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-   -   Etching (http://www.knifenetwork.com/forum/showthread.php?t=65543)

dtec1 09-14-2015 10:31 AM

hey guys...i watched a video last night where a guy etched a billet many times (during each step) during a damascus project. to show what the different steps produce. one of my questions is if i forge welded (or think i did) but hadn't started drawing out the billet if i grinded down the surface and then etched would it help to inspect the billet and see if the forge welds had taken hold good? also how long does the etching stuff last how many times can i use it over and over again? i have the PCB stuff from radio shack i think its ferric choride

hey guys...i watched a video last night where a guy etched a billet many times (during each step) during a damascus project. to show what the different steps produce. one of my questions is if i forge welded (or think i did) but hadn't started drawing out the billet if i grinded down the surface and then etched would it help to inspect the billet and see if the forge welds had taken hold good? also how long does the etching stuff last how many times can i use it over and over again? i have the PCB stuff from radio shack i think its ferric choride

Ray Rogers 09-14-2015 11:21 AM

How would you know by looking at it if the weld took or not? A little stickiness looks the same as a solid weld, the only way to know the difference is to turn the billet on its side and hammer at it to see if it separates.

The etchant lasts a very long time unless you manage to pollute it by getting some copper or brass etc in it. It gets weaker over time but adding some fresh solution to it can spiff it up although its probably smarter to just replace it every year or so (depending on how much you use it) ...

dtec1 09-14-2015 08:21 PM

when you say turn it on its side and hit it to see if it comes apart you mean when its hot or when its cold? hot right? i have done that when hot and nothing came apart

jmccustomknives 09-14-2015 08:33 PM

If you use a slicer blade and cut it (while it's cool) you should be able to see any places that didn't weld up. They will show up as a black line. The steel should show no sign that it was ever made of multiple pieces (where you cut it).

Ray Rogers 09-14-2015 08:53 PM

Yes, when its hot. Sounds like you have a weld....


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