As a food preservation expert with extensive knowledge in canning techniques, I can tell you that the process of canning tomatoes in a hot water bath, also known as water bath canning, typically takes about 35 to 45 minutes for a standard pint jar. However, this time can vary depending on the size of the jar and the altitude at which you are canning. It's crucial to follow the recommended processing times to ensure the safety and quality of the canned tomatoes.

read more >>

As each jar is filled, stand it on rack in canner of hot, not boiling, water, which should cover jars by 1 to 2 inches. (Add additional water if necessary.) Put cover on canner, and bring water to a boil. Process quarts for up to 45 minutes (40 minutes for pints) at a gentle but steady boil.read more >>