H12: No Comma Between Non-Coordinate Adjectives: Don’t put a comma between non-coordinate adjectives. See the 7th rule down at the following: http://oer2go.org/mods/en-boundless/www.boundless.com/writing/textbooks/boundless-writing-textbook/overview-of-english-grammar-punctuation-and-mechanics-251/commas-31/common-comma-mistakes-139-10368/index.html
She ate five, free pancakes that morning. (Incorrect)
She ate five free pancakes that morning. (Correct)
(“five” and “free” work together to modify “pancakes.”)
See H6 for where commas are used with adjective.