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!

Where Does The US Postal Card Fit??

 
To participate in the forum you must log in or register.
Author Previous TopicReplies: 8 / Views: 562Next Topic  
Pillar Of The Community
Learn More...

United States
778 Posts
Posted 04/06/2019   09:28 am  Show Profile Bookmark this topic Add Moyock13 to your friends list Get a Link to this Message
I've not seen any area designated for the US Postal Cards. Or is this just not an area of interest for the forum?

Reason for my interest is any discussion on watermark detection on the early postal cards other than sticking it in front of a bright light? It's very difficult to see the watermark let alone determining if it's large or small.

Any insight would be welcome.

Thanks.
Send note to Staff

Moderator
Learn More...
United States
10057 Posts
Posted 04/06/2019   09:30 am  Show Profile Check 51studebaker's eBay Listings Bookmark this reply Add 51studebaker to your friends list  Get a Link to this Reply
This is the correct section, we do not have a dedicated section for postal cards.

I am not aware of alternative methods for detecting postal card watermarks other than a strong bright light.
Don
Send note to Staff  Go to Top of Page
Pillar Of The Community
Learn More...
United States
778 Posts
Posted 04/06/2019   10:01 am  Show Profile Bookmark this reply Add Moyock13 to your friends list  Get a Link to this Reply
Thanks Don. Wasn't too sure about an alternative method for detecting a watermark. And I wasn't sure if a postal card would stand up to watermark fluid or if that would even work.
Send note to Staff  Go to Top of Page
Valued Member
United Kingdom
119 Posts
Posted 04/06/2019   12:15 pm  Show Profile Bookmark this reply Add usinbritain to your friends list  Get a Link to this Reply
There's at least one other method for detecting watermarks on early US postal cards: contact print. When I purchased Dr Gundel's specialized collection of postal cards, it included a few examples of scarce cards with contact prints of the watermarks. As he was a scientist by background, he made it sound a simple process but I've never tried it.

If you Google "contact prints" + "postal cards" a few examples show up under Google images (one of Dr Gundel's is about half way down the first page).

Steve Taylor https://stephentaylor.co.uk
Send note to Staff  Go to Top of Page
Pillar Of The Community
Learn More...
United States
778 Posts
Posted 04/06/2019   12:48 pm  Show Profile Bookmark this reply Add Moyock13 to your friends list  Get a Link to this Reply
Steve, thanks. The search didn't work for me. But I did find the entry on your web site about Dr Grundel.
Send note to Staff  Go to Top of Page
Valued Member
United Kingdom
119 Posts
Posted 04/07/2019   07:52 am  Show Profile Bookmark this reply Add usinbritain to your friends list  Get a Link to this Reply
I scanned most of Dr Gundel's collection and saved them on a Google Drive folder here:

https://drive.google.com/drive/fold...?usp=sharing

If you go to the UX4UX5 subfolder, scans 116 & 119 show examples of contact prints.
Hope that helps, Steve
Send note to Staff  Go to Top of Page
Pillar Of The Community
Learn More...
United States
778 Posts
Posted 04/07/2019   08:20 am  Show Profile Bookmark this reply Add Moyock13 to your friends list  Get a Link to this Reply
Thanks Steve. It might just be that it's Sunday morning!

I can see the folder, but I can't open or view the contents.

Appreciate the try.

Ken
Send note to Staff  Go to Top of Page
Pillar Of The Community
United States
509 Posts
Posted 04/07/2019   08:53 am  Show Profile Bookmark this reply Add jobi01 to your friends list  Get a Link to this Reply
As a postal stationery examiner for APEX, I use a cardboard mask and my Ott light to check for watermarks on US postal cards.

It is theoretically possible to use watermark fluid and a scanner to check for watermarks. The trick is getting the scan before the watermark fluid evaporates. I remember reading an article in an older journal where the watermark fluid saturated card was sandwiched between two glass plates to retard evaporation. I have never tried this method.

Many of the watermarked cards reveal only partial watermarks so a knowledge of how the watermark should look is important. You can get experience in this by examining the watermark on UX1 and UX3.

Older journals also have articles about making contact prints using an X-ray machine. Based on pictures in those articles (mostly authored by doctors), seemed to be very effective. Unfortunately, home X-ray machines are difficult to obtain.
Send note to Staff  Go to Top of Page
Bill Lehr
US Postal Stationery Specialist
Pillar Of The Community
United States
1336 Posts
Posted 04/09/2019   3:52 pm  Show Profile Bookmark this reply Add GregAlex to your friends list  Get a Link to this Reply

Quote:
Older journals also have articles about making contact prints using an X-ray machine. Based on pictures in those articles (mostly authored by doctors), seemed to be very effective. Unfortunately, home X-ray machines are difficult to obtain.


<insert rimshot here>

I've never heard of X-rays being used for philatelic purposes. Are there other examples? This would make a great thread unto itself.
Send note to Staff  Go to Top of Page
Edited by GregAlex - 04/09/2019 3:54 pm
  Previous TopicReplies: 8 / Views: 562Next 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 - 2022 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 - 2022 Stamp Community Forums
It took 0.16 seconds to lick this stamp. Powered By: Snitz Forums 2000 Version 3.4.05