Xtol developer uses Vitamin C as its main developer, so …

:-)

Only Vit C (and Na2Co3 :-D!)

Tx400

Only Vit C:

1L H2O+72grNa2Co3+12gr VitC - 23º, 30 min, agit1ºmin-10seg/min

Negativsacn (Epson V500)