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Understanding Paper and Board Production: Types, Measurements, and Quality

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Explore the fascinating world of paper and board production, learning how papers and boards are made and why numerous types exist. This guide covers the key quality measurements such as cost, finish, strength, brightness, and thickness. Understand the manufacturing processes like coating, sizing, and laminating to alter working characteristics. Gain insight into the unit measurements for paper (grams per square meter) and board (microns), and discover specific uses and standards, such as what defines card weight and typical thickness of greeting cards.

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Understanding Paper and Board Production: Types, Measurements, and Quality

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Presentation Transcript

  1. Paper, Card & Board Production

  2. Objectives • Learn how papers and boards are made • Understand why there are so many different types • Know the units that paper and card are measured in

  3. Paper Production

  4. Quality? • The main qualities that can be measured in paper are: • Cost • Finish • Strength • Brightness (whiteness) • thickness

  5. Manufacture • There are three main ways to alter the working characteristics of paper and card: • Addition of a coating to the surface such as China clay or chalk – sprayed on surface for a smoother finish • Addition of sizing agent – improves ability of paper or card to accept ink by sealing the absorbency. The coating and sizing affect the whiteness of the paper or card • Laminating – layers of board can stuck together with different characteristics to produce different card

  6. Weight and thickness • Paper is sold by weight in grams per square metre (GSM). When paper is 220gsm or above it is regarded as being board. • Board is measured in thickness in units called microns (µm). There are 1000 microns in 1mm so a birthday card is around 300 microns (0.3mm)

  7. Tasks • Identify 5 processes and label using the first slide of this slide show

  8. Tasks Continued… • Describe the three ways in which the properties of paper and board can be changed during manufacture • What does gsm stand for and what is it used to measure? • At what weight is paper considered to be card? • What thickness is a typical birthday card?

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