You run a very high risk of bleaching the image with undiluted rapid fixer, and this can happen very quickly. Fixers are designed to be used at an optimal strength although with papers, you can use more dilute but for longer. Over fixing in fresh fixer will cut the highlight tones particularly with warm tone papers..
It's possible he's talking about using something like Hypam as 1+9 for the initial fixing and the 1+4 for the second fixing bath, I'd call 1+4 full "working" strength and 1+9 dilute.
Ian
Last edited by Lostlabours; 26th December 2016 at 11:54 AM.
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