Rock salt naturally absorbs moisture out of the air, making it a great choice to use as a dehumidifier. To make a rock salt humidifier, you'll need a large bag of rock salt (also sometimes referred to as sodium chloride) and two 5-gallon buckets. You should be able to find both at a hardware store.
They dilute the water and hinder escape of water molecules into the air. The rate of return of water molecules to the liquid surface is proportional to their concentration in the gas, where there are no salt ions to interfere.
Use dehumidifiers and air conditioners, especially in hot, humid climates, to reduce moisture in the air, but be sure that the appliances themselves don't become sources of biological pollutants. Raise the temperature of cold surfaces where moisture condenses. Use insulation or storm windows.
If solving your moisture problem is something you'd like to do inexpensively, rock salt may be your answer. Because rock salt is hygroscopic it absorbs moisture from the air. If your plan is to get rid of the humidity in a damp basement, start with a 50-pound bag of sodium chloride to make your rock salt dehumidifier.
Of the seven household desiccants they tested, uncooked rice was the least absorbent, behind cat litter, couscous, oatmeal, and instant rice. Unless you're willing to spend serious money, leaving your phone on a shelf to air dry, they suggested, may be your best option.
The answer is that a dehumidifier is better than Damprid in an RV. There are two primary reasons for this. The first is that in order for any dehumidifier to work you need some air flow. Damprid creates no air flow but a dehumidifier does.
Rock salt is highly effective for dehumidifying. Rock salt or NaCl is a hygroscopic material, meaning it both draws and stores water and works much like an electric humidifier. It's natural, non-toxic, cheap, easy to find, and easy to work with—not to mention, no electricity is needed!
Some of the things you can use include rock salt, DampRid, Dri-Z-Air, baking soda, and silica gel desiccants. You can also use other things such as a fan, air conditioner, and space heater. Venting your home, removing indoor plants, cooking outdoors, and taking shorter showers will also help remove excess moisture.
When the humidity level is higher inside than outside, you can reduce the humidity in your home by opening a window. Opening the window increases the circulation of dry air in your home and prevents excess moisture from damaging various elements.
humidity is higher than 75%, the solution absorbs the air moisture and the salt is dissolving. Such systems may be informally called "relative humidity buffers". They are useful for hygrometer calibration or for making a constant humidity aerial baths for long term weathering of devices or materials.
Place the packet in the space you want dehumidified. Insert it in the bottom of an empty container before filling the container with dry goods. In larger spaces (like pantries or boxes), tape the packet to a inside wall or surface using a rolled piece of masking tape.