Hi Kevin, something you might want to try; sounds indecent, but somebody's got to do it<g>. "Naturalamb" condoms are made from (ugh!) sheep intestine, and are permeable to a degree. They have been used successfully in electroplating experiments. Another option is unglazed plant pots, but you'll have to seal off the hole in the bottom - maybe silicone rubber? Have fun, Malcolm
Kevin Nolan wrote: > Hello all. Another report on trying to eliminate plate-out, inspired > by a recent mailing to and from 'Ole Bob'. Some months ago I posted a > speculation that wrapping a cathode in eg artificial chamois may > dramatically reduce plate-out - because that would greatly reduce the > amount of fresh fluid contacting the cathode surface. Since then Bob > posted a comment about success using cotton bias tape wrapping - what > is called 'bagging the electrode'. I have tried it using fairly thick > cotton twill, wrapped twice around a stainless steel plate (40mm X > 200mm section) and secured with small rubber bands. For everything > else the same, current is reduced about 20% - from ~ 8.5mA to ~ 6.5mA > owing to cotton wrap. The big improvement is a dramatic reduction in > cathode plate-out, which is now just a thin, fairly adherent film that > barely stains the cotton (only at the plate edges). No gunk fall out, > no filtering, perfectly clear and sparkly free CS, with moderate > levels of both tyndale and metallic taste. NOTE: This is using > demineralised water to which citric acid was added, which dramatically > boosts conductivity. It means the majority of charge carriers reaching > the cathode and reducing there will be H+ ions, not Ag+. Not sure how > effective wrapping would be using the traditional LVDC method - ie > relying on residual impurities in DW to start things yields nearly all > the positive ions in solution as Ag+. regards, Kevin Nolan
