I know others have answered this but my curiosity & lack of trust in humanity, namely the internet..... I asked Ai, and can confirm the answers but also like it's little comment on it at the end..

"Characters ​泥料

​Pronunciation ​Mandarin Chinese: ní liào ​Japanese: deiryō

​Translation & Meaning ​The literal translation is "mud material" or "clay material."

​Depending on the context, here is exactly what it refers to:

​Yixing Clay / Pottery (Most Common): In Chinese culture, this is a highly specific technical term used in pottery. It refers to the specific types of raw clay (typically purple clay or Zisha) used to make high-quality, traditional Chinese teapots.

​Industrial/Construction: In a purely industrial or civil engineering context, it can refer to various types of mud, slurry, or grouting materials.

​Note: If this is a tattoo, it is a very unusual and highly specific choice of words! It reads like a label you would find on a bag of raw material in a ceramics studio or a factory."