[jonathanjong]

I might be about to, and was wondering if it's waterproof if I dilute the ink and apply it to the foam.

 

[jjinh]

There are plenty of threads on the topic
 
http://www.head-fi.org/forum/thread/343031/black-hd414-pads
http://www.head-fi.org/forum/thread/128974/dying-the-senn-hd414-pads-black
http://www.head-fi.org/forum/thread/500015/making-the-sennheiser-hd414-pads-black
http://www.head-fi.org/forum/thread/143123/anyone-ever-dyed-414-pads
http://www.head-fi.org/forum/thread/94538/dyeing-headphone-pads-particularly-the-senn-414-pads
 
etc etc

 

[jonathanjong]

None of these answer my question. Read again: it's specifically about Noodler's black ink.