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