acid dye
C1-C2Technical / Specialized
Definition
Meaning
A type of dye that is applied to textiles (especially wool, silk, nylon) from an acidic bath.
A class of synthetic dyes containing acidic groups, which bond to fibers via ionic interactions. The term can also refer more broadly to any dye requiring an acidic medium for application.
Linguistics
Semantic Notes
Primarily a technical term in chemistry, textile manufacturing, and arts/crafts. It is a hyponym of 'dye' and is often contrasted with 'basic dye' or 'reactive dye'. The 'acid' refers to the dyeing process medium, not the dye's corrosive properties.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or definitional differences. Spelling is identical.
Connotations
Identical technical connotations in both varieties.
Frequency
Equally low-frequency in specialized contexts in both regions. Unlikely to be encountered in general discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
[substance] is an acid dye[artist/technician] used an acid dye on [material][material] was dyed with an acid dyeVocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Used in procurement and manufacturing specifications for textiles and carpets.
Academic
Used in chemistry, materials science, and textile engineering papers and textbooks.
Everyday
Virtually never used. A crafter might say 'I need a dye for this silk scarf' rather than specify 'acid dye'.
Technical
Core usage. Precise term in industrial dyeing, histology (for staining), and art conservation.
Examples
By Part of Speech
verb
British English
- The technician will acid-dye the sample wool.
- We need to acid-dye these fibres for the test.
American English
- The lab acid-dyes the fabric under controlled conditions.
- They acid-dyed the nylon to achieve a vibrant red.
adjective
British English
- The acid-dye process requires careful pH control.
- She purchased an acid-dye kit for her project.
American English
- He followed the standard acid-dye procedure.
- The results of the acid-dye test were conclusive.
Examples
By CEFR Level
- Acid dyes are often used for dyeing wool and silk.
- The vibrant colour was achieved using a special acid dye.
- The fastness of the colour depends on the specific acid dye and the mordant used.
- Unlike reactive dyes, traditional acid dyes form ionic bonds with the amino groups in protein fibres.
Learning
Memory Aids
Mnemonic
Think: ACID DYE = Apply to Cloth In acidic water. Dyes Fabric Easily.
Conceptual Metaphor
DYE IS A KEY that fits a specific LOCK (the fiber), requiring an ACIDIC ENVIRONMENT to turn.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'кислотная краска' which suggests a corrosive paint. The correct term is 'кислотный краситель'.
- Do not confuse with 'acidic colour' which refers to a bright, garish visual effect, not a chemical dye.
Common Mistakes
- Using 'acid dye' to refer to any brightly coloured dye.
- Pronouncing 'dye' as /daɪ/ (correct) vs. /di:/ (incorrect, that's 'die').
- Confusing 'acid dye' (noun phrase) with 'to dye acidly' (not a standard phrase).
Practice
Quiz
What is the primary characteristic of an acid dye's application?
FAQ
Frequently Asked Questions
Not necessarily. 'Acid' refers to the pH of the dyeing bath, not to the dye being corrosive. Many are safe for craft use, though safety data sheets should always be checked.
Typically, no. Acid dyes are designed for protein fibres (wool, silk) and some synthetics like nylon. Cotton, a cellulose fibre, requires different dye classes like fibre-reactive or direct dyes.
They are chemically different classes. Acid dyes are designed for binding to specific textiles and are generally more lightfast and washfast. Food colourings are approved for consumption and may not bond permanently to fabric.
The name originates from the historical use of acidic substances like vinegar in the dyeing process to help the colour fix to the fibre. Chemically, the dye molecules often contain sulphonic acid groups and are applied in an acidic medium.