On Fri, 15 May 2020 17:54:36 -0500, dpb wrote:

On 5/15/2020 4:02 PM, Commander Kinsey wrote:
...

Why can't it still crack the flush plaster you put over the tape?

The paper if flexible enough to give.

Surely gypsum board is in use throughout the world; can't be only US.
It was invented by the Brits - Sackett Board was invented in 1894 by
Augustine Sackett and Fred Kane, graduates of Rensselaer Polytechnic
Institute. It was made by layering plaster within four plies of wool
felt paper. Sheets were 36 by 36 by 1/4 inch (91.44 cm × 91.44 cm ×
0.64 cm) thick with open (untaped) edges.[3]
Gypsum board evolved between 1910 and 1930 beginning with wrapped
board edges and elimination of the two inner layers of felt paper in
favor of paper-based facings. In 1910 United States Gypsum Corporation
bought Sackett Plaster Board Company and by 1917 introduced Sheetrock.