02664nas a2200409   4500000000100000008004100001653001300042653001900055653002000074653002300094653001300117653002900130653003400159653001900193653001800212653003300230653001400263653002100277653000900298653003800307653001800345653001200363653000900375653000800384653001600392100001700408700001500425700001800440700001500458700001600473245008400489856015100573300001200724490000800736520149000744022002002234                                       d10aBacteria10aBinding phasis10aCoating process10aCoating techniques10aCoatings10aGambiered Guangdong silk10aIntangible cultural heritages10aIron compounds10aIron minerals10aPrecipitated Fe(II) compound10aRiver mud10aScientific basis10aSilk10aTraditional mud-coating technique10aValence state10aCoating10aIron10amud10asericulture1 aYuanyuan Pan1 aYang Xunan1 aXingjuan Chen1 aMeiying Xu1 aGuoping Sun00aThe right mud: Studies in the mud-coating technique of Gambiered Guangdong silk  uhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84995676375&doi=10.1016%2fj.clay.2016.09.024&partnerID=40&md5=1f4e77a391e2e4593ca8d09baa9fe429  a516-5200 v1353 aGambiered Guangdong silk is a traditional cloth with two-tone colors, deeply rooted in China. Its coating technique has been included in the National Intangible Cultural Heritage List. In the unique coating process of the silk, river mud plays an important role but there has been very little research involving it. To gain insight into the characterization of the special mud, the usable mud with the unusable mud were compared with SEM-EDS and XRD. The results showed that Fe(II) was the main valence state of iron in the usable clay mud (nearly 90\%). Although the iron mineral particles constituted of akaganeite coated on the coated silk surface, akaganeite was not used as the original pigment because of its poor availability. The significant correlation between the Fe(II) content and textile lightness (L*(1)) (r = -0.82, p \textless 0.05), and sterilization test confirmed the role of Fe(II) in the coating process. Meanwhile, given the penetration of FeSO4 into the back side, it suggested that the solid and organic-binding phases of Fe(II) were the main forms of Fe. Moreover, there were no bacteria participating in the 1-h coating process but they importantly maintained the coating availability of the mud. In short, the right mud for coating Gambiered Guangdong silk need enough precipitated Fe(II) which could obtain from bacteria reducing Fe(III). This paper provided the scientific basis for the inheritance of the mud-coating technique of Gambiered Guangdong silk.  a01691317 (ISSN)