An antique linen dealer shared her secret with me, over 25 years ago, for cleaning vintage linens.The first step was soaking in Biz, a powdered detergent. I soaked this crocheted tablecloth overnight in Biz. Directions are on the box.
Wash in borax and vinegar. Let soak. Hang to dry, cut lemon in half and pour salt onto lemon rub vigorously over the stain leave to dry. Wash again with borax. (All cold water) Works like a charm. I love old vintage tablecloths love the colors.