by the stamp. If the stamp looks white to us then all the light wave lengths are being reflected off the stamp. If a stamp looks red to us then the stamp is absorbing all the light wave lengths colors except the red wave lengths. The ambient red wave lengths are what we see as red.
Don

Edit: How important is ambient light in determining the colors we see? Every time you walk into a grocery store, ambient lighting is being used to influence your purchasing decisions. Grocery store have long understood how ambient lighting impacts sales so they manipulate the ambient lighting over things like produce and meats. By making the apples look redder and or the lemons look more yellow they increase the likelihood of shopper buying items. Here are the wave lengths they manipulate in the store to influence the colors of things in the display cases in their stores. (Note how they avoid anything close to natural daylight.)
Send note to Staff  Go to Top of Page
  Previous Topic Topic Next Topic  
 
To participate in the forum you must log in or register.


Go to Top of Page
Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Stamp Community assumes no liability for errors. Copyright 2005 - 2020 Stamp Community Family - All rights reserved worldwide. Use of any images or content on this website without prior written permission of Stamp Community or the original lender is strictly prohibited.
Privacy Policy / Terms of Use    Advertise Here
Stamp Community Forum © 2007 - 2020 Stamp Community Forums
It took 0.12 seconds to lick this stamp. Powered By: Snitz Forums 2000 Version 3.4.05