Conservation treatment and storage of excavated urushi objects appear to be more difficult than that of other excavated wooden objects, because they are composed of complex materials wooden body, groud coating and urushi coat. The number of urushi objects from the site of Edo period (17-19 C) being conserved and stored is increasing these days. Rough-and-ready materials and various urushi techniques employed during that period made it possible to produce urushi objects cheaply and quickly under mass production. However, this fact itself may be associated with exfoliation and shrinkage of the coating surface and thus causing difficulty in thier treatment. In this paper the author presents some interesting facts by deciphering a series of lod manuscripts. For example, it is said that a large amount of imitate mixture such as oil âegoma aburaê, starch âdenpunê, tannin âkakishibuê and protein ânikawaê blended as a filler with urushi. It is necessary to understand precisely the materials and manufacturing techniques used originally before applying adequate treatment, but we have not yet obtained enough information to judge their quality.