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B-PLOT makes coverings and other things. 

Jess Blaustein is an artist, urban researcher, educator, and wannabe spy. With backgrounds across architecture, craft, and the humanities, she often uses found and discarded materials to tell stories of bodies and spaces, especially spaces underneath and in-between. Jess makes conceptual objects under the name B-PLOT and is also the co-founder of STUDIOOSS Applied Arts Collective. She lives and works in the lower Hudson Valley with a vintage Bernina 830, three boys, and a dog named after Djuna Barnes.  [CV] [Artist Statement]

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Why B-PLOT?
Plot as piece of ground, also storyline
To plot as to map-make, also to scheme
B is for sub- because less can be more
For secondary or supporting, like some say craft is to art
And because Plan B may have been the better plan all along

plot (v.)  1580s, "to lay plans for" (usually with evil intent); 1590s in the literal sense of "to make a map or diagram," from plot (n.). Related: Plotted; plotter; plotting. 

plot (n.)  Old English plot "small piece of ground," of unknown origin. Sense of "ground plan," and thus "map, chart" is 1550s; that of "a secret, plan, scheme" is 1580s, probably by accidental similarity to complot, from Old French complot "combined plan," of unknown origin, perhaps a back-formation from compeloter "to roll into a ball," from pelote "ball." Meaning "set of events in a story" is from 1640s. Plot-line (n.) attested from 1957.  

plat (n.)  "piece of ground," 1510s, a variant of plot (n.) assimilated to Middle English plat (adj.) "flat," which is from Old French plat "flat, stretched out" (see plateau (n.)). (Online Etymology Dictionary)

B  Often indicating "second in order." B-movie is by 1939, usually said to be so called from being the second, or supporting, film in a double feature. Some film industry sources say it was so called for being the second of the two films major studios generally made in a year, and the one cast with less headline talent and released with less promotion. And early usage varies with grade-B movie, suggesting a perceived association with quality. B-side of a gramophone single is by 1962 (flip-side is by 1949). 

B-girl, abbreviation of bar girl, U.S. slang for a woman paid to encourage customers at a bar to buy her drinks, is by 1936. (Online Etymology Dictionary)

subplot  (n.) 1 : a subordinate plot in fiction or drama  2 : a subdivision of an experimental plot of land (Merriam-Webster) 

subplot  (n.) a part of the story of a book or play that develops separately from the main story (Cambridge Dictionary)