Re: Réf. : Re: CArbon Fresson
I also have Duchochois (1892) and MacLean (1898) that I will put on the website but all of these sources do not know the secret--they are just guessing.
Very interesting your text of Paul Anderson 1935 on your website
If i find this of Alenius Edward K of 1934 The Fresson Process, American Photography, dec. 1934,
Also me, i post on my Website for all