I had another conversation with this person, who I had the galvanoplastie discussion with...
He seems to be on a mission to prove me wrong every time

I've decided to let him smother in his own glory, but for my own benefit and genuine interest, I'm looking for some answers.
Subject of this conversation was the process of 'fluogravure'...a concept of layering glass with enamel to be acid cut to a required design. The principal's the same as cameo glass, the only difference, to my knowledge, is the enamel.
According to several articles in my books here, and articles on the net, the Freres Muller introduced this with Léon Ledru at VSL when they were commissioned to create several new models for VSL, at the turn of the century.
I have read that this process was called fluogravure by the Müller brothers an/or Ledru, but I have come across some descriptions of items by Müller, with the same technique mentioned.
My books date from the 60/70's and the person I had this delightful discussion with, insisted that it was a modern term for this process, and that it's actually just acid cut cameo glass and that if I wanted to make him believe my fairy-tale story, I should come up with some hard evidence... which I'm not going to do as you can imagine...
Unfortunately, I haven't come across any articles mentioning this technique at Müller, but I wondered if any of you might have. Basically I'm asking if this term was already used at the time by Müller.
I'm just thinking, have all these people, previous directors at VSL, writers about glass and even a professor, got it all wrong?
Thank you for your help and time.
Anne.