On Thu, Oct 10, 2013 at 9:27 PM, A. Mani <[email protected]> wrote:
> On Tue, Oct 8, 2013 at 12:22 PM, J T Dsouza <[email protected]> wrote: > > No. BUT isopropyl alchol is usually adulterated with kerosene and naptha. > > That leaves a white residue. This residue is an excellent insulator. If > you > > get it on the pins, there is some chance of the cpu becoming > intermittent. > > So ideally immerse only the heatsink and cpu without getting the pins > into > > alcohol. > > rubbing alcohol is ~70% pure isopropyl + 30% distilled water. > If it leaves a white powdery residue, it is kerosene+naptha > > > OR get unadulterated alcohol - an extremely difficult ask, unless you > have > > friends in the chemical industry. > > Not really true. 99.95% pure is available but expensive. > Not quite sure if available in small quantities. It is available in big drums with excellent purity. > Slightly less pure but perfect for contacts is also available. > > Another option would be to use acetone. > NEVER use acetone unless you are sure of the encapsulation material. It can chew quite a number of epoxies and plastics. Although CPUs have a ceramic substrate, the metal heatsink to ceramic bond is epoxy. -- http://mm.ilug-bom.org.in/mailman/listinfo/linuxers
