Writing on back of paper before development

[mshchem]

uso un 6b o 8b en ambas superficie

I love Google translate

 

[MattKing]

uso un 6b o 8b en ambas superficie

That sounds so much more exotic in Portuguese!
(he/she uses either a 6B or 8B pencil on both surfaces)

 

[Sirius Glass]

Good question since once the paper gets wet one can no longer determine which print was first nor what the differences were caused by. Thank you for asking this question.

 

[Rmaydana]

That sounds so much more exotic in Portuguese!
(he/she uses either a 6B or 8B pencil on both surfaces)

 

[rduraoc]

I'd say Spanish, clearly not Portuguese...

 

[MattKing]

I'd say Spanish, clearly not Portuguese...

And I believe you are right.
As I can read neither, I'll just plead a combination of ignorance and a bad guess!

 

[Patrick Robert James]

I use a mechanical pencil on the back edge on FB. I can’t remember the last time I used RC paper but I do the same for it. A mechanical pencil never gets “dull” so it is always legible. If anything, harder leads in the H range are better in my experience.

 

[Mark_S]

I use a 4B pencil, and list time, f-stop, and grade setting on the enlarger.