1. Alkaline hydrogen peroxide is the most commonly used bleaching agent for mechanical pulp . 2. Both chemical pulps and mechanical pulps may be bleached to a high brightness. 3. Wood-free paper is not as susceptible to yellowing as paper containing mechanical pulp . 4. With almost twice the yield as chemical pulping, mechanical pulps is often cheaper. 5. "' Wood-free paper "'is paper created exclusively from chemical pulp rather than mechanical pulp . 6. Kraft pulp has superior strength to sulphite and mechanical pulps . 7. By 1910 the Chicoutimi Pulp Mill became the biggest producer of mechanical pulp in Canada. 8. The Chicoutimi Pulp Mill became the biggest producer of mechanical pulp in Canada by 1910. 9. The bleaching methods are similar for mechanical pulp , but the goal is to make the fiber brighter. 10. The TMPs were also upgraded, allowing the original mechanical pulp mill from the 1960s to be shut down.
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