抄録
Sample of silk fabric scoured under different condition were prepared, and their tendencies to yellowing and browning were examined. The authors also investigated a relationship between composition or construction of silk fibroin and yellowing or browning af a boild-off silk.
The yellowing or browning during scouring can be diminisehd by adding a reducing agent to scouring liquor. The liability to yellowing or browning after scouring has some relation with a destruction of peptide chaid in fibroin which occurs during scouring, and this destruction takes place more easily when the pH of liquor is higher.
From the results it can be deduced that a boild-off silk will not easily yellow or brown, if silk is scoured in a liquor of low pH, and in a neighbourhood of isoelectric point of silk by adding a reducing agent.
