Color change after da?

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addictj
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Color change after da?

Post by addictj » Thu Dec 28, 2017 5:06 pm

After blasting I spray down with da, I either put the parts in the oven or hit them with a torch. They come out a different shade, is this affecting anything? It's not letting upload a pic right now

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duke46
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Re: Color change after da?

Post by duke46 » Thu Dec 28, 2017 9:04 pm

That is one thing I have never heard of so if that is happening then it has to be from another source and not from the DA unless something has contaminated it for whatever reason? Maybe what you are using to spray the part down is the only thing I can think of at the moment?
Get a good quality sprayer and try it with new DA!
Last edited by duke46 on Fri Dec 29, 2017 8:42 am, edited 1 time in total.
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addictj
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Re: Color change after da?

Post by addictj » Thu Dec 28, 2017 9:19 pm

not sure how good these will come out
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addictj
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Re: Color change after da?

Post by addictj » Thu Dec 28, 2017 9:23 pm

here is a side to side. part one left is before da, part on right is after da and oven. its darker then it shows up in the picture
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duke46
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Re: Color change after da?

Post by duke46 » Fri Dec 29, 2017 8:46 am

Could it be that the part for some reason is getting hotter than it should? Are you taking any IR readings as they are baking?
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Harleydad
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Re: Color change after da?

Post by Harleydad » Fri Dec 29, 2017 9:06 am

duke46 wrote:
Fri Dec 29, 2017 8:46 am
Could it be that the part for some reason is getting hotter than it should? Are you taking any IR readings as they are baking?
Along with Dukes comments, are both materials the same substrate? If they are, you're oven may be getting too hot and changing the appearance of the bare metal. The oven doesn't need to be very hot to force dry a part.
What powder are you shooting on these?
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