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By storing them in the dark, these light-sensitive materials that are dyed or painted are protected. To prevent bumping and chipping, the storage drawers and shelves are lined with a chemically stable cushioning material such as polyethylene or polypropylene sheeting, as opposed to a rubber-based material that can produce unnatural yellowing. [2]
Cellulose acetate is also known as "safety" film and started to replace nitrate film in still photography in the 1920s. [1] There are several types of acetate that were produced after 1925, which include diacetate (c. 1923 – c. 1955), acetate propionate (1927 – c. 1949), acetate butyrate (1936–present), and triacetate (c. 1950 – present). [1]
Polyvinyl chloride is formed in flat sheets in a variety of thicknesses and colors. As flat sheets, PVC is often expanded to create voids in the interior of the material, providing additional thickness without additional weight and minimal extra cost (see closed-cell PVC foamboard). Sheets are cut using saws and rotary cutting equipment.
Food storage nowadays relies mainly on plastic food storage containers. A basic but important distinction is between single-use / disposable and multi-use / durable containers. The former makes up a notable portion of the global plastic waste (e.g. toothpaste tubs, food delivery foam containers, most plastic bottles, etc.).
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A popular furniture hardwood is American black cherry. Cherry is a light reddish brown to brown color that intensifies into a rich color as it ages, and grows mostly in the eastern United States. Cherry has a tighter grain than birch and is softer. Much cherry lumber is narrow, and it has been utilized to make many lovely classic furniture ...
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