40% Hydrogen Peroxide?
What?, do I read that right 40% hydrogen peroxide???
Come on, leave that stuff in the laboratory. Use ferrichloride or Ammonium- or sodiumpersulfate.
Are you tired of life?
http://www.setonresourcecenter.com/msds/docs/wcd0001d/wcd01d3c.htm
http://www.bu.edu/es/labsafety/ESMSDSs/MSHydPeroxide.html
http://msds.fmc.com/msds/100000010225-MSDS_US-E.pdf
AuroraB said:
What?, do I read that right 40% hydrogen peroxide???
Come on, leave that stuff in the laboratory. Use ferrichloride or Ammonium- or sodiumpersulfate.
Are you tired of life?
http://www.setonresourcecenter.com/msds/docs/wcd0001d/wcd01d3c.htm
http://www.bu.edu/es/labsafety/ESMSDSs/MSHydPeroxide.html
http://msds.fmc.com/msds/100000010225-MSDS_US-E.pdf
That recipee is from the old reference handbook for radio engineers,- along with alot of others....
I have used it often, when in a hurry and our machines are down...
No problem at all, if you know the hazards...
For the 40% peroxide,- here in Norway 35% is standard strength at the local pharmacy....I just add a small dash more than the 1 part...
And I do use sodium persulphate in my machines at work...
Ferric chloride makes nasty stains on my clothes,- the persulphate just makes nice holes....
I have used it often, when in a hurry and our machines are down...
No problem at all, if you know the hazards...
For the 40% peroxide,- here in Norway 35% is standard strength at the local pharmacy....I just add a small dash more than the 1 part...
And I do use sodium persulphate in my machines at work...
Ferric chloride makes nasty stains on my clothes,- the persulphate just makes nice holes....
I bought the H2O2 (30%) but have not found a source for the HCl.
So had no possibility to try it yet.
Conrad is pulling away more and more chemicals from their catalogue. And this mixture of HCl and H2O2 is cheaper, gives better results and will be available long after conrad and others have stopped supplying etchants.
And why buying those expensive TL-tubes ?
Go to a bazaar or 2nd hand shop and you buy a sun-tanner thingy for 10-15 euro/dollar.
grtz
Simon
So had no possibility to try it yet.
Conrad is pulling away more and more chemicals from their catalogue. And this mixture of HCl and H2O2 is cheaper, gives better results and will be available long after conrad and others have stopped supplying etchants.
And why buying those expensive TL-tubes ?
Go to a bazaar or 2nd hand shop and you buy a sun-tanner thingy for 10-15 euro/dollar.
grtz
Simon
over here "Muriatic Acid" -- HCL -- can be bought at most hardware stores -- just as you state for cleaning brick and stonework.
I use H2O2 from the pharmacy -- straight, then add HCL -- works without heating.
FeCl stains everything and is not good with stainless steel sinks.
whichever etchant you use, make sure to dilute the effluent with A LOT OF WATER --
and of course ACID to WATER and not the reverse.
jack
I use H2O2 from the pharmacy -- straight, then add HCL -- works without heating.
FeCl stains everything and is not good with stainless steel sinks.
whichever etchant you use, make sure to dilute the effluent with A LOT OF WATER --
and of course ACID to WATER and not the reverse.
jack
I know ! I needed for my "etching machine" about 5 liters of that stuff. Separate bags would be quite expensive.
They had a larger container (2kg) in theit catalog also , but due to new regulations in the "voedsel en waren wet", it was not allowed to carry this item anymore because the manual was in german.
Per tube ?
Or per set with loads and starters ?
grtz
Simon
Etching and PCB making Tools
Hi Simon, yes the Euro 10.50 is per tube.
Farnell has Fine Etch Crystals bags making 5l of solution. They sell in quantities of 1+/10+/25+/50+. Partnumber 3205022. Price Euro 37.55 ex BTW for the 1+ group.
Display Elektronika shops or "De Onderdelenspecialist" have 1.1kg bags of fine etch crystal for Euro 38.68 each
What are you planning? I feel your etching machine is way oversized.
blu_line said:
Hi Simon, yes the Euro 10.50 is per tube.
Farnell has Fine Etch Crystals bags making 5l of solution. They sell in quantities of 1+/10+/25+/50+. Partnumber 3205022. Price Euro 37.55 ex BTW for the 1+ group.
Display Elektronika shops or "De Onderdelenspecialist" have 1.1kg bags of fine etch crystal for Euro 38.68 each
What are you planning? I feel your etching machine is way oversized.
Mine does 2 gallons, every refill takes 4 lbs of NatriumPerSulfate.
That stuff works just fine, i see no need for using Seno material.
Conrad markets the kristals under #551970/#152014.
