AP on my way

[VolkD]

Back to topic:
Today I made a solution of 0.5l water + 100g sodium persulfate + bubbles. I put about the same amount of printed circuit boards in the solution. The etching process started at 9:15 local time, and ended around 19:30 local time. Then another two hours of filtering. The process with sodium persulfate alone is therefore slower than the one with acid.

 

[VolkD]

When I muck up a post, it is either the fat finger shuffle, or lingering issues of stroke. Of course, at my age, it could also be early onset dementia.

Oh, yes,...You don't want to know my age! I can say that I survived a stroke in 2005, I have diabetes, a stent was inserted into my heart in 2022 (infarction), I have two cancers, one in the prostate and one serious liposarcoma in the abdominal cavity.
So you can stop bragging We'll mix chemistry together.

 

[Yggdrasil]

Oh, yes,...You don't want to know my age! I can say that I survived a stroke in 2005, I have diabetes, a stent was inserted into my heart in 2022 (infarction), I have two cancers, one in the prostate and one serious liposarcoma in the abdominal cavity.
So you can stop bragging We'll mix chemistry together.

I wish you well.
And humor is a great medicine

 

[Yggdrasil]

It's very well known that we all prefer to see what we expect. And we all prefer to be happy than sad.
Coffee helps.

Note: Volk --> wolf.

I was thinking of German, Volk as people

 

[VolkD]

I wish you well.
And humor is a great medicine

Black too?
Let me see if you find it funny?
I have two cancers, the good news is I'll only die from one.

 

[VolkD]

I was thinking of German, Volk as people

My last name is wolf (Volk).

 

[Yggdrasil]

Black too?
Let me see if you find it funny?
I have two cancers, the good news is I'll only die from one.

Sorry, I did not intend to joke about it.
It is way to serious for that, I just pointed out that humor is a great medicine.
Not for healing but for the day to day life, even black.

 

[Yggdrasil]

My last name is wolf (Volk).

Does your language have something in common with German?

When I was yong we had a few summer vacations in Istria now Croatia.
If I'm not mistaken the Croation language are Slavic not too distant from Serbian.
But it seems like a century ago, so I most likely remember wrong.

 

[VolkD]

Sorry, I did not intend to joke about it.

I'm kidding myself. Everything I allow myself is allowed here. The problem is that a lot of people don't understand that.
Let's leave the joke aside... I hope I have the surgery this month.

 

[VolkD]

Does your language have something in common with German?

When I was yong we had a few summer vacations in Istria now Croatia.
If I'm not mistaken the Croation language are Slavic not too distant from Serbian.
But it seems like a century ago, so I most likely remember wrong.

Croatian is very similar to Slovenian. Most people understand both. Serbian is even more similar to Croatian. And all languages are of Slavic origin, of course. I was fluent in English, then I had a stroke. It's interesting how my vocabulary dropped dramatically. I lost even the most everyday words like "chair". I'm 69 now and I can't learn anymore, I prefer to use automatic translation (AI).

 

[Yggdrasil]

Croatian is very similar to Slovenian. Most people understand both. Serbian is even more similar to Croatian. And all languages are of Slavic origin, of course. I was fluent in English, then I had a stroke. It's interesting how my vocabulary dropped dramatically. I lost even the most everyday words like "chair". I'm 69 now and I can't learn anymore, I prefer to use automatic translation (AI).

Thanks for the clarification.

 

[haveagojoe]

Back to topic:
Today I made a solution of 0.5l water + 100g sodium persulfate + bubbles. I put about the same amount of printed circuit boards in the solution. The etching process started at 9:15 local time, and ended around 19:30 local time. Then another two hours of filtering. The process with sodium persulfate alone is therefore slower than the one with acid.

Did you heat this one? It's still quite fast compared to Copper Chloride.

 

[galenrog]

That is quite fast compared to copper chloride. In some areas of the world it may be more frugal or more practical. Keep up posted while you are learning the procedure.

 

[VolkD]

Did you heat this one? It's still quite fast compared to Copper Chloride.

Yes, of course, I have the cup on the hotplate and, in the interest of speed, I heat it up.

 

[VolkD]

That is quite fast compared to copper chloride. In some areas of the world it may be more frugal or more practical. Keep up posted while you are learning the procedure.

For me, speed is the most important thing. Unfortunately, this only works well with unsoldered printed circuits. I don't know about the ones with solder yet, but sodium persulfate is very selective for copper. It doesn't touch aluminum, for example.

 

[VolkD]

Today I tested how this method works on circuits that are partially soldered.I can say a lot, but I can't praise this. The reaction practically stops. The speed is then very similar to the speed of the standard AP process. Well, maybe a little better, but not significantly. Where there is very little solder left, the matter is still somewhat acceptable, but where there is more than 0.2mm of solder ...In such cases, the method is useless. I will have to find a good method of removing solder.
I have opened a new topic to discuss this problem.