You can experiment with different types of salt such as sea salt iodized salt himalayan salt and other.
Table salt crystals growing.
First you need to start with hot water so this is an adult only step if needed.
Table salt crystals grown in 7 months.
Alum salt grows quickly sometimes making visible crystals within a few hours.
Table salt crystals have a cubic shape.
Though you can see from the above right photo we did not use all of our solution for our tray.
Iodized salt won t work as well but will still form crystals.
We microwaved about 2 cups of water for 2 minutes.
Now it s time to add the salt.
How to grow salt crystals table salt sodium chloride water clean clear container a piece of cardboard optional string and pencil or butter knife optional.
Instead of using a sponge try growing the crystals on another surface.
Making a super saturated solution for growing salt crystals.
Adding the vinegar and growing the crystals on a sponge alters the appearance a bit.
The biggest one is about 2cm in size.
So without some trick you ll never get big and relatively transparent crystals like ones at the photo above.
Epsom salt grows into smaller needle like crystals and faster than table salt.
Yellow substance is inclusions of the iron iii chloride.
You can buy it at a pharmacy.