Chemistry of Dye Precursors

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Questions and Answers

What is the primary function of a coupler in the hair dyeing process?

To activate the developer
To form the color of the dye (correct)
To oxidize the dye precursor
To bind the dye to the hair shaft

What is the role of the developer in the hair dyeing process?

To condition the hair after dyeing
To activate the coupler
To mix with the dye precursor to form the color
To oxidize the dye precursor (correct)

What is the purpose of a dye precursor in the hair dyeing process?

To bind the dye to the hair shaft
To condition the hair before dyeing
To form the color of the dye
To react with the coupler to form the color (correct)

What is the result of the reaction between the dye precursor and the coupler?

<p>The formation of the final color of the dye (A)</p> Signup and view all the answers

What is the primary function of the base in the hair dyeing process?

<p>To form the base tone of the dye (B)</p> Signup and view all the answers

Study Notes

Dye Precursor and Dyeing Process

Dye precursor is a colorless compound, typically an aromatic compound with functional groups in the para-position (e.g. p-diamines or p-aminophenols).
Dye precursor is used in permanent dyes.
The dyeing process in hair involves a combination of three components:
- Dye precursor
- Developer
- Coupler
The base is also involved in the dyeing process.
Oxidizing agents, alkaline chemicals, and couplers are also involved in the process, but their exact roles are not specified.

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Description

This quiz covers the properties and characteristics of dye precursors, including their functional groups and aromatic compounds. Learn about the chemistry behind these colorless compounds.