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I haven't been Powder Painting jig heads long, but had a strange one today.
I was baking some of the odd jigs I had around after PPing and had three of them do this.
Attachment 160470
It looks like the head melted off the hook. One of the heads is in the picture while the other two are firmly stuck to the bottom of my oven rack.
It appears as if maybe the heads were not lead but perhaps plastic.
Clint if you want to make sure cover the piece in the middle with a towel and smack it with a hammer - if lead it should flatten right out if plastic it will shatter.
Were the heads plain when you coated them?? or coated with another paint??
Was it a regular oven or toaster oven?? Either one - Make sure to get yourself an in oven thermometer - $3-4 at Walmart, Target .... and check your temps.
Never had this one happen before!!! I melted a few off the hook when I was first learning how to use the heat gun for powder painting but never in the oven.
I put the one in the picture in a big pair of pliers and squeezed. It is some sort of metal as it deformed like lead but with less resistance.Quote:
Originally Posted by Fatman
They had a grey finish that APPEARED to be lead.Quote:
Originally Posted by Fatman
I use a toaster oven and have a thermometer. Read 350º as is always does.Quote:
Originally Posted by Fatman
I have progressively used less and less time over the heat gun. My first few batches had as much paint as they did lead.Quote:
Originally Posted by Fatman
Clint got me at a loss!!! Hope that was all you had left of those heads!!! Gonna have to do some digging around trying to figure this one out. Wouldn't think tin, maybe some type of solder.
maybe it was indium? a filer metal that is used to lower the melting point of lead ... here is a example of melting temps..
just found this doing a search of low temp solders...
Bismuth melts at 519.8° F (271.3° C).
Tin melts at 447.8° F (231.8° C).
Lead melts at 620.6° F (327.5° C).
Indium melts at 312.8° F (156.6° C).
Clint I think it is pewter mixed in with some lead.
The three that melted were the only ones I had of that jig, so it’s not likely to happen again. But I have been thinking. I throw light jigs 1/16th and 1/32nds oz. and often I wish I had a jig of those weights but with a bigger head for a larger profile. Does anyone make a jig of a lighter metal or plastic that would be the size of a 1/8th oz.? I like the slow sink rate of the lighter jigs but would like one that presented a larger cross-section perhaps to attract more attention.