The categorisation of the types, properties and structure of papers and boards — Edexcel GCSE Design and Technology

Papers and boards are versatile materials derived from wood pulp, used extensively in design and technology for packaging, modelling, and structural applications. This topic covers the categorisation of these materials based on their types, properties, and structures, which is fundamental for selecting the right material for a given design brief. Understanding the differences between paper and board, their manufacturing processes, and how properties like grammage, thickness, and finish affect performance is crucial for creating functional and sustainable products.

In the Edexcel GCSE Design and Technology curriculum, this topic sits within the core technical principles and material categories. It links to broader themes such as sustainability, material selection, and manufacturing processes. Students must grasp how papers and boards are classified (e.g., by weight, surface finish, or end use) and how their properties (e.g., strength, absorbency, flexibility) influence design decisions. This knowledge is applied in contexts like packaging design, where board selection affects protection, printability, and cost.

Mastering this topic enables students to make informed choices when designing products, considering factors like environmental impact (e.g., recycled content, biodegradability) and functional requirements (e.g., folding, die-cutting). It also provides a foundation for understanding other material categories, such as polymers and textiles, by introducing key concepts like material structure and property testing.

• →Grammage (gsm): The weight of paper or board in grams per square metre; lower gsm (e.g., 80 gsm) is typical for writing paper, while higher gsm (e.g., 300+ gsm) is used for board.
• →Types of paper: Includes cartridge paper (for drawing), layout paper (thin, translucent), tracing paper (transparent), and bleed-proof paper (for markers).
• →Types of board: Includes corrugated board (with fluted layers for strength), solid white board (smooth, coated for printing), and grey board (uncoated, used for book covers).
• →Properties: Strength (tensile, tear, burst), stiffness, absorbency, opacity, and surface finish (e.g., coated vs. uncoated) determine suitability for different applications.
• →Structure: Paper has a fibrous structure from wood pulp; board is thicker and may have multiple layers (e.g., linerboard and fluting in corrugated board).

• Ability to discriminate between different types of paper and board
• Understanding of working properties including flexibility, printability, and biodegradability
• Knowledge of specific paper types: copier, cartridge, and tracing paper
• Knowledge of specific board types: folding boxboard, corrugated board, and solid white board
• Application of material knowledge to design contexts

• 💡Ensure you can link material properties to specific product applications
• 💡Be prepared to compare the advantages and disadvantages of different papers and boards
• 💡Use technical terminology when describing material characteristics
• 💡Use specific terminology: In exams, refer to 'grammage' rather than 'weight', and describe properties like 'tensile strength' or 'burst strength' when explaining material choices. This shows deeper understanding.
• 💡Link properties to applications: When asked to select a material, always justify your choice by linking a property to the product's function. For example, 'Corrugated board is used for shipping boxes because its fluted structure provides high compressive strength and cushioning.'
• 💡Consider sustainability: Mention environmental factors like recyclability, biodegradability, and the use of recycled content. This demonstrates awareness of modern design contexts and can earn additional marks.

• Confusing the working properties of papers with those of boards
• Failing to justify material selection based on specific properties
• Inability to distinguish between different board structures like corrugated versus solid white board
• Misconception: All paper is the same, just different thicknesses. Correction: Paper varies in fibre composition, surface treatment, and manufacturing process, affecting properties like absorbency and strength. For example, tracing paper is treated to be transparent, while cartridge paper has a textured surface for pencil grip.
• Misconception: Board is just thick paper. Correction: Board is defined by its grammage (typically over 200 gsm) and often has a layered structure. Corrugated board has fluted layers for strength, while solid board may be laminated from multiple plies.
• Misconception: Recycled paper is always weaker. Correction: Recycled fibres are shorter, which can reduce strength, but modern processing and blending with virgin fibres can produce high-quality recycled paper suitable for many applications.