Question

How much gram of sodium hexametaphosphate can be added in hard water?

Answer 1

HEY MATE

If the area in which you live has hard water (calcium and other minerals can interfere with your dyeing process) you can easily avoid the problem by using Water Softener (pure Sodium Hexametaphosphate - also known as Metaphos). About 1 cup per washing machine load or 1/4 teaspoon per 8 oz. dye solution should do the trick. The Water Softener works better than products like Calgon (polycarboxylate) which inhibits dye from transferring to and adhering to fabric for some reason.

Side note: The one pound bag of Water Softener is about 1.5 cups

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