Well, this thought experiment has taken more of my brain cells than it should have. After many hours of consideration and googling manufacturers’ packaging I have come up empty.
However, the best description is for Efke Varycon, via the text for a later Adox rebranding:
“Neutral tone fibre based paper with deep blacks and excellent greyscales. (Yep)
“This paper is coated on the last remaining [dunk] coating [machine]…. This also leads to the necessity to develop it at least 2-3 minutes in order to achieve full dmax and greyscales. [Maybe I did? Black is sure black for matte paper]
“The developer and fixer are also faster exhausted, please recalculate their capacity. [Definitely exhausted them, didn’t calculate, therefore impossible to recalculate]
“The paper’s emulsion is free of additional optical brighteners or incorporated developing substances thus making it suitable for alternative printing, two dish development and other processes. No fade out of optical brighteners
over longer exposure to light.”[Presumably true, definitely holding up well in an old shoe box]
It was likely this or a Forte product. I can’t recall (but could be wrong) ever using anything by Agfa or Foma at the time. Then again I forgot the name of this stuff, so…
An interesting note on the image color. Looking at other prints, they vary from slightly warm silver-black to noticeably brown-black. Same for some prints on Polywarmtone. I really did push the developer to the edge of its useful lifespan and this must’ve been the result.
Thanks everyone for your thoughts on the matter. Heckuva job! Mission (partially) accomplished!