How to understand your pigmetns

One can find their pigments' many physical and chemical properties by doing the following test. First, one can find out the magnetic properties of the pigments. If a magnet sticks to the pigment bottle, it likely contains metal compounds, such as Iron oxides, particularly Black Iron Oxide (CI 77499), also known as magnetite. This does not inherently imply health risks, as synthetic iron oxides used in approved pigments are safe and regulated. One can perform the “water test” by spilling a drop of pigment into a class of water (no shaking or stirring is needed). If the pigment floats and...