Peroxide sources
2003-04-18 by Bill Higdon
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
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Peroxide sources
Re: [Homebrew_PCBs] Peroxide sources
2003-04-18 by Stefan Trethan
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:
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>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 > >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/ > > >
Re: Peroxide sources
2003-04-18 by rolanyang
Swimming pool suppy stores sell high concentration peroxide. ~Rolan --- In Homebrew_PCBs@yahoogroups.com, Bill Higdon <w.higdon@a...> wrote:
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> 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
Re: [Homebrew_PCBs] Peroxide sources
2003-04-18 by 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:
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> 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 > >
Re: [Homebrew_PCBs] Peroxide sources
2003-04-18 by Stefan Trethan
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:
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>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 > >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/ > > >
Peroxide and sulfuric sources
2003-04-19 by twb8899
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
Re: [Homebrew_PCBs] Peroxide and sulfuric sources
2003-04-19 by Stefan Trethan
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:
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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 > > > > > > > > > > >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/ > > >