Comedia suelta explained

Comedia suelta or simply suelta (From Spanish 'suelto', "loose", "separate") was a practice of printing plays as a separate edition, often simpler than that of a book with collection of plays: cheaper paper, no binding, no cover sheet, ets. The practice was popular since early 16th century onwards. It was similar to the English practice of quarto prints popular since the Elizabethan era.^{[1] [2] [3]}

Notes and References

1. http://teatrosiglodeoro.bne.es/DocumentosPdf/31877/031877.pdf Some Problems Posed by Suelta Editions of Plays
2. "The Comedia Suelta: History of a Format", Edward M. Wilson
3. Margarita Vazques Estevez, "Comedias sueltas del 'Institut de Teatre' en Barcelona", Edition Reichenberger, 1987,, 220pp., p. 7, Introduction