PROBLEM TO BE SOLVED: To solve problems, for example, that a testing soil mainly formed of a blood component is not easily attached to a fluororesin such as a polytetra-fluoroethylene (PTFE) which is high hydrophobic, and when adipose is used as a testing soil, it is hard to detect residue after completion of cleaning, and there is no testing soil which allows a user to create a turbid state of adipose and dye having high affinity and determine the state by visual inspection.SOLUTION: The testing soil of the invention is a substance formed by mixing a carotenoid dye to adipose which is solid state at normal temperature. The testing soil is easily attached to a fluororesin, and allows a user to evaluate cleaning state by visual inspection by a mixture formed by coloring adipose which is contamination which is not easily cleaned with a dye.COPYRIGHT: (C)2015,JPO&INPIT【課題】血液成分を主成分としたテストソイルは、高疎水性のポリテトラフルオロエチレン(PTFE)などのフッ素系樹脂に付着しにくいという問題がある。また、脂肪をテストソイルとした場合は、洗浄後の残留物を検出することが難しい。脂肪と親和性が高い色素との混濁状態を作成し容易に目視で判定できるテストソイルは無かった。【解決手段】本発明のテストソイルは、常温で固体である脂肪に、カロテノイド系色素を混合した物質である。フッ素系樹脂にも付着しやすく、洗浄の困難な汚染物である脂肪を色素で着色した混和物により目視による洗浄評価しやすいテストソイルとなっている。
