When Max Factor introduced Pan-Cake make-up in 1937, it was regarded as something new by cosmetic chemists. However, when they looked into its formulation they soon realised that types of cake make-up had existed as far back as the 1910s.
As women were confronted with the problems of carrying loose powder around in their purse or handbag, many made the switch to using compressed face powders instead.
Starting in the 1930s, Helena Rubinstein used a number of optical devices to drum up sales. One of these used a light filter that would not be widely used by dermatologists until many decades later.
In 1910, Charles Henri Willi arrived in London. The following year he opened a cosmetic surgical practice which operated quite legally from 1911 to 1961 without Willi having any medical qualifications whatsoever.
In its heyday there were over 5000 Marinello salons across the United States, bringing Beauty Culture to middle and small town America.
I am based in Perth, Western Australia. You can contact me by email. I am always keen to hear from others interested in this subject. Thanks to everyone who has already corresponded.