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Article #2038Re: Chemical process to reveal engraving (wanted).
From: Volksie Wagen.
Date: Thu, 24 Oct 1991 11:17
Date: Thu, 24 Oct 1991 11:17
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tspcjr@lure.latrobe.edu.au writes: >G'day, >This is one of those "Posts for a friend" jobs. >A friend has an interesting metal object that they picked up in an antique sort >of store that was obviously once engraved, but has just as obviously been filed >away. They'd love to know if there is any chemical process that will allow the >old engraving to be seen (if only for a short length of time). >Any nice recipes out there?! Have you thought of things like magnafluxing etc? Magnafluxing is used by engine rebuilders to test high stress engine parts. If the object was indeed engraved..it might have stressed the metal underneath. Anyway...i think they immmerse the part in something or other 8-) and the apply magnetised iron grindings which stick to the stressed parts. (sorry...i cant recall the actual process) methinks also that a stressed crankshaft is a LOT different to an old engraving. Adrian -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+ Two seals walk into a club. s893971@minyos.xx.rmit.OZ.AU +=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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arc1-ca.pugleaf.net!gmdzi!zeus.ieee.org!europa.asd.contel.com!uunet!spool.mu.edu!munnari.oz.au!bruce!monu0.cc.monash.edu.au!monu6!minyos.xx.rmit.oz.au!s893971References:
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f4886,6517ad9b137375de X-Google-Attributes: gidf4886,public X-Google-Thread: f8ff0,6517ad9b137375de X-Google-Attributes: gidf8ff0,public X-Google-ArrivalTime: 1991-10-24 11:55:15 PST Path: arc1-ca.pugleaf.net!gmdzi!zeus.ieee.org!europa.asd.contel.com!uunet!spool.mu.edu!munnari.oz.au!bruce!monu0.cc.monash.edu.au!monu6!minyos.xx.rmit.oz.au!s893971 From: s893971@minyos.xx.rmit.oz.au (Volksie Wagen.) Newsgroups: sci.chem,aus.wanted Subject: Re: Chemical process to reveal engraving (wanted). Message-ID: <1991Oct24.111758.4525@minyos.xx.rmit.oz.au> Date: 24 Oct 91 11:17:58 GMT References: <1991Oct18.125809.1@lure.latrobe.edu.au> Organization: RMIT Computer Centre, Melbourne Australia. Lines: 31