Meaning & use
blue value
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Meanings
nouncountabletechnicalchemistry
A number that shows how much blue color a liquid or substance has, often measured in a test.
Grammar: Countable: you can say a blue value or the blue values.
Patterns
- measure the blue value of something
- a high/low blue value
The scientist measured the blue value of the water sample to check for pollution.
A high blue value in the solution showed that the dye was very concentrated.
The blue value dropped after the chemical was added, so the color became weaker.
nouncountabletechnicalchemistry
A score or rating in a color test that tells how strongly a material absorbs blue light.
Grammar: Countable and often used with of: the blue value of the sample.
Patterns
- the blue value of a sample
- increase/decrease the blue value
The lab report listed the blue value of each sample next to its pH.
Researchers compared the blue value of the new fabric with the old one.
If the blue value is too low, the test may need to be repeated.
Word forms
| plural | blue values |
|---|
Common combinations
- measure the blue value
- They measured the blue value before and after heating the mixture.
- high blue value
- A high blue value usually means there is a lot of blue dye present.
- low blue value
- The low blue value told them the color was fading.
- blue value test
- The blue value test is quick and does not need expensive equipment.
- calculate the blue value
- Students learned to calculate the blue value from the light readings.
Synonyms and how they differ
- color index
- A broader term for any number that describes color, not just blue.
- absorbance
- A more general measurement of how much light a substance takes in, often used in the same lab context.
Word family
Commonly confused: blue value or blue book?
blue value vs blue book
A blue book is a book with a blue cover, often used for exams; it has nothing to do with color measurement.
Practice
In a chemistry lab, what does a high blue value usually mean?
Choose one answer.
A high blue value means there is more blue color in the sample. The other options describe different properties, not color strength.
Make it your own
Write a sentence using “blue value”, then check it and compare it with the examples above.