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  2. Waterproof paper - Wikipedia

    en.wikipedia.org/wiki/Waterproof_paper

    Waterproof paper uses special coatings ( plastic-coated paper) and fibers to enhance durability, dimensional stability, tear resistance and resistance to changing shape or texture when exposed to water. The paper has applications for wet or damp environments, including outdoor, marine, field uses as well as printing applications for similar ...

  3. Tar paper - Wikipedia

    en.wikipedia.org/wiki/Tar_paper

    Tar paper is a heavy-duty paper used in construction. Tar paper is made by impregnating paper with tar, producing a waterproof material useful for roof construction. Tar paper is similar to roofing felt, [1] historically a felt -like fabric made from recycled rags impregnated with melted asphalt, and today evolving into a more complex ...

  4. Portal:Current events/April 2022/Calendar - Wikipedia

    en.wikipedia.org/.../April_2022/Calendar

    This page was last edited on 15 December 2021, at 22:04 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike License 4.0; additional terms may apply.

  5. AOL Calendar - AOL Help

    help.aol.com/products/aol-calendar

    Create, share, or subscribe to a calendar. Learn how to stay in touch with the people in your life by creating, sharing, or subscribing to a calendar. Calendar · Oct 28, 2023. Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or ...

  6. Perpetual calendar - Wikipedia

    en.wikipedia.org/wiki/Perpetual_calendar

    A perpetual calendar is a calendar valid for many years, usually designed to look up the day of the week for a given date in the past or future. For the Gregorian and Julian calendars, a perpetual calendar typically consists of one of three general variations: Fourteen one-year calendars, plus a table to show which one-year calendar is to be ...

  7. Timeline of the COVID-19 pandemic in April 2022 - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_COVID-19...

    e. This article documents the chronology and epidemiology of SARS-CoV-2, the virus that causes the coronavirus disease 2019 ( COVID-19) and is responsible for the COVID-19 pandemic, in April 2022. The first human cases of COVID-19 were identified in Wuhan, China, in December 2019.

  8. Waxed paper - Wikipedia

    en.wikipedia.org/wiki/Waxed_paper

    Waxed paper (also wax paper, waxpaper, or paraffin paper) is paper that has been made moisture-proof and grease-proof through the application of wax . The practice of oiling parchment or paper in order to make it semi-translucent or moisture-proof goes back at least to the Middle Ages. Paper impregnated or coated with purified beeswax was ...

  9. Paper chemicals - Wikipedia

    en.wikipedia.org/wiki/Paper_chemicals

    Paper chemicals designate a group of chemicals that are used for paper manufacturing, or modify the properties of paper. These chemicals can be used to alter the paper in many ways, including changing its color and brightness, or by increasing its strength and resistance to water. [1] The chemicals can be defined on basis of their usage in the ...

  10. Wet strength - Wikipedia

    en.wikipedia.org/wiki/Wet_strength

    These are dependent on physical contact between the fibres and can be broken by wetting of the fibres. The residual strength of a wetted paper can be less than 10% of the original strength. Various techniques, such as refining of the pulp and wet pressing on the paper machine can be used to reduce the strength loss of the paper upon wetting. To ...

  11. Sandpaper - Wikipedia

    en.wikipedia.org/wiki/Sandpaper

    Sandpaper. Sheets of sandpaper with different grit sizes (40 (coarse), 80, 150, 240, 600 (fine)) Sandpaper, also known as glasspaper or as coated abrasive, is a type of material that consists of sheets of paper or cloth with an abrasive substance glued to one face. [1] In the modern manufacture of these products, sand and glass have been ...