How to tan leather
  • 1. What is the primary purpose of tanning leather?
A) To change its color
B) To prevent decomposition
C) To make it shiny
D) To remove all hair
  • 2. Which of these is NOT a common tanning agent?
A) Chromium salts
B) Vegetable tannins
C) Aluminum salts
D) Sugar
  • 3. What is the first step in most tanning processes?
A) Dyeing
B) Curing
C) Finishing
D) Tanning
  • 4. What does 'curing' primarily involve?
A) Stretching the leather
B) Adding color
C) Softening the leather
D) Preserving the hide
  • 5. Which curing method uses salt?
A) Air drying
B) Salt curing
C) Pickling
D) Smoking
  • 6. What is 'deliming' in leather tanning?
A) Removing lime
B) Adding fat
C) Removing hair
D) Adding lime
  • 7. What is a common vegetable tanning material?
A) Petroleum
B) Plastic
C) Oak bark
D) Cement
  • 8. Which type of tanning is known for its speed and stability?
A) Oil tanning
B) Brain tanning
C) Vegetable tanning
D) Chrome tanning
  • 9. What color is leather typically after chrome tanning?
A) Brown
B) Black
C) Blue-grey
D) Red
  • 10. What is 'fatliquoring' used for?
A) Waterproofing the leather
B) Hardening the leather
C) Adding color to the leather
D) Softening the leather
  • 11. What is staking in leather making?
A) Applying a finish
B) Removing the hair
C) Applying dyes
D) Mechanical softening
  • 12. What does the term 'crust' refer to in leather production?
A) Partially dried leather
B) Raw hide
C) Leather scraps
D) Finished leather
  • 13. Which of these is a type of fish oil used in tanning?
A) Olive oil
B) Cod liver oil
C) Vegetable oil
D) Motor oil
  • 14. What is the purpose of 'sammying'?
A) Removing wrinkles
B) Reducing moisture
C) Adding moisture
D) Adding color
  • 15. What is a common method of applying dyes to leather?
A) Drum dyeing
B) Spray painting
C) Airbrushing
D) Pouring
  • 16. What does 'full grain' leather refer to?
A) Top layer of hide
B) Bottom layer of hide
C) Split hide
D) Reconstituted leather
  • 17. Which tanning method is known for producing very soft and supple leather?
A) Vegetable tanning
B) Brain tanning
C) Chrome tanning
D) Mineral tanning
  • 18. What is the main difference between top-grain and split leather?
A) Split leather is more expensive
B) Split leather is stronger
C) Top-grain includes the grain layer
D) They are the same thing
  • 19. What is 'case hardening' in leather?
A) Adding metal
B) Hardening the entire leather
C) Waterproofing
D) Dry outer layer
  • 20. What is commonly used to neutralize leather after vegetable tanning?
A) Nitric acid
B) Hydrochloric acid
C) Sodium bicarbonate
D) Sulfuric acid
  • 21. What is 'boarding' leather?
A) Preparing the leather for dyeing
B) Creating a grain pattern
C) Cutting the leather
D) Sewing the leather
  • 22. What type of leather is traditionally used for saddles and belts?
A) Oil-tanned
B) Brain-tanned
C) Chrome-tanned
D) Vegetable-tanned
  • 23. What does 'retanning' involve?
A) First tanning process
B) Dyeing process
C) Second tanning process
D) Finishing process
  • 24. What is the purpose of using a glazing jack?
A) Stretching the leather
B) Polishing the leather
C) Cutting the leather
D) Sewing the leather
  • 25. Which tanning method relies on aldehyde compounds?
A) Oil tanning
B) Aldehyde tanning
C) Chrome tanning
D) Vegetable tanning
  • 26. What is the purpose of 'crusting' the leather?
A) Removing hair from the leather
B) Adding color to the leather
C) Drying the leather
D) Making the leather waterproof
  • 27. What tool is used to split leather into different thicknesses?
A) Embossing machine
B) Sewing machine
C) Splitting machine
D) Cutting machine
  • 28. What is the purpose of using wax on finished leather?
A) Enhancing shine and protection
B) Softening the leather
C) Removing stains
D) Adding color
  • 29. Which type of tanning is the most environmentally friendly?
A) Chrome tanning
B) Aldehyde tanning
C) Vegetable tanning
D) Synthetic tanning
  • 30. What is 'buffing' leather used for?
A) Adding color
B) Removing moisture
C) Stretching the leather
D) Smoothing the surface
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