Serious stamp collectors like to know whether the stamp is printed on chalky paper or not. I’m told the only accepted way is to make a mark on the perforation with a piece of pure silver. I was asked to make a tester and here it is ( with the help of my wood turner friend).
![Chalky paper tester for stamp collectors](https://www.jhsilver.co.uk/blog/wp-content/uploads/2014/01/ss1017-Img_1955-300x300.jpg)
This particular handle is bubinga wood.