Modified Sulfur and Production Method Thereof

A method of producing modified sulfur, comprising:

• a first step of mixing sulfur and an unsaturated fatty acid-based modifier;
• a second step of introducing the resulting mixture into a reactor and melting the same by heating at 100° C. or more and 130° C. or less;
• a third step of raising a temperature of the melted mixture to 130° C. or more and 200° C. or less;
• and
• a fourth step of terminating the reaction when a viscosity of the melted mixture reaches 6,000 cP or more and 25,000 cP or less at 160° C.