Extract from gall nuts used as a fixative in dyeing Crossword Clue

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Understanding Today's Crossword Puzzle

Today's crossword clue "Extract from gall nuts used as a fixative in dyeing" leads us to the answer "TANNIC ACID." Let's delve into why this seemingly complex chemical compound fits perfectly as the solution to this clue:

• Extract from gall nuts: Gall nuts, also known as Aleppo galls, are produced by gall wasps on oak trees. Tannic acid is commonly extracted from these galls, making a strong connection to the clue.
• Fixative in dyeing: Tannic acid has astringent properties that make it an ideal fixative in dyeing processes. It helps bind the dye to the fabric, ensuring long-lasting color.
• Chemical composition: Tannic acid is a type of polyphenol with multiple hydroxyl groups that can form strong complexes with various substances, including dyes.
• Historical significance: The use of tannic acid in dyeing dates back to ancient times, where it was extracted from natural sources like gall nuts to improve color retention in textiles.

Considering the role of tannic acid in dyeing processes and its extraction from gall nuts, it becomes evident why this compound perfectly matches the clue provided in today's crossword puzzle.

 That crossword clue published 1 time/s & has 1 answer/s. 

Crossword	Date	Answer
The Times Specialist	17 May 2020	TANNIC ACID