Other

Miura Co., Ltd.

Miura Institute of Research & Developement Co., Ltd.

Katsufumi Isshiki

Yoshitami Tsubota

Sadatoshi Takechi

Takeshi Fukumura

Kazuhiro Tachino

Masazumi Yamashita

Junichi Nakajima

Yuuji Ukena

Tomisada Kubota

A harness indicator is highly reactive to a trace amount of Ca,, and is slow to degrade in a high temperature environment of greater than 50&deg; C. In one embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of Mg-EDTA. In another embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of anhydrous Mg-EDTA. In another embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of anhydrous Mg-EDTA and potassium sorbate. In a further embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of Mg-EDTA and potassium sorbate. In a further embodiment, the hardness indicator contains EBT, a pH buffer, and a masking agent as main components, and an admixture of potassium sorbate.

Hardness indicator

Colorimeter

Growing community of inventors

Matsuyama, Japan

Katsufumi Isshiki