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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Further advice on scraping...
Is there a consolidated opinion on the amount to nudge a piece of work
sitting in prussian blue in order to encourage marking? Procedurally I have been using (in compass points) 1 inch north, then 1 inch south, then 1 inch east, then 1 inch west. I use the rubber handle tips of a pair of needle nose pliers to apply the force as much as possible to either the x or y axis (e.g. with no pushing down on the piece). Is this a good procedure, or should I try something different? (BTW - when I do no nudging whatsoever, there appear some number of dots on the surface, but so faint that I often need a magnifying glass in good light to see them. The dots using the method outlined above are good - but more smudges than dots. This fact is bothersome, I think. The examples I have seen are clearing circular-ish dots). Also, I have a light piece I am working on - 6 inches by 3 inches by 3/8 inch. I found that it does not mark well. Noticing the type of surface plates and other things that are usually scraped, I think usually the work is much heavier. Therefore I tried placing a couple of matching pieces of the work on top after it is placed in the blue. I seem to get a much more uniformly good marking. Is this procedure acceptable? When the piece is not weighted, there are times that when nudged, it will ride the surface like an air hockey puck with just the lightest of nudges and I have to grab it to keep it from going off the side. I think there is some sort of air pocket induced when this light work is not weighted.... Thanks in advance. I have read every scraping post on this group and now I can say that my eyes are as bleary as my hands blue. I have spent an amount of time on this "effort" to which I am almost becoming embarassed to admit. But now it is a matter of pride. This work will go flat! So any help or opinions would be greatly appreciated. |
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