Lesson plan
Wallpaper paste
Wallpaper adhesive or wallpaper paste is a specific adhesive, based on modified starch, methylcellulose, or clay which is used to fix wallpaper to walls. Wallpaper pastes have a typical shear thinning viscosity and a high wet adhesive tack. These properties are needed to slow down the penetration of the adhesive into the paper and wall, and give slow bonding speed which gives the wallpaper hanger time to line up the wallpaper correctly on the wall. The adhesive is usually sold in pouches or boxes as flakes that are mixed with water to produce the paste. It is also available ready mixed in tubs. The wallpaper adhesive is applied to the wallpaper to let the moisture of the adhesive soak into and penetrate the paper. The paper will thus expand before hanging rather than on the wall, which would cause vertical bubbles in each panel of wallpaper as the adhesive dried from the edges in. When using a type of wallpaper paper that does not expand, such as nonwoven or fiberglass wallpaper, the adhesive is applied to the wall instead.
Article summary
Wallpaper adhesive or wallpaper paste is a specific adhesive, based on modified starch, methylcellulose, or clay which is used to fix wallpaper to walls. Wallpaper pastes have a typical shear thinning viscosity and a high wet adhesive tack. These properties are needed to slow down the penetration of the adhesive into the paper and wall, and give slow bonding speed which gives the wallpaper hanger time to line up the wallpaper correctly on the wall. The adhesive is usually sold in pouches or boxes as flakes that are mixed with water to produce the paste. It is also available ready mixed in tubs. The wallpaper adhesive is applied to the wallpaper to let the moisture of the adhesive soak into and penetrate the paper. The paper will thus expand before hanging rather than on the wall, which would cause vertical bubbles in each panel of wallpaper as the adhesive dried from the edges in. When using a type of wallpaper paper that does not expand, such as nonwoven or fiberglass wallpaper, the adhesive is applied to the wall instead.
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.