yellow soap

archaic uncountable

(archaic) Common soap composed of tallow, resin, and soda.

Japanese Meaning

（古語）牛脂、樹脂、ソーダから作られた一般的な石鹸

The old apothecary explained that yellow soap, though coarse, was inexpensive and effective for laundering work clothes.

年配の薬種商は、その獣脂と樹脂と苛性ソーダで作られた庶民用の石鹸が粗末だが、作業着の洗濯には安価で効果的だと説明した。

Sense（1）

(archaic) Common soap composed of tallow, resin, and soda.