Combine tomatoes, celery, onion, green pepper and salt. Let stand overnight in refrigerator.
Drain in colander, but do not press vegetables.
Place vegetable mixture in a large kettle and add sugar, brown sugar, pepper, mixed pickling spices tied in a cheesecloth bag, and the vinegar. Bring to a boil.
Reduce heat and simmer, uncovered, for 15 minutes.
Ladle into jars. Seal. Process in a boiling water bath for 10 minutes.