In my house growing up, one didn’t put object directly on wood so as not to mar the surface. Table lamps, vases all had a doily or a felt pad to keep the underside of the lamp or vase from marring the wood. Many of the crocheted doilies we owned were made by my grandmother’s friend, Mrs. Lustig. they were all made using ivory cotton crochet thread, the kind one used to buy at Woolworth's sold by the brand Knit-Cro-sheen.
When I was in high school my friends used to crochet kippot for their boyfriends either using the knit-cro sheen or the finer French made DMC crochet threads. I have seen doilies made out of both he lighter weight DMC threads and the heavier weight as well as the heavier American crochet threads.
Here is the thread made doily next to a doily made out of DMC weight threads. you can see that it is an entirely different kettle of fish.
Yes, I need to wash the soiled doily. That won’t be difficult. I inherited a small stack of these thread made doilies.
When my mother would serve cookies each serving platter would be lined with paper doilies. I have taken to using the cloth doilies in my stash. I know it’s a very old fashioned way to serve cookies.But what’s the point of having these treasures if they aren’t being used?