Paper fibre can be recycled up to five times, but each time it is recycled, it loses some of its strength. Thus, some newspaper pulp cannot be used again to make new newspaper. 100 percent recycled newspaper is not really an option, then, as publishers do not want to sacrifice too much quality in their product for the sake of conservation. However, using up to 80 percent recycled materials to make newspaper is shown to have little effect on the strength of the paper when compared to newspaper made from materials that make up, say, 40 percent recycled materials. Glossy paper, such as the kind used for advertising inserts, are often coated in materials that are not compatible with recycling machinery and are thus not as environmentally friendly as standard (pulplike) newspaper.
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