CARAMEL SAUCES

I WANT TO PUT CARAMEL SAUCES IN THE CANNING JARS & SELL IT TO THE CUSTOMERS BUT I DON'T KNOW HOW TO PREPARE FOR IT. I TRIED TO PUT CARAMEL'S CANNING JARS IN THE PRESURE COOKER & COOK FOR 10 MINUTES BUT IT DIDN'T LOOK GOOD. WOULD YOU TELL ME HOW TO PREPARE THE CANNING JARS FOR CARAMEL SAUCES? THANKS,