Darko, I've not tried this with Emaks, only with Gallerie, and I've reports from others that this technique also worked with later Agfa papers. I'd love to hear from you if it worked with Emaks, please let me know if you tried.
I have tried it - with Ilford 00 filter and without filter - I got same result. Only with 00 filter I needed 3 times longer exposure. Did not tried other procedures yet.