To turn. the device off, hold the On/Off button down until the screen dims and the red âslide to power offâ slider appears. Slide your finger across the switch, and the iPhone powers down. (To turn your device back on, press and hold.
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Other materials used in paper manufacture include bleaches and dyes, fillers such as chalk, clay, or titanium oxide, and sizings such as rosin, gum, and starch. 1 Several processes are commonly used to convert logs to wood pulp. In the mechanical process, logs are first tumbled in drums to remove the bark.