Made possibly in the 1950s or 60s, these were made as an alternative, less expensive version of real animal parchment.
calligraphy, botanical watercolour, legal documents and certificates
The manufacturing process was a closely guarded secret but loosely involved boiling the fibres (linen or cotton rag) for a long time followed by a long stint in the Hollander beater which helped give the fibres a hardness and translucency not normally required in everyday paper.
We are not entirely sure who made these papers but we're best-guessing at WS Hodgkinson of Wookey Hole, Somerset.
560 x 440 mm, 22 x 17 1/4 inches
130 - 160gsm
130gsm - smooth with a very very subtle tooth, akin to goatskin parchment.