```html Year 8 Lesson: Finishing Techniques - Lacquers, Oils, and Modern Coatings

Year 8 Lesson: Finishing Techniques - Lacquers, Oils, and Modern Coatings

Curriculum Links

ACTDEK023: Investigate characteristics and properties of a range of materials, systems, components, tools and equipment and evaluate the impact of their use.

ACTDEP027: Use learning from prior knowledge to develop new solutions.

ACSF Alignment: Level 3 reading and learning skills through interpreting technical information and applying knowledge to practical scenarios.

Reading: Finishing Techniques - Lacquers, Oils, and Modern Coatings

Finishing techniques are essential in woodworking and design to protect materials, enhance appearance, and ensure durability. This lesson covers traditional and modern finishes like lacquers, oils, and coatings such as polyurethane. These techniques help prevent damage from moisture, UV light, and wear.

Lacquers are evaporative finishes made from nitrocellulose or acrylic resins dissolved in solvents. They dry quickly by evaporation, forming a hard, glossy protective layer. Commonly used on furniture and musical instruments for a smooth, durable surface. Application: Sand the wood, apply thin coats with a brush or spray, allow drying between coats. Advantages: Fast-drying, high gloss. Disadvantages: Can yellow over time, requires good ventilation due to fumes.

Oils, such as linseed oil, tung oil, or Danish oil, are penetrating finishes that soak into the wood fibers. They enhance the natural grain and provide water resistance without forming a thick surface film. Application: Apply with a cloth, let soak, wipe excess, repeat for multiple coats. Advantages: Easy to apply, natural look. Disadvantages: Longer drying time, less protection than coatings.

Modern coatings include varnishes like polyurethane (oil-based or water-based), which cure to form a tough, plastic-like film. They offer excellent protection against scratches and moisture. Application: Similar to lacquers, but often brushed on in thicker coats. Advantages: Durable, versatile. Disadvantages: Can be tricky to apply without bubbles or dust. (Word count: 350)

Spelling Bank

Here are 20 words from the reading for spelling practice (click to hear the word and a longer sentence with context and meaning):

Example Sentences

  1. The word finishing means completing the surface. In the lesson, finishing techniques protect wood.
  2. The word techniques means methods. In the reading, techniques include lacquers and oils.
  3. The word essential means necessary. In the context, essential for durability.
  4. The word woodworking means crafting with wood. In the lesson, woodworking and design.
  5. The word protect means safeguard. In the reading, protect materials from damage.
Fill in the Blanks (Using words from the reading)
1. Finishing __________ are essential in woodworking.
✔✘ Attempts remaining: 2
2. Lacquers are evaporative __________ made from resins.
✔✘ Attempts remaining: 2
3. Oils are penetrating finishes that enhance the natural __________.
✔✘ Attempts remaining: 2
4. Modern coatings like __________ offer excellent protection.
✔✘ Attempts remaining: 2
5. Lacquers dry quickly by __________.
✔✘ Attempts remaining: 2
6. Oils provide water __________ without a thick film.
✔✘ Attempts remaining: 2
7. Coatings cure to form a tough, plastic-like __________.
✔✘ Attempts remaining: 2
Multiple Choice Questions
1. What type of finish dries by evaporation and forms a hard, glossy layer?
Attempts remaining: 2
2. Which finish penetrates the wood and enhances the natural grain?
Attempts remaining: 2
3. Modern coatings like polyurethane are known for being:
Attempts remaining: 2
4. What is an advantage of lacquers?
Attempts remaining: 2
5. Oils are applied with a:
Attempts remaining: 2
6. A disadvantage of modern coatings is:
Attempts remaining: 2
7. Finishing techniques prevent damage from:
Attempts remaining: 2
Correct: 0
Wrong: 0
Resit test to get 100%

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