How to Add Trisodium Phosphate to Laundry Detergent | Hunker
Adding trisodium phosphate to your regular laundry detergent will boost the effectiveness of your clothes washing. Step 1 Add the normal amount of your regular laundry detergent to the washing machine. Step 2 Measure 1/4 cup of powdered trisodium phosphate to the washer as it is beginning to fill with water.
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