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Handling of materials caused by accidental yellowing. Tiles, mosaics, and transportation from the factory to the construction site. The packaged cartons or straws are wet by the rain, and the water penetrates the building materials to form yellow spots. The following treatment methods can be used depending on the pollution situation and the degree of penetration into the interior:
(1) If the contaminated color is shallow and the pollution surface is not large, it can be washed with 30% oxalic acid liquid.
(2) Those who are seriously polluted should be washed with hydrogen peroxide (H202). It has been proved by practice that the generally contaminated building materials will be effective after 12 to 24 hours, and then rinsed with clean water. Oxidation of faded tiles with strong oxidizing agents does not damage the gloss of building materials. Tens of thousands of contaminated white tiles have been cleaned and have achieved satisfactory results. The method has low investment, simple process and no toxicity to the operator's body (open-air operation).
Wood look tile is generally yellowish in color, not yellow.