Some remarks to this wonderful paper. When you look at it, it is always matt deep matt deeeep matt as sandpaper. This paper dated from around 1955. There must exist a patent number of it, but until now I didnt found it, I was looking for Mr Reed. The first I found, but not the real Gevaert Patent, is:
Velourpaper from A. Doman, Poland, Polish Patent 23724 from 11.12.1934.
In an article of "Bild und Ton", 5/1959, page 142 about (translated) "How to matt photographic papers" from Dr. Holbe, Gevaluxe is mentioned, that the very expensive electrostatic (in german Beflockung = to put flaky - fluffy parts on a surface) "Beflockung" with cellulosederivats of special length is in no proportion to the commercial result of the paper.
Perhaps Mr. J. Knöfel, DRP 686070 from IG-Farben 17.3.1937, has to do with Gevalux.
In Gevaert-Books, 2 in german from 1938 and 1956, Gevalux is mentioned, in english I have the first english edition from 1930? where Gevalux is not mentioned.
The most important from the instructions for Gevalux:
Never touch surface! Do not touch with another paper the surface in the devel.-bath. Original recept G.251 for normal negatives 2 minutes
water 40°C 800ccm
metol 1,5 gr
natriumsulfit sic 25 gr
hydrochinon 6 gr
soda sic 40 gr
kaliumbromid 1 gr
to 1 liter
for hard negatives recept G.253 2 minutes
water 40°C 800ccm
metol 3 gris
natriumsulfit sic 20 gr
soda sic 20 gr
kaliumbromid 1 gr
to 1 liter
1 liter fresh developer are for 0,5 squaremeter Gevaluxe-paper, not more, because this paper need more developer than other papers.
Fixing is 20 to 30 minutes in normal acid na-thiosulfatbathes allways fresh, 1 liter fixbath is for 1 up to 1,5 sqm Gevalux-paper. Important by fix are the first 30 secondes - good agitation is necessary.
Washing: 1 up to 1,5 hours.
Drying: hang on a line
The interesting is, you get with this over 50 year old paper, storage was always normal room temperature, a correct gradation without fog.