Apparently Fortuny's technique has been lost and can't be recovered. Interesting, that with all our technology no one has figured it out.
In the meantime, here's food for thought. Albertine and the Duchesse of Guermantes both wear Fortuny. La di dah!
While we're on the topic of Fortuny, here is a link to the website:
Others are re-reading Proust like moi. I wish the blogger would change fonts and colors. Sometimes interesting blogs can be, alas, hard to read, font and colorwise.