Editing Ammonia solution (section)

=== Furniture darkening ===
In furniture-making, [[ammonia fuming]] was traditionally used to darken or stain wood containing [[tannic acid]]. After being sealed inside a container with the wood, fumes from the ammonia solution react with the tannic acid and iron salts naturally found in wood, creating a  rich, dark stained look to the wood. This technique was commonly used during the [[Arts and Crafts movement]] in furniture – a furniture style which was primarily constructed of oak and stained using these methods.<ref>{{cite book |first1=Shayne |last1=Rigers |first2=Nick |last2=Umney |chapter=Acidic and alkaline stains |chapter-url=https://books.google.com/books?id=djtw17MPrTsC&pg=PA618 |pages=618–9 |title=Wood Coatings: Theory and Practice |publisher=Elsevier |location=Amsterdam |isbn=978-0-444-52840-7|date=2009-08-12 }}</ref>