Water glassing eggs involves submerging clean, unwashed, eggs in a pickling lime and water solution to seal off the shell and preserve them for 12-18 months. The result is perfectly fresh, unspoiled eggs, just like they were the day the hen laid them. Sometimes properly water glassed eggs are still fresh even after two years. Homestead folks have been using this preservation method since the 1800s to capitalize on the springtime egg abundance year round.