Biological pigment of the tetrapyrroles is their connection in the biological oxidation process. Tetrapyrroles have a major role in electron transport and act as a replacement for many enzymes. They also have a role in the pigmentation of the marine organism's tissues. Melanin is a class of compounds that serves as a pigment with different structures responsible for dark, tan, yellowish / reddish pigments in marine animals. It is produced as the amino acid tyrosine is converted into melanin, which is found in the skin, hair, and eyes. Derived from aerobic oxidation of phenols, they are polymers. There are several different types
Fugitive pigment for a number of reasons: availability and cost of pigments; being more concerned with the appearance of colors available only with fugitive pigments than with permanence; ignorance regarding the volatility of the pigments; or the desire to have a painting change in appearance over time. Fugitive pigment Fugitive pigments are impermanent pigments that lighten, darken, or otherwise change in appearance or physicality over time when exposed to certain environmental conditions, such as light, temperature, humidity, or pollution. Fugitive pigments are present in types of paint, markers, inks etc., which are used for temporary applications. Fugitive inks which washed away when