Homebrew_PCBs

I just had a brain fart folks. Some of the health food stores used to
sell Hydrogen Peroxide,
cant remember if it was 10% or 30%. Might be a good source for us home
body PCB
fabricators ;>)
Bill Higdon

i really believe it may be available through haircutteres supply.

i wanted to ask the guy who's relatives is someone a haircutter but can't reach him.
i'll ask as soon as possible.

@bill:
are you sure it wasn't 2% (or 0,2?)?
i know it's also sold for medical desinfection purposes, there it is in very low concentration.

it would be really, really interesting to which amount stabilizers such as acetanilide can stabilize the
H2O2 and how long they keep it from vanishing into air.
I'm just at figuring out that by searching in the web but if anyone knows...
if it can't stabilize for lets say a week it's not of big help.. but it may also keep the needs for H2O2
down when etching (because it isn't lost into air)

tom writes technical H2O2 is already stabilized but as i get it it's not, it's transparent. and i know
no source where it is already stabilized...


regards
st






18.04.2003 18:34:27, Bill Higdon <w.higdon@...> wrote:

>I just had a brain fart folks. Some of the health food stores used to
>sell Hydrogen Peroxide,
>cant remember if it was 10% or 30%. Might be a good source for us home
>body PCB
> fabricators ;>)
>Bill Higdon
>
>
>
>
>Be sure to visit the group home and check for new Bookmarks and files:
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Swimming pool suppy stores sell high concentration peroxide.

~Rolan

--- In Homebrew_PCBs@yahoogroups.com, Bill Higdon <w.higdon@a...> wrote:
> I just had a brain fart folks. Some of the health food stores used to
> sell Hydrogen Peroxide,
> cant remember if it was 10% or 30%. Might be a good source for us home
> body PCB
> fabricators ;>)
> Bill Higdon

Stefan,
I can remember someone having to take their child into an emergency room
after they gave the child some.
For a while it was a "big thing to improve oxygen levels in the body"
int the ehalth food circles.. And I know
it was stronger than the over the counter desinfectant stuff.
Bill
Stefan Trethan wrote:

> i really believe it may be available through haircutteres supply.
>
> i wanted to ask the guy who's relatives is someone a haircutter but
> can't reach him.
> i'll ask as soon as possible.
>
> @bill:
> are you sure it wasn't 2% (or 0,2?)?
> i know it's also sold for medical desinfection purposes, there it is
> in very low concentration.
>
> it would be really, really interesting to which amount stabilizers
> such as acetanilide can stabilize the
> H2O2 and how long they keep it from vanishing into air.
> I'm just at figuring out that by searching in the web but if anyone
> knows...
> if it can't stabilize for lets say a week it's not of big help.. but
> it may also keep the needs for H2O2
> down when etching (because it isn't lost into air)
>
> tom writes technical H2O2 is already stabilized but as i get it it's
> not, it's transparent. and i know
> no source where it is already stabilized...
>
>
> regards
> st
>
>
>
>
>
>
> 18.04.2003 18:34:27, Bill Higdon <w.higdon@...> wrote:
>
> >I just had a brain fart folks. Some of the health food stores used to
> >sell Hydrogen Peroxide,
> >cant remember if it was 10% or 30%. Might be a good source for us home
> >body PCB
> > fabricators ;>)
> >Bill Higdon
> >

what people do to their / their childrens body only because it sounds "modern" (don't find the really
suitable word here because i'm tired, its late, and my english is bad) but having no idea what they
really do..
i remember having it seen in kinda drug store, but more concentrated on food, body care products. it was
in the locked glass case along with hcl etc. but i don't remember concentration.
normally i don't go to these shops, i dont like them. have nothing i would need which normal supermarket
has not. (but maybe have H2O2...).

@rolan:
really great idea! i remember the "oxygen" system got very modern here, replacing Cl.
I will have a look soon. This may also have stabilizers included, don't think so?



18.04.2003 21:52:44, Bill Higdon <w.higdon@...> wrote:

>Stefan,
>I can remember someone having to take their child into an emergency room
>after they gave the child some.
>For a while it was a "big thing to improve oxygen levels in the body"
>int the ehalth food circles.. And I know
> it was stronger than the over the counter desinfectant stuff.
>Bill
>Stefan Trethan wrote:
>
>> i really believe it may be available through haircutteres supply.
>>
>> i wanted to ask the guy who's relatives is someone a haircutter but
>> can't reach him.
>> i'll ask as soon as possible.
>>
>> @bill:
>> are you sure it wasn't 2% (or 0,2?)?
>> i know it's also sold for medical desinfection purposes, there it is
>> in very low concentration.
>>
>> it would be really, really interesting to which amount stabilizers
>> such as acetanilide can stabilize the
>> H2O2 and how long they keep it from vanishing into air.
>> I'm just at figuring out that by searching in the web but if anyone
>> knows...
>> if it can't stabilize for lets say a week it's not of big help.. but
>> it may also keep the needs for H2O2
>> down when etching (because it isn't lost into air)
>>
>> tom writes technical H2O2 is already stabilized but as i get it it's
>> not, it's transparent. and i know
>> no source where it is already stabilized...
>>
>>
>> regards
>> st
>>
>>
>>
>>
>>
>>
>> 18.04.2003 18:34:27, Bill Higdon <w.higdon@...> wrote:
>>
>> >I just had a brain fart folks. Some of the health food stores used to
>> >sell Hydrogen Peroxide,
>> >cant remember if it was 10% or 30%. Might be a good source for us home
>> >body PCB
>> > fabricators ;>)
>> >Bill Higdon
>> >
>
>
>
>
>
>
>
>Be sure to visit the group home and check for new Bookmarks and files:
>http://groups.yahoo.com/group/Homebrew_PCBs
>
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>
>

