Ilford papers

[Sergio Caetano]

Does anybody know the meaning of "K" and "M" printed on envelopes of Ilford enlarging papers? Ex.: Ilfobrom grade 3 "3.1 K" ; Multigrade IV "2.5 M" . Thanks

[John Cook]

I believe it is Ilford's screwball code for surface texture. Since they also show this information in English I never bothered to memorize the code. Contact them via email for a complete explanation at

http://www.ilford.com/html/us_english/homeng.html