Hi All / James Oops, sorry you were right about the phosphoric acid being not so dangerous. I think I meant one of the others. There are three so called phosphorus oxyacids, one of which is the one I used, and the merk warnings for it are quite extensive, including the mention of the danger to skin, the need to wear a mask and avoid inhalation of vapours and so on. Sorry about that. Keep well Garth Garth Cambray Camdini Apiaries Grahamstown Apis mellifera capensis Eastern Cape Prov. South Africa Time = Honey After careful consideration, I have decided that if I am ever a V.I.P the I. may not stand for important. (rather influential, ignorant, idiotic, intelectual, illadvised etc)