I have a drum of food grade 35% hydrogen peroxide at my shop if
anyone is interested. We could put it in gallon jugs for shipping but
I'm not sure about UPS regulations on this material... it's pretty
potent stuff. I'm open to ideas if anyone wants it.

There is also a small chemical supplier near me who sells the
peroxide in gallon jugs. I'll call him on Monday and see if he ships
through UPS and post the details.

Almost any grade of sulfuric can be used if the concentration is high
enough. We used technical grade sulfuric which is 92.8% acid and
about 1.8 specific gravity.

Battery acid should work fine. Just pick up the container and if it
feels about twice as heavy as the same amount of water then it will
work. I saw a gallon jug of "sewer cleaner" the other day at a
hardware store. When I picked it up to read the label I knew it had
to be sulfuric because of the weight. Perhaps this could also be used.

If anyone wants to test out this method just use the 3% drug store
peroxide and some of this sulfuric sewer cleaner. The larger water
content of the 3% peroxide can offset the 75% amount of water needed
to make up the etchant. Just take two or three small bottles of 3%
peroxide and add some sulfuric until it starts etching.

This experiment should show how it works. No heater will be needed
since the addition of acid will heat things up as it is exothermic.


ADD THE ACID TO THE WEAK PEROXIDE SOLUTION IN THAT ORDER.

WEAR SAFETY GLASSES !!!!!!

Tom

nice offer and i would buy some if you are near me but i fear shipping would
be far more expensive then buying new.

but i have read the following:
degrading of H2O2 is less then 1% per year if stored in big tank or so. but
can get up to 2% in bottle etc. depends on stabilizer used. most H2O2 has some
sort of stabilizer added when sold (but not the one for medical use and not
the one for semiconductor manufacturer where purity is most important).

next week i will have a look at some shops who carry pool chemicals. on
several webpages i have seen H2O2 for pools, price is ok. i hope it is also
sold in shops here because it is mostly used in automatic dosaging units.

i also will check the car shops if this is clean sulphuric acid and if the
concentration is given.

but also if the sulphuric acid method has some advantages above the
hydrocloric (fallout of copper, more selective in agressing metals (can use
stainless)) i believe it would be more convenient for the amateur to use
hydrocloric because this also would allow him to bubble air instead of using
H2O2.


regards
st

19.04.2003 18:03:42, "twb8899" <twb8899@...> wrote:

>I have a drum of food grade 35% hydrogen peroxide at my shop if
>anyone is interested. We could put it in gallon jugs for shipping but
>I'm not sure about UPS regulations on this material... it's pretty
>potent stuff. I'm open to ideas if anyone wants it.
>
>There is also a small chemical supplier near me who sells the
>peroxide in gallon jugs. I'll call him on Monday and see if he ships
>through UPS and post the details.
>
>Almost any grade of sulfuric can be used if the concentration is high
>enough. We used technical grade sulfuric which is 92.8% acid and
>about 1.8 specific gravity.
>
>Battery acid should work fine. Just pick up the container and if it
>feels about twice as heavy as the same amount of water then it will
>work. I saw a gallon jug of "sewer cleaner" the other day at a
>hardware store. When I picked it up to read the label I knew it had
>to be sulfuric because of the weight. Perhaps this could also be used.
>
>If anyone wants to test out this method just use the 3% drug store
>peroxide and some of this sulfuric sewer cleaner. The larger water
>content of the 3% peroxide can offset the 75% amount of water needed
>to make up the etchant. Just take two or three small bottles of 3%
>peroxide and add some sulfuric until it starts etching.
>
>This experiment should show how it works. No heater will be needed
>since the addition of acid will heat things up as it is exothermic.
>
>
>ADD THE ACID TO THE WEAK PEROXIDE SOLUTION IN THAT ORDER.
>
>WEAR SAFETY GLASSES !!!!!!
>
>Tom
>
>
>
>
>
>
>
>
>
>
>Be sure to visit the group home and check for new Bookmarks and files:
>http://groups.yahoo.com/group/Homebrew_PCBs
>
>To unsubscribe from this group, send an email to:
>Homebrew_PCBs-unsubscribe@yahoogroups.com
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>