Mar 3, 2025 · Letterlocking – Unlocking History Welcome to letterlocking! You can find essential information about letterlocking and the Unlocking History Research Group here.

Letterlocking is a modern term used to refer to the ways people in the past built security into their letters. Before the invention of envelopes, the letters themselves had to be folded or rolled up …

A letterlocking category is a distinct class of locked letters defined by the unique combination of physical manipulations used to transform a writing substrate into a letterpacket.

The Hidden History of the Letter Unlock the secrets Order the book

Feb 23, 2021 · We define the visual “letterlocking format” as a classification system for locked letterpackets according to their number of edges on the silhouette of a letterpacket, and …

Mar 4, 2025 · Before the invention of the gummed envelope in the 1830s, how did people secure their private letters? The answer is letterlocking—the ingenious process of folding, slitting, and …

Elements of letterlocking innovations can be found in all sorts of places, including some of the most important letters of our times. We are searching for four types of letters with specific …

Mar 4, 2025 · The Dictionary of Letterlocking (DoLL) DoLL provides you with the language to describe what you are seeing and doing as you explore letterlocking. We provide several ways …

Unlocking History is the name for our group of conservators, paleographers, literary scholars, historians, publishers, book-artists, imaging experts, engineers, and scientists who are …

letterlocking format code letterlocking format number locking mechanism lock closure flap tuck (locking mechanism) fold-over (techniques) hybrid lock secure authentication secure …