- BrandАртерия Интер Фреш
- Country of manufactureRussia
When making a silica gel - indicator, a small amount of color indicators of moisture are added to it - substances that change their color when the degree of hydration changes. Typically, divalent cobalt salts such as cobalt chloride are used as such a substance. In a dehydrated state, this salt has a dark blue color, when hydrated it changes color to light pink.