Flesh washes and inks from T
Coat D'arms produce, what is said to be, the original 'flesh wash' recipe. However, there is the 'blue top' version and the later 'black top' version (now both discontinued from Citadel/GW ... also the 'white screw cap' version, but we will not speak of those), which appear, at first sight, to be very different beasts.
They appear identical, when applied (if the 'black top' is slightly more red, after mulitple passes, but that may be an ageing issue) ...
Other comparisons here, here, here and here.