1960s coloring in manufacturing of fabric and plastic | pressku.com

I'm a creation historiographer and would for illustration to cognize why, successful nan 1960s, apparel and integrative products look to person travel successful constricted colours (e.g. white, yellow, red), whereas nan 70s saw for lawsuit orange, green, and much shades added to nan assortment. Is it because of chemic limitations, early on, successful nan coloring process during mamufacturing? I request this info for a scholarly publication, truthful it would request to beryllium citation worthy (i.e. nary opinions).