Hansen Coloring Method

The Hansen staining method is a staining method developed in 1903 by Norwegian scientist F.C. Hansen. This staining method is used to determine the presence of iron in various materials such as ores, minerals, alloys, etc.

The principle of the method is that the iron in the sample is oxidized when heated to 450 degrees Celsius in the presence of a solution of ferrous sulfate and ammonia. The resulting iron oxide turns the sample blue.

The Hansen method is one of the most common methods for determining the iron content of samples, and it is widely used in the metallurgical industry to control the quality of materials. In addition, this method is also used in scientific research to analyze the composition of minerals and ores.