Anything other than that nasty ferro stuff should be just fine i think, seems that the majority is still using clothing dye.
That stuff works just fine, i see no need for using Seno material.
Conrad markets the kristals under #551970/#152014.
Anything other than that nasty ferro stuff should be just fine i think, seems that the majority is still using clothing dye.
Sodiumpersulfate
It's sodiumpersulfate in English...
# 152014 did not yield any result on www.conrad.nl
2kg of sodiumpersulfate for Euro 18.13 is a good price! (part# 551970)
Thanks for the hint.
One bag of Seno stuff, weighing 238g is about Euro 8.
Jacco,jacco vermeulen said:
It's sodiumpersulfate in English...
# 152014 did not yield any result on www.conrad.nl
2kg of sodiumpersulfate for Euro 18.13 is a good price! (part# 551970)
Thanks for the hint.
One bag of Seno stuff, weighing 238g is about Euro 8.
#152014 is the number on the container, the other is the Conrad ordering code.
Thank you for correcting me, Elso, i mentioned the Natrium supposing Conrad lists it as such.
Could be that Seno's may be fractionally better.
As the fish bassin in my residence, referred to as an etching tank by the manufacturer, requires loads of the stuff sodiumpersulfate works for me.
I thought of acquiring a smaller tank for ocassional small PCB's
(mine takes 20" boards), Seno still seems pretty expensive.
I started my etching with a plastic tray on the kitchen sink with Seno crystals and the Seno PCB manufacturing manual.
Switching to lower priced etching substances seemed to work with equal results.
The horrible brown iron stuff i bought once, the odor turned me off !
However, i am interesting in reading any advantages of Seno compared to other brands.
Thank you for correcting me, Elso, i mentioned the Natrium supposing Conrad lists it as such.
Could be that Seno's may be fractionally better.
As the fish bassin in my residence, referred to as an etching tank by the manufacturer, requires loads of the stuff sodiumpersulfate works for me.
I thought of acquiring a smaller tank for ocassional small PCB's
(mine takes 20" boards), Seno still seems pretty expensive.
I started my etching with a plastic tray on the kitchen sink with Seno crystals and the Seno PCB manufacturing manual.
Switching to lower priced etching substances seemed to work with equal results.
The horrible brown iron stuff i bought once, the odor turned me off !
However, i am interesting in reading any advantages of Seno compared to other brands.
In Holland you can buy HCl at the pharmacy (de apotheek dus), Hydrogenchloride in low concetrations is practically harmless. On an open wound it feels like pooring cocacola on it, it burns, but nothing else. If you accidently swallow it, eat a piece of old fashioned handsoap. Not the liquid stuff most people use today, but the soap you used to see ten years ago.
Greetz Mark
Greetz Mark
Just tried some Ferric Chloride last night.
Only took about 10mins to finish. It helps to rub the copper with something while its etching, the board may look untouched, but you rub it and then you see most of the copper has dissolved.
Used the microwave very carefully to get it to 50C. Only needed 2 heating sessions total (about 20s each).
Only took about 10mins to finish. It helps to rub the copper with something while its etching, the board may look untouched, but you rub it and then you see most of the copper has dissolved.
Used the microwave very carefully to get it to 50C. Only needed 2 heating sessions total (about 20s each).
Huh?
Hydrogen peroxide is a commonly used antiseptic (when diluted with water). It's water with an extra oxygen atom -- H2O2 -- it is useful for being a strong oxidizer.
Carcinogen means it causes cancer, it's a very common English word. jackinnj posted (second post in this thread) that a diluted mix of hydcrochloric acid and hydrogen peroxide can be used to quickly etch copper for PCB making, so I thought it was irresponsible not to post a warning that the latter can cause cancer.
Hydrogen peroxide is a commonly used antiseptic (when diluted with water). It's water with an extra oxygen atom -- H2O2 -- it is useful for being a strong oxidizer.
Carcinogen means it causes cancer, it's a very common English word. jackinnj posted (second post in this thread) that a diluted mix of hydcrochloric acid and hydrogen peroxide can be used to quickly etch copper for PCB making, so I thought it was irresponsible not to post a warning that the latter can cause cancer.
It's been a while since I took chemistry, but my guess is the blue is copper sulfate. Good stuff to kill off the algae in your aquarium (but will also hurt some aquarium plants and invertebrates like snails and shrimp, though fish should be fine if concentration is limited, but that's difficult to calculate as hard water inactivates much of the copper). I've also used it mixed with lime to make Bordeaux mixture, which was somewhat effective for dealing with the inevitable (in wet Vancouver and using non-resistant heirloom varieties) blight on my tomato plants. Though in the end I still had to use chlorothalonil (so much for avoiding nasy chemicals). And of course, this is a good demo of a totally off-topic post
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