Definition: Methods used to remove already formed contaminants from a stream of air, water, waste, product or similar. These techniques are called 'end-of-pipe' as they are normally implemented as a last stage of a process before the stream is disposed of or delivered. Source: GreenFacts.
The best canning tomatoes will be the varieties that Heinz and Campbell came out with over the last 70 odd years. Heinz 1350 and Heinz 1439 are two that come to mind and are readily available on the net. Both are determinate and heavy producers which helps a bit for processing.nd best to a fresh garden grown tomato is a well done home canned one---somewhere around last place comes the wintertime fakes offered at the local superstore. A few variables to consider: 1  Firmness after processing. 2  Taste after processing. 3  Size compared to neck size of the canning jar.
For this reason, if a person is looking for ways to decrease the acidity of his or her tomatoes, I would suggest buying only the ripest ones, and steering clear of anything less than fully ripe. Canned tomatoes are typically more acidic than fresh tomatoes due to the impact of the canning process. The pH of canned tomatoes can dip down into the 3.5 pH range. For this reason, avoiding canned tomatoes would be another recommendation if a person were trying to consume foods with less acidity.