Chemistry:Wheatpaste
Wheatpaste (also known as flour and water paste, flour paste, or simply paste) is a gel or liquid adhesive made from wheat flour or starch and water. It has been used since antiquity for various arts and crafts such as bookbinding,[1] découpage, collage, papier-mâché, and adhering paper posters and notices to walls.
Types
A critical difference among wheat pastes is the division between those made from flour and those made from starch. Vegetable flours contain both gluten and starch. Over time the gluten in a flour paste cross-links, making it very difficult to release the adhesive. Using only starch, a fine quality, fully reversible paste can be produced. The latter is used as an adhesive for paper and book conservation.[2][3]
Uses
Activists and various subculture proponents often use this adhesive to flypost propaganda and artwork. It has also commonly been used by commercial bill posters since the nineteenth century. In particular, it was widely used by nineteenth and twentieth century circus bill posters, who developed a substantial culture around paste manufacture and postering campaigns.[4] In the field of alcohol and nightclub advertising, in the 1890s, Henri de Toulouse-Lautrec's posters were so popular that instructions were published on how to peel down the pasted posters without damage.[5]
Until the 1970s, commercial poster hangers always "cooked" their own paste, but since then many have bought pre-cooked instant pastes.[6] It is applied to the backside of paper then placed on flat surfaces, particularly concrete and metal as it does not adhere well to wood or plastic. Cheap, rough paper such as newsprint, works well, as it can be briefly dipped in the mixture to saturate the fibres.
See also
- Chemistry:Animal glue – Adhesive created from boiling animal connective tissue
- Chemistry:Polyvinyl acetate – Adhesive used for porous materials
- Biology:Rice glue
- Flyposting – Marketing tactic of putting up advertising posters
References
- ↑ Hannett, John (2010). Bibliopegia: Or the Art of Bookbinding, in All Its Branches. Cambridge University Press. p. 184. ISBN 978-1-108-02144-9. https://books.google.com/books?id=6O0YcnwsR-MC&pg=PA184.
- ↑ "7.6 Conservation Treatment for Bound Materials of Value" (in en). https://www.nedcc.org/free-resources/preservation-leaflets/7.-conservation-procedures/7.6-conservation-treatment-for-bound-materials-of-value.
- ↑ Institute, Canadian Conservation (2017-09-14). "Wheat Starch Paste – Canadian Conservation Institute (CCI) Notes 11/4". https://www.canada.ca/en/conservation-institute/services/conservation-preservation-publications/canadian-conservation-institute-notes/wheat-starch-paste.html.
- ↑ Darlington, Edgar B. P (1911) (in en). The Circus Boys on the Plains; Or, The Young Advance Agents Ahead of the Show. https://www.gutenberg.org/ebooks/2478.
- ↑ "Posters Weren't the Half of Him". New York Times Book Review. 16 January 2000. https://query.nytimes.com/gst/fullpage.html?res=9800E6D8123BF935A25752C0A9669C8B63.
- ↑ "Ethical Considerations for the Conservation of Circus Posters". WAAC Newsletter 17 (2). May 1995. https://cool.culturalheritage.org/waac/wn/wn17/wn17-2/wn17-205.html. Retrieved 11 July 2006.
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