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Paperchase was founded by two art students, Judith Cash and Eddie Pond, around 1968. The company went through various owners before receiving investment from W H Smith in 1985; it continued to expand and in 1996 became Paperchase Products Ltd., [2] having been bought by the existing management with investment from a venture capital fund.
The pH value of paper indicates the residual acidic/alkaline chemicals in pulp, or atmospheric pollutants. It is an environmental KPI parameter in paper making. Acidic paper made from wood-based pulp that still contains lignin will deteriorate over time by becoming brittle and turning yellow. [1]
The ideal storage and display environment is oxygen-free, as oxygen prevalence has been shown to react with collagen over time, leading to increased brittleness of parchment. Oxygen-free storage and display cases are filled with inert gas as well as a chemical substance that reacts as an absorber if any stray oxygen leaks into the encasement. [13]
Oxygen scavengers or oxygen absorbers are added to enclosed packaging to help remove or decrease the level of oxygen in the package. They are used to help maintain product safety and extend shelf life. [1] There are many types of oxygen absorbers available to cover a wide array of applications. [2] [3]
The limiting oxygen index (LOI) is the minimum concentration of oxygen, expressed as a percentage, that will support combustion of a polymer. It is measured by passing a mixture of oxygen and nitrogen over a burning specimen, and reducing the oxygen level until a critical level is reached.
1946: Ejection seat – first live test of a reliable, successful modern ejection seat invented by James Martin. [54] 1947: Duty-free shopping invented by Brendan O'Regan. [55] 1950: Flavoured potato crisps invented by Joseph Murphy. [56] 1954: Clofazimine discovered by a medical research team led by Vincent Barry.
Arnotts is the oldest and largest department store in Ireland.It is located on Henry Street, on the north side of central Dublin. [2] [3] Together with the Brown Thomas chain of department stores, it is owned by UK-based Selfridges, which in turn is owned by Thai Conglomerate Central Group and Saudi Arabia's Public Investment Fund (PIF).
These techniques prevent the compounds from reacting with components of air, usually water and oxygen; less commonly carbon dioxide and nitrogen. A common theme among these techniques is the use of a fine (10 0 –10 −3 Torr) or high (10 −3 –10 −6 Torr) vacuum to remove air, and the use of an inert gas: preferably argon, but often nitrogen.
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