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Recipes for Ithaca Soap Liquid

Old Fashioned Laundry Soap:

For the best results, please follow the instructions very carefully. This is not difficult, just a precise formulation. You can create a minor soapy explosion and a BIG mess, otherwise.

These measurements are for one 16 oz. bottle of Ithaca Soap Liquid Unscented. It's very important that you use Ithaca Soap Liquid Unscented. The essential oils may cause undesired results (like an explosion, which I have done with our soap. It could have happened because I mixed to quickly).

When you do this correctly with Ithaca Soap, you will end up with a creamy white thick laundry soap. It is a little more caustic, just like laundry detergent, so it's not pleasant to touch it too much.

Important!! Do this outside or in a well ventilated room by an open window or door. When you add water to the washing soda, it will off gas irritating fumes for 30 seconds. Keep pets and children away during the mixing process.

Collect all of the ingredients and tools before getting started.


16 oz. Ithaca Soap Liquid Unscented

3 teaspoons washing soda

16 oz. white vinegar

16 oz. water


1 dry plastic gallon jug

Plastic or rubber gloves


Do this in a laundry sink by an open window or outside in a wash basin, just in case you make a mistake. If you do it right the 1st time, there will be no mess. If you do something out of order or not exactly right, it will still work as laundry soap, just not as well and won't be a thick creamy consistent soap.


1. Put the washing soda in the plastic jug.

2. This is the fume-y part, so do not look into the jug when you add the water.  Definitely hold your breath.

3. Slowly add the water and gently swirl it around. This will dissolve the washing soda.

4. This is another fume-y part, so do not look into the jug when you add the soap.  Definitely hold your breath.

5. Slowly add the Ithaca Soap Liquid Unscented. Gently swirl it around. The mixture will cloud up and thicken.

6. This is another fume-y part, so do not look into the jug when you add the vinegar.  Definitely hold your breath.

7. Slowly add the vinegar and swirl around.

8. Leave the jug UNCAPPED and in a ventilated place where it will be undisturbed for 30 minutes before capping.

9 You have successfully made laundry soap (not detergent). Use approximately 1/4-1/3 cup per laundry load.


I have not done this with any other soap brand. I have no idea what would happen with another soap brand. Ingredients vary, and many other companies are not as natural as their marketing says they are. If you try this with another soap brand and you have an explosion, all I can say is I warned you. It's not my problem. An explosion is a little scary. It's definitely very messy. When I've had them with our soap and our safe ingredients, it's not deadly, it's just a cleanup job. Luckily I have a sense of humor with this stuff. With other soap brands and questionable ingredients, you could make a weird gas. For the best results, do this with Ithaca Soap. 

 Hand washing delicate fiber instructions:

Our bar and liquid soap is great for washing wool and silk. I am a textile artist and work with a lot of wool and silk fabric, yarn and roving. I use natural plant based dyes and  am also a wet felter. Our soap is gentle enough to leave the integrity of the fibers, but strong enough to clean. 
Here’s how I wash my fibers:
1. Fill a sink or wash basin with cool - warm ish water, swishing around the soap to get good suds. 
2. Place in garments, making sure there is enough water for the fabric to swish around freely. If the suds get eaten up immediately, your garments are a little dirtier than you thought (wool can be like that) and you may want a little more soap. Soak for 30-60 minutes and swish around 1 or 2 times.
3. Drain, squeeze garments, fill basin again with cool ish water, swish around. Repeat this 2-5 times to get all of the soap out.
4. Fill basin 1 more time and add some white vinegar - anywhere from 1/4 c to 2 c depending on how much fiber you are washing at one time. Add your rinsed garments, swish around and let soak for 10 minutes. Rinse again. 
5. Squeeze out all excess water. Lay a towel on the floor, lay garments in the towel, roll up and gently step on it to get out all of the water. Dry either laying flat or hanging depending on the garment.