1955 26 Sept. 30 (advt.) Wond-r-dial... Selection of normal or delicate wash cycles... Gives you 2 washers in one.
1986 (Nexis) 7 June e19 Run the pillow case through the washer on a delicate cycle, using mild soap and cold water.
2012 (Nexis) Nov. Feather pillows can be washed on the delicate setting using a little detergent.