I am more concerned with the chemicals added to and the metals contained within our "drinking" water than the pH level so long as it is somewhere near a pH level of 7.0. If I wouldn't dream of drinking the tap water, I certainly wouldn't want to jump-start chemical reactions within meteorites by using it as a coolant.
By the way, the TDS and pH levels change throughout the day here. The incoming tap water TDS levels are much higher in the morning than the afternoon. I use Potassium Hydrogen Phthalate which has pH level of 4.00 and Mixed Phosphate with a pH level of 6.86 to occasionally calibrate my meters. I do not like the idea of adding anything to the cutting coolant and have produced some very stable pieces using self-filtered and sometimes distilled water. I have seen meteorites ooze some pretty nasty greenish brown juice like Gubura and Brenham within a few months after being cut with tap water. Who knows what started the reaction, perhaps chlorine? Kindest Regards, Adam Adam ----- Original Message ----- From: Richard Montgomery <[email protected]> To: Don Merchant <[email protected]>; Adam Hupe <[email protected]>; Adam <[email protected]> Cc: Don Merchant <[email protected]> Sent: Tuesday, November 27, 2012 5:31 PM Subject: Re: [meteorite-list] Water cutting question Adam and List...(curious me, and although I'm not cutting yet, will soon.) The question: given any local water's TDS and variable ambient pH in all of our waters vs. using distilled water...why not use a commercial standard buffer 7.0? -Richard M ----- Original Message ----- From: "Don Merchant" <[email protected]> To: "Adam Hupe" <[email protected]>; "Adam" <[email protected]> Cc: "Don Merchant" <[email protected]> Sent: Tuesday, November 27, 2012 9:52 AM Subject: Re: [meteorite-list] Water cutting question > Great Info Adam! > Sincerely > Don Merchant > ----- Original Message ----- From: "Adam Hupe" <[email protected]> > To: "Adam" <[email protected]> > Sent: Tuesday, November 27, 2012 11:53 AM > Subject: Re: [meteorite-list] Water cutting question > > > I remeasured the PH and TDS levels of my incoming tap water and again after > being filtered. > > Before filtering After Charcoal and RO Filtering > > TDS: 515 PPM 31 PPM > PH: 7.7 7.1 > > > It looks like 7 stage RO filtering made the water move towards PH neutral > from being on the basic side. A reading of 7 would be considered perfect > neutral so I am happy with a PH reading of 7.1. I would rather have it lean > towards basic than acidic which is the case here. On the other hand, the TDS > level of the incoming tap water exceeds EPA standards! I wouldn't dare drink > the tap water here. Might end up with a case of kidney stones! > > I don't think meteorites would be happy with the tap water here. I will do > chemical testing in a few weeks. I hope there is no chloramine in our system > as is the case in California. > > Kind Regards, > > Adam > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
