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