Metal powder, ultraviolet ray curable ink jet composition and recorded object

A metal powder constituted from metal particles, each of the metal particles comprising;

• a base particle having a surface;
• and
• a metal material constituting at least the surface of the base particle;
• wherein the base particle is subjected to a surface treatment with a fluorine-containing surface treatment agent, and
• wherein the fluorine-containing surface treatment agent has a chemical structure selected from at least one of the following formulas:
• PO(CF3(CF2)m(CH2)l)n(OH)3-n, wherein “n” is an integral number of 1 to 3, “m” is an integral number of 2 to 18, and “l” is an integral number of 1 to 18;
• PO(CF3(CF2)m(CH2O)l)n(OH)3-n, where “n” is an integral number of 1 to 3, “m” is an integral number of 1 to 3, and “l” is an integral number of 1 to 18;
• PORn(OH)3-n, where “R” is CF3(CF2)m-, CF3(CF2)m(CH2CH2O)l-, CF3(CF2)mO- or CF3(CF2)m(CH2)lO-, “n” is an integral number of 1 to 3, “m” is an integral number of 2 to 4, and “l” is an integral number of 1 to 18;
• and
• CF3(CF2)5(CH2)2O(P)(OH)(OCH2CH3).