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Starting in the 1940s, a series of [[urea-formaldehyde]] derivatives were introduced. Technical issues overcome included yellowing, odor, and the tendency of some agents to accelerate the degradation of fabrics by [[bleach]]es.<ref>{{cite web|url=https://www.usatoday.com/tech/columnist/andrewkantor/2004-12-31-kantor_x.htm |title=Chemistry and nanotech work to make carefree clothing |publisher=Usatoday.Com |date=2004-12-31 |access-date=2019-04-30}}</ref><ref>{{cite web |url=https://www.thoughtco.com/why-do-clothes-wrinkle-607888 |date=February 11, 2020 |title=Do You Know Why Clothes Wrinkle? |last=Helmenstine |first=Anne Marie |website=ThoughtCo }}</ref>{{self-published inline|date=July 2020}}
By 1950s fabrics made from synthetics and treated cotton were described as “wash-and-wear” to point out that there was no need to iron them.<ref name="Collier 2004 Performance Finishes">{{Cite book |last=Collier |first=Billie J. |date=2004-11-30 |chapter=Performance Finishes |url=http://1.droppdf.com/files/fmrXY/encyclopedia-of-clothing-and-fashion-vol3.pdf |title=Encyclopedia of Clothing and Fashion |volume=3 |page=32 }}</ref> The claim was though somewhat dubious in the sense that they did require some touch-up ironing
In the 1960s and 1970s, the developments in the chemistry of textile-treatments led to the discovery of [[Dimethylol ethylene urea|DMDHEU]], a chemical agent that made possible a low-cost but superior-quality production<ref name=":0"/> of ''permanent-pressed fabrics'', which are now known as durable-pressed finishes.<ref name="Collier 2004 Performance Finishes"/> However, these processes weakened clothes; as a result, they wore out faster.<ref name=":2">{{cite journal |last1=DeWitt |first1=John W. |date=March 1994 |title=Wrinkle-resistant redux |journal=Apparel Industry Magazine |volume=55 |issue=3 |page=22 |id={{ProQuest|215439347}} }}</ref>
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