Grass
Grass stains are primarily chlorophyll (green plant pigment) plus proteins from the plant cells. The chlorophyll bonds to fabric quickly — solvents and enzymes break it down best.
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Frequently asked questions
Why is grass so hard to remove?
Chlorophyll molecules are flat and slot between fabric fibres tightly. They also bond rapidly — within minutes on damp fabric.
Does sunlight help with grass stains?
Yes — UV light degrades chlorophyll (which is why grass turns yellow in the sun). Hanging treated items in sunlight can eliminate ghost stains.