Lac-mushi no jyushi jyo - left (305 L)
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| Museum number | 305 |
|---|---|
| Uemura number / title | ; "Haze-some 25" |
| Folder location | 4th shelf |
| Sample location | left (305 L) |
| Fiber type | wool |
| Color | purplish pink |
| Dyestuff (Japanese common name) | ラック虫の樹脂状 : Lac-mushi no jyushi jyo |
| Dye (English common name) | Lac dye |
| Dyestuff (botanical name) | resinous secretion developed by the scale insect Kerria lacca |
| Plant part | resinous secretion / dried |
| Dyestuff extraction | soaked in alcohol |
| Auxiliary agent in dye bath | sodium carbonate solution ? |
| Mordant | alum (added into dye bath) |
| Other auxiliary agent | vinegar |
| Uemura's notes | The dyestuff was soaked in alcohol to extract the dye compound. The extract was mixed with sodium carbonate solution ? () to make a solution for dye bath, to which both vinegar and alum were also added. The dye bath was in an acidic condition, and warmed up during the dyeing. The resultant colors were slightly darker than those dyed with the commercially available pre-extracted lac dye. Similar type of dyed colors are seen with a couple of objects in the Shsoin treasures (), and the results of this experiment may suggest a possible dyestuff used for them. |
| Uemura's date | Kyoto |