yes, press and peel blue. I haven't tried aluminum but I plan to in
the future. I don't think the alloy would make much difference in
terms of getting the pnp to stick (although it ∗might∗ make a small
difference during etching). I generally use 6061 for machining and
5052 for sheet metal and bending applications. Aluminum tends to form
an tough oxide layer very quickly (aluminum oxide is sapphire, yo).
And I bet heating it only makes this worse, but I'm no material
scientist so take this with a grain of salt. Also your large surface
area can't be helping. The fact that you're getting it to stick at all
suggests that it can be done. Its just a matter of developing a
procedure that works.
>
> Thank you for the reply. Do you use pnp? I normally use the steel
> pads with the soap in them, like a SOS off-brand. I have not tried
> acetone yet. I tried an iron first because this is how I always do
> PCB traces with perfect traces. That did not work. The I tried a
> vacuum heat press 2 times without any luck. That gets in 100% flat
> but still is not allowing a full transfer. It is blotchy and only
> doing about 1 inch areas with no area having a large portion of
> correct transfer.
>
> I see that you are using brass. Have you tried aluminum? And do you
> think that it needs to be a certain type of aluminum? I am trying a
> 8x16in size which is taking 2 sheets of pnp for each attempt.
>