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Natural fibre products Quiz 13

Theme: Natural Fibre Products NFP Quiz 13 Natural fibre products Quiz 13

Natural fibre products Quiz 13

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Question 1 of 10

1. Question
1. What are the three main rock types from which natural ground calcium carbonate (GCC) is derived?
- A) Chalk, Limestone, Marble
- B) Granite, Basalt, Sandstone
- C) Quartz, Feldspar, Mica
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Question 2 of 10

2. Question
2. Which property of GCC makes it especially suitable for high-speed coating machines?
- A) High abrasivity
- B) Low brightness
- C) Favourable rheological behaviour
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Question 3 of 10

3. Question
3. What is the primary reason for using dispersants in GCC slurries?
- A) To prevent sedimentation and flocculation
- B) To increase brightness
- C) To reduce particle size
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Question 4 of 10

4. Question
4. Which crystalline form of PCC has a needle-like shape and high aspect ratio?
- A) Calcite
- B) Vaterite
- C) Aragonite
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Question 5 of 10

5. Question
5. What is the typical ISO brightness range for PCC and GCC pigments?
- A) 93–96%
- B) 70–80%
- C) 60–70%
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Question 6 of 10

6. Question
6. Which pigment is known for its extremely high refractive index and can be used to enhance opacity in coatings?
- A) Talc
- B) Kaolin
- C) Titanium dioxide
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Question 7 of 10

7. Question
7. What is the main challenge when dispersing talc into water for slurry production?
- A) High density
- B) Its hydrophobic nature and lamellarity
- C) Low brightness
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Question 8 of 10

8. Question
8. In offset printing, what benefit does talc provide when used in coating formulations?
- A) Increases gloss
- B) Reduces ink rub-off and abrasivity
- C) Enhances water retention
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Question 9 of 10

9. Question
9. Which form of titanium dioxide pigment is more stable and has a higher refractive index?
- A) Anatase
- B) Rutile
- C) Leucoxene
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Question 10 of 10

10. Question
10. Why is it important to consider pigment volume rather than mass when formulating with TiO₂?
- A) TiO₂ is less dense than other pigments
- B) TiO₂ has a higher specific gravity, affecting coating thickness
- C) TiO₂ is more abrasive
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This page has been updated 07.01.2026

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