Most tannin stains are colored stains from things like chocolate, fruit juice, and tomato sauce.
ON COTTON, LINEN, AND DURABLE SYNTHETICS
Gather These Tools: Stain Solution, All-Purpose Bleach Alternative, Stain Brush
Apply Stain Solution directly on the affected area. For old, stubborn, or large stains, strengthen the formula by sprinkling All-Purpose Bleach Alternative on the Stain Solution to create a powerful paste.
Work the solution into the fabric using your finger or our Stain Brush.
For added cleaning power, pour boiling water from a kettle onto the affected area. The force of the pouring water helps to do the work. You can also use water from a faucet set to its highest water pressure output.
Soak the item in a basin filled with hot water.
If the stain is not completely gone, repeat this process until satisfied.
Launder according to care instructions for washing.
ON SILK, SILK BLENDS, SILK-LIKE & DELICATE SYNTHETICS OR WOOL, CASHMERE, WOOL BLENDS, & WOOL-LIKE SYNTHETICS
Follow the same steps listed above, but exclude the use of All-Purpose Bleach Alternative (it should not be used on silks or woolens) and use tepid/lukewarm water for pretreating and presoaking. When presoaking, be sure to never let a silk or woolen item soak for longer than 30 minutes.