the preservatives keeps them from becoming soft and forgot the name of the brand that does not use
My favorite is this one... https://www.muirglen.com/products/?category=canned_tomatoes
it is also recommended by America’s Test Kitchen for great flavor!
whoops I checked website and believe it or not!! they too have calcium chloride, that is what keeps them firm despite any cooking -
Oh sorry! Well it is a good brand otherwise...
Food 52 does say Pomi on an article...
Carmelina San Marzano tomatoes do not have preservatives.
POMI they are packed in a box. Really good quality and flavor.
Imported Italian tomatoes have no additives other than possibly salt.
thank you everyone for my answers!!!