Parchmentising
Parchmentising or parchmentizing is a kind of
Parchment
Parchment was a material for writing created in
Organdy
Parchmentising offers a stiffened and somewhat translucent finish. Organdy is one of the sheerest cloths produced by the process.[1][3][4]
Development
Parchmentising was described in 1850 by John Mercer, who treated cotton with solutions of 110–125 °Tw sulfuric acid, at room temperature, followed by washing. Mercer observed that the treated fabric was soft like fine wool when treated at 110 °Tw, shrank and stiffened at 114 °Tw, or shrank, stiffened, and became semi-transparent from 116 to 125 °Tw. In general, treating indefinitely with concentrations below 110 °Tw (64%) only swells and shrinks the fabric, while higher concentrations produce the stiff, translucent parchment-like effect in a few seconds, with some loss of tensile strength.[5]
Textile makers have combined sulfuric acid treatment with other processes to achieve different effects. For example,
References
- ^ ISBN 978-0-03-050723-6.
In parchmentizing transparent or parchment like fabrics are produced from cellulosic fibers with sulfuric acid
- ISBN 978-0-8225-2996-5.
- ^ ISBN 978-0-13-118770-2.
- ^ Hollen, Norma R.; Saddler, Jane (1968). Textiles. Internet Archive. New York, Macmillan. pp. 139, 189.
- ^ a b J. T. Marsh (1948), "Dispersion Processes", An Introduction To Textile Finishing, pp. 121–122