Weird fact: Despite having been around for decades, laundry symbols have not been assigned Unicode code points. This mailing list email from Ken Whistler in 2003[1] suggests the existence of a conflicting Canadian standard as a reason, along with a philosophy of not including "icons" (especially color-coded ones!) in a "character" set, given that pictographic language is likely to change over the next century.
(Unicode threw that out the window in 2010 when they standardized emojis, and given how complex emojis have become Ken's argument is sounding better and better...)
[1] http://unicode.org/mail-arch/unicode-ml/y2003-m06/0274.html