Marble - Organic stains
Organic stains are caused by tea, coffee, ink, tobacco, soft drinks, fruit juices, iodine, flowers and colors from paper and some textiles. The stain usually takes the shape of the object that caused it and is often irregular in shape. The following steps should be taken to remove organic stains from marble.1. Mix a poultice consisting of whiting and 20% hydrogen peroxide (hair bleach) to form a thick paste.
2. Apply a 1/2" thick layer of this mixture over the stain.
3. To keep the poultice from drying too rapidly, cover the poultice with a piece of plastic kitchen wrap, held in place with masking tape.
4. Leave this in place overnight for very stubborn stains as much as 48 hours may be required.
5. If after the first application the stain is still noticeable, repeat the application , or add a few drops of household ammonia to the poultice mixture just before covering it with the plastic wrap.
6. After the stain disappears, remove the application, rinse with clean water and wipe dry.
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