In today’s episode, we will be talking about stamps, pen clubs, the postmark experiment, and the table of letterlocking

Erasable Fountain Pen ink: https://www.instagram.com/p/CO_PXcODU1G/

https://www.kiwiinks.com/collections/erasable/products/erasable-ink

Another Space Retro51: https://www.instagram.com/p/CPBS5_PjPMH/?utm_source=ig_web_copy_link

Sun Science Stamps:

https://about.usps.com/postal-bulletin/2021/pb22572/html/info_004.htm

Postmarks:

https://about.usps.com/postal-bulletin/2021/pb22572/html/info_006.htm

https://www.wsel.com/sites/default/files/uploads/pdfs/EMA_History.pdf Unlocking History, Table of Letterlocking

http://letterlocking.org/categories

Metric Paper video from CPG Grey