pasteurization by heating high temperature short time (HTST) pasteurization High Temperature Short Time (HTST) pasteurization is one of the most common methods of pasteurization , which uses metal plates and hot water to raise milk temperatures to at least 72° C (161° F) for not less than 15 seconds, followed by rapid cooling. http://www.langual.org/langual_thesaurus.asp?termid=J0178 HTST