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Synthrapol Detergent

As a prewash - As an afterwash

 4.65 ( 175 review )
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Stock# Product Details Quantity 1-3 4-19 20+
  Synthrapol - Pint (16oz)
  Synthrapol - Quart (32oz)
  Synthrapol - Gallon (128oz)
  Synthrapol Low Foam - Pint (16oz)
  Synthrapol Low Foam - Quart (32oz)
  Synthrapol Low Foam - Gallons (128oz)
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Product Description

Synthrapol works best with HOT water, yes, HOT water, when washing out excess dye, particularly Fiber Reactive Dye. You are getting out the excess loose dye molecules that have not been chemically bonded to the fabric. This is a good thing! Then you can rest asssured that the dye won't bleed on you, or the family underwear, the next time you wash it. Hot water is also best for the pre-washing we discuss below. Acid Dyes for wool and silk are a different story - hot water can actually break the bonds of the acid dye and cause more washout of color than you would want. Wash wools and silks dyed with Acid Dyes in cool to warm water. Synthrapol is great for washing silk and wool also because of its neutral ph. High pH detergents actually can damage silk and wool.

Prewashing in Synthrapol helps remove invisible lubricants, fingerprints, dirt, oil, silk worm gum and other impurities that can interfere with the dye and cause uneven dyeing. It is especially important for tub dyeing where you want an even consistant dye job. Not pre-washing is one of the biggest causes of a "splotchy" result. Even PFD (prepared for dyeing) fabrics, yarns and clothing should be pre-washed! We never recommend skipping this step, especially with all the imported fabrics and clothing these days.

Synthrapol as the afterwash keeps loose dye particles of dye in suspension so they don't stain other areas of the fabric. Also, since Synthrapol is pH neutral, it doesn't encourage loose fiber reactive dye particles to bind back on where they are not wanted, the way a high pH detergent would. So for tie-dyers, batik artists and printers: this helps white and lighter colored areas from being stained in the final wash by the excess dye. We get calls all the time about "muddy tie-dyes" - the secret is in the Synthrapol! (Also in the procedure for rinsing out the excess first!)

Use 1/4 cup (2 oz) of Synthrapol per full washing machine load for cotton, Rayon, hemp, etc. and 1/8 cup (1 oz) for silks or front loading wash machines. Some folks say you can get away with less, but it depends on what you are doing, the hardness of your water, etc.

Our special new Low Foam Synthrapol is better for those front loading washing machines. Use 1/8 cup (1 oz) per load.

You can also find a more eco-friendly substitute for Synthrapol with our own Professional Textile Detergent, which is less expensive and non-toxic!


We also now have our own Professional Textile Detergent - #PTD which is non-toxic and more economical alternative to Synthrapol.

175 Reviews
Average Customer Review
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Does what it's supposed to...and fixes running in clothing washed in regular detergent also...Whoo-hoo.
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4 of 5 users found this review helpful.
Still my favorite for removing excess dye and pre-washing everything for tie-dye. Meriah
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4 of 4 users found this review helpful.
I would never consider washing out shirts without this detergent. I had a group of 12-year-olds tie dye shirts---they used A LOT of dye...and A LOT of different colors. After rinsing we washed them all in the same load with this detergent and didn't have any trouble with colors migrating. Even the parts of the shirt that were supposed to be white stayed white!
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3 of 3 users found this review helpful.
I damaged a fringe first time I used it not understanding just how potent a scour it was.
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3 of 4 users found this review helpful.
I'm a quilter. I use this detergent to give my finished cotton quilts their first wash. For quilts I wash them on warm setting with extra rinse and Synthrapol detergent and then dry them in the dryer. I recently finished a quilt with white mixed with very bright colored batiks including reds and blues. I was a little worried about it bleeding in the wash but with Synthrapol it turned out beautifully with no streaking or color transfer. This is a wonderful detergent.
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1 of 1 users found this review helpful.
This product works great and does not void the warrantee on my new machine. Works great as a pre-treat on stubborn stains And with a some work it is taking the blue nail polish out of my khaki pants!
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2 of 2 users found this review helpful.
I love this stuff! I use a lot for an off-label purpose combined with soda ash in hot water just like a prewash it gets out cat urine. Really really. The pillow cases my grandmother embroidered and tatted over fifty years ago recently marinated in cat pee for several days and now they look and smell wonderful.
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2 of 2 users found this review helpful.
Not Sure what I didi wrong...but this product totally destroyed my dye job. I thought I would use it as a pre wash but it made my dye job all splotchy with dark spots.....wont use again.
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1 of 2 users found this review helpful.
Resolved most of my dying issues
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0 of 0 users found this review helpful.
Easy to use!
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0 of 0 users found this review helpful.
It seems to work well for prep & after washing...but the claim that it doesn't "stain" other areas ( especially white) is not always only works sometime not all the time!
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1 of 2 users found this review helpful.
Colors don't run in the washing machine with this!
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1 of 1 users found this review helpful.

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