Chinese: 明礬(硫酸鋁鉀)

English: Potassium alum

Chemical formula: KAl(SO4)2·12H2O

Category: Mineral

 

Potassium alum, also known as potash alum or potassium aluminum sulfate, is a naturally occurring mineral salt that has been used for centuries for a variety of purposes. It is a type of double salt that is made up of aluminum sulfate and potassium sulfate.

 

Potassium alum is commonly used as a natural deodorant, as it has antimicrobial properties that help to prevent the growth of odor-causing bacteria. It is also used in a variety of other applications, including water purification, papermaking, and tanning.

 

Potassium alum is generally considered safe for use in most applications, although it can be harmful if ingested in large quantities. Ingesting large amounts of potassium alum can cause gastrointestinal irritation, and it should be kept out of reach of children and pets.

 

In the fashion industry, potassium alum can be used as a mordant in fabric dyeing, which means it helps to fix the dye to the fabric and improve its colorfastness. When used as a mordant, potassium alum is typically dissolved in hot water and added to the dye bath along with the fabric.

 

明礬，也稱為硫酸鋁鉀，是天然存在的礦物鹽，幾個世紀以來一直用於各種用途。 它是一種複鹽，由硫酸鋁和硫酸鉀組成。

 

明礬通常用作天然除臭劑，因為它具有抗菌特性，有助於防止引起異味的細菌滋長。它還用於各種應用，包括水淨化、造紙和製革。

 

明礬在大多數應用中安全，但大量攝入可能有害。攝入大量明礬會引起胃腸道刺激，因此應將其放在兒童和寵物接觸不到的地方。

 

於染布方面，明礬可用作織物染色的媒染劑，有助於將染料固著在織物上，提高織物的色牢度。當用作媒染劑時，明礬通常溶解在熱水中並與織物一起添加到染液中。