* Sodium bicarbonate (baking soda) is a mild alkali. While it can be used for cleaning and deodorizing, it's not generally used to soften or enhance fabrics.
* Soaking plain t-shirts in baking soda won't offer any significant benefits. It won't make them softer, whiter, or less likely to shrink.
* It could even be detrimental. Soaking for too long or using too concentrated a solution could potentially damage the fabric or cause discoloration.
Alternatives for caring for plain t-shirts:
* Washing with mild detergent: Use a gentle detergent designed for delicate fabrics.
* Using fabric softener: Fabric softener can help make t-shirts softer and reduce static.
* Washing in cold water: Cold water helps prevent shrinkage and fading.
* Air drying: Air drying t-shirts helps preserve their softness and shape.
If you're looking for a specific purpose for your t-shirts, like removing stains or odors, you might find other solutions more effective than baking soda:
* Vinegar for stains and odors: White vinegar is a natural stain remover and odor neutralizer.
* Bleach for whitening: Use bleach only on white t-shirts and follow the instructions carefully.
In short, soaking plain t-shirts in a sodium bicarbonate solution is not recommended. There are other, more effective ways to care for and enhance your t-shirts.