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Learning objective

Students should understand how pigments can be added to polymers in the moulding process, including: • gel coats when laminating GRP • smart pigments such as thermochromic or phosphorescent. Metal finishing.

Read the explanation, check the common trap, then practise with flashcards and questions.

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Topic

The use of finishes

Subtopic

The use of finishes

Aqa A Level Design And Technology Product DesignTechnical principles

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Quick explanation

Students should understand how pigments can be added to polymers in the moulding process, including: • gel coats when laminating GRP • smart pigments such as thermochromic or phosphorescent. Metal finishing

  • This point belongs to The use of finishes, especially The use of finishes.
  • You need to be able to students should understand how pigments can be added to polymers in the moulding process, including: • gel coats when laminating GRP • smart pigments such as thermochromic or phosphorescent. Metal finishing.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Why it matters

This objective helps connect The use of finishes to exam-style questions, flashcards, and revision notes for The use of finishes.

Quick student answer

Which of the following is a characteristic of thermochromic pigments?

Direct answer

Thermochromic pigments are materials that change color in response to temperature changes, making them useful for applications such as temperature-sensitive packaging and novelty items.

Key terms

  • Thermochromic Pigments: Pigments that change color in response to temperature variations.
  • Phosphorescent Pigments: Pigments that absorb light and re-emit it over time, creating a glow-in-the-dark effect.

Common trap

Confusing thermochromic and phosphorescent pigments: Remember that thermochromic pigments change color with temperature, while phosphorescent pigments glow in the dark after being charged with light.

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