I am new to this forum so please forgive duplicity if this has previously been discussed. I recently scored 1 dozen 1/2 gallon ball jars for $10 from a lady cleaning out an attic. They're in great shape. I checked with my local Cooperative Extension office, and they said that canning tomatoes in 2-qt jars is unsafe and I should therefore use the jars for decorative purposes only. I am certain there is info out there somewhere about processing times for 2 qt jars, as well as how much lemon juice I should add. Can anyone help me?