Moderator's Notes

1) - Spectre07's comment "I think the polished rod that you dip into the solution and then observe how the lubricant "withdraws" on the rod is an easier." The description of this test is found in WAI Forums thread www.wirenet.org/forum/viewmessages.cfm?Forum=12&Topic=324

2) - rdking
I don't respond to private technical messages because this is a public forum for the benefit of all wire and cable readers. I sincerely hope you understand. Thank you.

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212

Peter,
I am thinking that for the Dreves method to work for someone that they would have to run numerous tests documenting the results and then conducting additional tests to show what would happen when you vary % fat, pH, etc.

That being said any data collected would be only valid for that one site and because water varies as well as many other things, the data I might develop would probably be useless for the next guy.

I once worked in a town that had 3 different water sources; deep well, spring, and cistern (collected water). Our lubricants would be working fine one minute and go away the next. there were significant differences in the waater supplies. We finally resorted to a deionizer and things improved tremendously.

rb

Hi Richard,

I agree with you in terms of collecting a lot of historical data to try to make some sense of the the latest data.

From what I have heard, I think this test has far too many variables. (Water quality as you advised, tramp oil on the surface of the sample, sample surface vibration, sample temperature, the condition of the thread, air currents at the surface of the sample, repeatability each time the thread is dropped, plus of course pH, lubricant concentration and so on.)

Cheers
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212