C33 Color Theory and Color Matching 2 — Questions and Answers
Question 1: When color matching an existing painted surface, what is the most accurate method?
- Matching by eye under store lighting
- Using a spectrophotometer to scan the existing color (Correct answer)
- Choosing the closest chip from a color fan deck
- Blending universal tints into white paint by hand
Correct answer: Using a spectrophotometer to scan the existing color
A spectrophotometer measures the light reflectance of the existing color and generates a precise formula, providing the most accurate color match.
Question 2: What phenomenon causes paint colors to appear significantly different under different light sources?
- Color bleed
- Metamerism (Correct answer)
- Undertone shift
- Batch variance
Correct answer: Metamerism
Metamerism causes colors to appear differently under varying light sources (daylight, incandescent, fluorescent), which is why paint should be evaluated under the actual room lighting.
Question 3: Why should a paint sample be applied to the actual wall before purchasing full quantities?
- To test paint adhesion on the surface
- To check the consistency of the paint batch
- To evaluate the true color under the room's specific lighting and surroundings (Correct answer)
- To determine the required number of coats
Correct answer: To evaluate the true color under the room's specific lighting and surroundings
Applying a sample to the actual wall lets you see the color under real lighting conditions alongside existing furnishings before committing to large quantities.
Question 4: When mixing custom colors, what approach produces the most consistent and repeatable results?
- Mix by eye until it looks right
- Follow a precise formula measured by weight or volume (Correct answer)
- Add tints gradually until close enough
- Use only manufacturer pre-mixed colors
Correct answer: Follow a precise formula measured by weight or volume
A precise formula by weight or volume ensures consistent, repeatable results and allows accurate replication if additional paint is needed later.
Question 5: Why is batch number (lot number) important when purchasing multiple cans of the same paint color?
- It tracks warranty claims
- It ensures color consistency between cans from the same production run (Correct answer)
- It identifies the paint's VOC content
- It determines the paint's shelf life
Correct answer: It ensures color consistency between cans from the same production run
Paint from different production batches can have slight color variations, so using the same batch number ensures color uniformity across an entire project.
Question 6: What technique best prevents 'lap marks' when rolling paint on a wall?
- Apply paint in short overlapping strokes and let each dry
- Maintain a wet edge and work systematically section by section (Correct answer)
- Apply two thin coats back-to-back before the first dries
- Use a very dry roller to feather the edges
Correct answer: Maintain a wet edge and work systematically section by section
Maintaining a wet edge ensures new paint always blends into wet paint rather than into an already-drying edge, preventing visible lap marks.
C33 Color Theory and Color Matching 2
When color matching an existing painted surface, what is the most accurate method?