I tried it once w/ grated soap...it was okay-ish. I added lemon juice and it was not so okay. It still cleaned, but I always had the feeling that I was washing in dirty water.
But it was not castile soap, either. YMMV
Using liquid castile soap is the easiest way to make your own dish soap, as the base is already made for you. All you have to do is add a few ingredients, mix it up, and voila! You can purchase liquid castile soap at most health food stores (or make your own, directions follow). Here's what you need:
2 cups of castile soap*
A few drops of essential oil
1/2 cup of water
To make the soap, follow these instructions.
Combine two cups of liquid castile soap with 1/2 cup of warm water.
Add a few drops of essential oils for a pleasant scent.
Shake or mix well and place in a squeeze bottle.
Shake the soap well before using.
*How to make your own liquid castile soap: http://www.ehow.com/how_4719163_make-liquid-castille-soap.html
Castile soap is commonly found in health food stores due to it's mild and natural ingredients. If you want a greener alternative to commercial soap, or have concerns about the chemicals in most soaps, Castile soap is the solution. Castile soap gets it's name from the Castile region of Spain which is known for it's production of olive oil. Castile soap is made mostly of olive oil, making it gentle and hydrating to your skin.
Difficulty:EasyInstructions
Things You'll Need
2 cups olive oil
1/2 cup lye granules
12 cups water
candy thermometer
Suggest Edits
1
Heat the olive oil to 80 degrees. You will allow it to cool to 75 degrees before adding the lye.
2
As the olive oil is cooling dissolve the lye into the 12 cups of water. Use a wooden spoon to stir the lye as it dissolves. Use extreme caution when mixing and pouring lye! Work in a well ventilated area, wear eye protection and keep some vinegar handy in case you get some lye on your skin. The vinegar will neutralize the lye.
3
After you have the lye dissolved in the water and the olive oil has cooled to 75 degrees, slowly add the lye to the olive oil. Stir well and continue stirring for 15 minutes as the liquid Castile soap cools.
I make 100% olive oil castile soap. Then I grate it up with some water and let it soften. Then add more water and heat it up until it has a good shampoo (dish soap?) consistency. I do add herbs to my shampoo water however.
I imagine this dish soap would be a lot like Ivory liquid dish soap.