Great walk down the green-crystal road! Thanks for the thread.
My grandmother kept a box of Oxydol in the cabinet, but only used it for certain laundry tasks. Most often, it was for whitening & soaking crocheted table cloths, doilies, etc. She used to pin and block the smaller pieces, spray them with starch, etc. but the Oxy kept them white without harsher chlorine bleaching.