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