I have collected over 10000 tomato seeds, for the first time, this year. In order to collect tomato seeds to be used in your garden the following year, you have to first ferment them.
A tomato seed is typically encased in a gel sac. The gel sac prohibits germination. Think about it. The tomato is mostly water and the seeds sit in the tomato at a cozy 80 degrees or more. The tomato itself is a perfect environment for seed germination. The tomato naturally suppresses germination by encasing the seeds. When a tomato rots, it typically is fermenting. The get sac gets dissolved and the seed is now free to germinate. You have to create this process so the tomato seeds will be ready for germination when you need them.
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Step 1: The Jar, the Gel Sac, and Tomato Seeds
The get sac is the sac that surronds a tomato seed. You can see them easily with the naked eye. They easiest way to collect the seeds is to cut up a tomato and scrape the seeds and the tomato gel and liquid into a large bowl.
You WANT the tomato liquid and gel mixed with your seeds. The seeds need to ferment in the liquid. Try and keep out larger pieces of tomato if you can. The pictures will show you the seeds surrounded in a gel sac and basic other steps.