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Could it be a photoresist that develops with an alkali process? Sodium Hydroxide perhaps? NaOH Sam Reaves ARS W3OHM Owner / Moderator of: LeCroy Owners Group on 开云体育 Sencore Owners Group on

Alas not, I've tried both acetone and IPA and they don't touch it. I'll try MEK but I'm reluctant to try paint stripper because of methylene chloride toxicity. Morris

Acetone will do a quick job of this. Tom

I used to use 99% IPA to remove resist after exposing and etching PCBs. Leon

Hi all, I picked up a large sheet of surplus single sided copper clad board that is coated with a reddish colored photoresist. I don't know anything about it or whether it's positive or negative. I

The idea of using brass...

I like it !!!!!!

I never got into the whole hashtag thinking either. <alienrelics@...> wrote:

It doesn't matter, I cannot get consistent use of the hashtags. I did some experiments on the Electronics101 list, and they all failed. -- Steven Greenfield AE7HD

You've got ferric Chloride or something similar, so use your toner transfer on thin copper or brass sheet the very first stencils I made were on 0.15mm brass sheet, but that is thicker than what is

0.075 mm brass?????? use your toner transfer and etch using your normal pcb etching chemicals

https://youtu.be/JWUJtmgh55M Looked really interesting.

https://www.youtube.com/results?search_query=solder+stencil+diy

Normally the “Paste Layer” is part of the Gerber files so only turn on that layer. To avoid confusion, note that the Paste layer is different from the solder mask layer. Bertho Sent: Sunday,

Received from Jim Pruitt at 10/10/2021 08:09 UTC: I wouldn't count on hydrochloric acid and hydrogen peroxide having much effect on most stainless steel. For sure I'd test it on a piece before going

Don't most PCB CAD programs include the ability to generate a solder mask? If not, I'd think you could generate an image of the PCB with nothing but the pads. -- Steven Greenfield AE7HD

I don't understand this Hashtag thing. What is happening? -- -- The only difference between men and boys, is the price of their toys.

Steven, have you found a page with the various smt IC footprints shown?? I was in need of several temples but realized that if I can find some thin sheetmetal stock (like K&S and others sell) then

Here's one source that a quick Google search found: < https://www.soldering-shop.co.uk/index.php/solder-stations-obsolete-bits/bits-for-obsolete-soldering-irons.html > I suspect one of the auction

Can anyone advise me where I can obtain some ??? Regards Dave