Lemon juice seldom leaves a much of a stain right away. The danger comes in leaving the juice on clothing for too long. Lemon juice contains acetic acid which acts as a bleaching agent, especially when exposed to sunlight.
Flush the area with clean water as soon as possible and then wash as usual. If the garment is non-washable, use a spot treatment technique and blot away the moisture carefully, then dry clean.
If the garment is dry clean only, point out and identify the stain to your professional cleaner. If you are using a home dry cleaning kit, be sure to treat the stain with the provided stain remover before putting the garment in the dryer bag.
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