It won't reduce your processing time. It increases it to 85 mins. BWB and almost doubles the PC processing time too because of increased density.

Dave

Here is a link that might be useful: NCHFP - Whole or Halved Tomatoes in Tomato Juice

You don't really need to buy juice if the tomatoes are ripe. Here's how I do it:

Here is a link that might be useful: Canning Tomatoes: Why & How

The BWB processing time for canning whole or halved tomatoes (packed raw without added liquid) and just using the juice made by the tomatoes themselves is 85 min., not the 40-45 min. listed on the website.

Dave

Here is a link that might be useful: NCHFP - Canning tomatoes with no added liquid

Thanks for the info. Pickyouown.org has instructions but isn't always clear and in the case of adding tomato juice for canning liquid, it wasn't, in my opinion. Anyway, I processed for 85 minutes with the commercial tomato juice so we should be good to go!