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Thanks to everyone who replied! I do regenerate the solution by bubbling air through it from an aquarium pump but when I'm etching a board the solution gets darker faster than it can regenerate so I

As I remember this stuff didn't have any silver in it. So just dump it in the toilet and follow it with plenty of water. Keep it off metal fixtures if it has any HCl or other acid with it. Or dump it

If you really must use 35% peroxide - it's really dangerous stuff in inexperienced hands - you can just add a little of the copper chloride etching solution to the SMALL PORTION of peroxide plus

On 1/5/22 9:30 pm, Morris Odell wrote: > Hi all, > I've been using the regenerated copper chloride method for etching PCBs for years and have had very good results. One problem I do have though is

I have never used the pool solution but it is good to know where to look for large volumes at less than sky high prices. A quick google indicates that adding a little NCl table salt, to the mixture

Obviously, I've kept it too long. Now to dispose of it safely. Don't underestimate birthdays - People who have the most seem to live longest . . . . . sent from my Galaxy Tab A

Obviously depends on how long "some time ago" has been. I used to work in a lab and unopened 35% peroxide should be plenty strong even after a year... though I never bought more than a month's supply

The concept of the reactivity series isn't applicable because... long before the silver nitrate can contact the copper to plate out silver, the silver nitrate will react immediately with chloride in

Another peroxide question: how long can unopened peroxide be stored? Does it deteriorate? Some time ago I got a quart of 35%, then got sidetracked. Is it still usable? Don't underestimate birthdays

If your solution needs a boost during etching, perhaps the volume of solution used is too small. Or perhaps I'm misunderstanding and all you're looking for is overall faster etching than you would get

You can also just bubble air through it. My understanding is that oxygen is the thing that hydrogen peroxide adds to the mix. Have it far away from anything affected by the solution, though, as

Have you been regenerating it by bubbling air through the solution? I've bee using it for years as well and have never found a need to add any hydrogen peroxide. I use a fish tank bubbler and bubble

Morris, I was curious why the stuff contained silver nitrate, looks like the sliver must form nano particles when used for disinfection purposes and the metallic silver likely reacts with the peroxide

Hi Morris, If you look for the reactivity series of metals, you'll find out that the silver in the silver nitrate will exchange places with the copper in the PCB. Since that silver will not be

Hi all, I've been using the regenerated copper chloride method for etching PCBs for years and have had very good results. One problem I do have though is getting adequate supplies of hydrogen

Steven Greenfield AE7HD <alienrelics@...> added the album Commodore PET CNC Drill by Janwrl: Janwrl wrote a custom program to take drill files on his Commodore PET and drill them using his

Anycubic must be moving to larger, higher res, because the Photon is only $99 now, only in the USA. 47um XY resolution, a 2k screen so it is 2560x1440 pixels. I own

I hadn't checked dry film photoresist prices for a long time. I see loads of it in small rolls, now. I wonder about the quality, though. Even Amazon has rolls, although they are not Dupont. I wonder

It's pretty simple, quick, and gives a decent result. What's not to like? The hard part is having a 3D resin printer, but anyway. As usual, show us how much better yours is. Tony

If you're trying a single layer, you can argue whether or not the chip will be stable without a ground plane.? However, you may find the layout very difficult (if not impossible) to do.? Of