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How to make paint from ochre, charcoal, and plant extracts - Exam
Contributed by: Kay
  • 1. What is ochre primarily composed of?
A) Aluminum sulfate
B) Calcium carbonate
C) Silicon dioxide
D) Iron oxide
  • 2. What determines the color of ochre?
A) Particle size
B) Added plant extracts
C) Moisture content
D) Type and amount of iron oxide
  • 3. What is the purpose of grinding ochre?
A) To remove impurities
B) To make it easier to mix
C) To create a finer pigment
D) To change the color
  • 4. What is charcoal made from?
A) Decomposed plants
B) Volcanic ash
C) Burnt organic material
D) Ground minerals
  • 5. Why is charcoal used as a pigment?
A) Creates a yellow color
B) Creates a red color
C) Creates a black color
D) Creates a blue color
  • 6. What form should charcoal be in for making paint?
A) Liquified
B) Chunks
C) Powdered
D) Sticks
  • 7. What is a common method for preparing charcoal for paint?
A) Baking in an oven
B) Boiling in water
C) Grinding with a mortar and pestle
D) Exposing to sunlight
  • 8. What is the purpose of a binder in paint?
A) To hold the pigment particles together
B) To add color
C) To make the paint dry faster
D) To prevent fading
  • 9. Which of these is a natural binder option?
A) Acrylic polymer
B) Egg yolk
C) Acetone
D) Mineral spirits
  • 10. What is gum arabic?
A) A natural gum used as a binder
B) A synthetic resin
C) A type of charcoal
D) A type of clay
  • 11. What is the role of water in traditional ochre paint?
A) To preserve the paint
B) To thin the paint
C) To add color
D) To act as a binder
  • 12. What is a mordant?
A) A grinding tool
B) A type of brush
C) A type of clay
D) A substance used to fix dyes
  • 13. Where do plant-based pigments come from?
A) Rocks, soil, and sand
B) Flowers, roots, and leaves
C) Animal bones and shells
D) Metals and minerals
  • 14. Which plant part is commonly used for red pigment?
A) Flowers
B) Leaves
C) Roots
D) Stems
  • 15. What is a common method for extracting pigment from plants?
A) Freezing
B) Burning
C) Boiling
D) Fermenting
  • 16. What should you do before using a plant extract as pigment?
A) Test for lightfastness
B) Add more water
C) Heat it to a high temperature
D) Grind it into larger particles
  • 17. What does lightfastness refer to?
A) Resistance to water damage
B) Ability to mix with other colors
C) Resistance to fading in light
D) How quickly the paint dries
  • 18. Which natural ingredient can be used as a preservative?
A) Sand
B) Salt
C) Sugar
D) Honey
  • 19. What consistency should the final paint ideally have?
A) Dry and powdery
B) Very watery
C) Chunky and thick
D) Smooth and spreadable
  • 20. What is a potential safety concern when working with natural pigments?
A) They are always completely safe
B) Possible allergic reactions
C) They can explode
D) They never stain
  • 21. Which tool is best for mixing small batches of paint?
A) Shovel
B) Palette knife
C) Leaf blower
D) Cement mixer
  • 22. What is a benefit of using natural pigments?
A) They are cheaper than all synthetic pigments
B) They are easier to work with than synthetic pigments
C) They are often environmentally friendly
D) They are always more vibrant than synthetic pigments
  • 23. What impacts the stability of paint made with natural ingredients?
A) Whether it was made on a Tuesday
B) Only the type of pigment used
C) Choice of binder and storage conditions
D) The air pressure during mixing
  • 24. What is a common support for painting with natural pigments?
A) Plastic
B) Canvas or paper
C) Metal
D) Glass
  • 25. Why should you store homemade paint in an airtight container?
A) To evaporate the water
B) To add more oxygen
C) To make the color brighter
D) To prevent drying out
  • 26. What is a benefit of aging ochre clay before processing it?
A) Reduces the color
B) Makes it easier to grind
C) It doesn't have any effect
D) Deepens the color
  • 27. What is the best water to use to thin out the paints?
A) Distilled water
B) Tap water
C) Vinegar
D) Salt water
  • 28. What safety precaution should you take when grinding charcoal into powder?
A) Wear a face shield
B) Wear a lab coat
C) Wear gloves
D) Wear a dust mask
  • 29. What is the result of adding too much binder?
A) Fading
B) Runny paint
C) Cracking
D) Becoming too light
  • 30. How do you dispose of leftover natural pigment paint?
A) Throw it in the trash
B) Pour it down the drain
C) Mix it with other paints
D) Check local regulations for pigment disposal
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