The National Center for Home Food Preservation National Center for Home Food Preservation's guidelines canning instructions Canned tomato sauce Tomato Sauce Extra acidification is required to be safe http://nchfp.uga.edu/how/can_03/tomato_sauce.html safe ways to process tomato sauce http://nchfp.uga.edu/how/can_03/tomato_sauce.html http://nchfp.uga.edu/how/can_03/tomato_sauce.html Tomato Sauce http://nchfp.uga.edu/how/can_03/tomato_sauce.html National Center for Home Food Preservation