I’m just wondering …
will acetone dissolve away wax paper that is stuck to a gelled epoxy resin fin panel ? [I figure sanding it will only ‘embed’ the paper deeper into the resin ?]
thanks for any help !
ben
If the resin is nice and hard why couldn’t you sand it out?
"[I figure sanding it will only ‘embed’ the paper deeper into the resin ?] "
acetone and epoxy?
the tablets brought down from the mt.cocoa
sayeth :
and no acetone
shall be in contact wythe
the epoxy from god.
those infidels who transgress
will be doomed th the million
intrusive deaths.of sensitization
Thou shall only embed journalists
with Geraldo Rivera,and the
army.whom so ever has room
in their hummer.
…ambrose…
11:6
I heard that epoxy and acetone are a huge NO-NO.
Hay Ben
Acetone wont hurt the epoxy
just dont get it all over yourself, remember its a solvent and can act as a vehicle to transport diluted stuff directlly to your blood stream
Ive got no idea what it would do to wax paper,not much i would think
any waves yet?
Mike
Huge No-no because if you touch it with your bare skin it allows the epoxy to enter your blood stream easily. Also, I don’t think this applies to hardened epoxy.
What if you stuck some wax paper in a tuperware and covered it with epoxy Chip? That would tell you if it will disolve the paper. I am thinking it will remove the wax at least since I use it to clean my fin board after I’m done.
Also, if the resin is hard the paper should sand right off. I haven’t used other epoxys but the RR resin is very hard, sands very easily, and I can sand it much sooner than poly. Also, because it is so hard it doesn’t gum up paper which is a huge bonus.
I always have the melamine texture on the bottom of my panel, covered in the release wax, no wax paper but no problem sanding either especially since the bottom of the pannel is protected from the air thus no moisture thus hard resin, not sticky. This is epoxy you are talking about though so should be hard top and bottom right?
Is the epoxy you guys are using a little soft? Is that why you are afraid it will get stuck?
What if the reason it is so stuck is because the epoxy melted and evaporated the wax coating on the paper?
Have you tried a little heat (say an iron set to “low”)? If the waxed paper is only on the surface (and there aren’t any great creases) raising the temp to near the melting point of the wax may do the trick…
-Samiam
Howzit chip, Is the wax paper just stuck to the glass on top? try just scraping it off with a razor blade and any little bits left could probably be sanded off and not inbed into the epoxy. Do a test.Aloha,Kokua
VMP Naptha is good for cleaning off any was product.Lighter fluid is Naptha.Acetone is a good clean solvent and safe to use unless you are smoking or submerge your bare hands in Acetone that is contamininated with resin.(Both poly or epoxy).Clean acetone is nice stuff.Now go ahead and rant.LOL RB
"Huge No-no because if you touch it with your bare skin it allows the epoxy to enter your blood stream easily. Also, I don’t think this applies to hardened epoxy. "
There’s a great piece of misinformation. Way to go!
Acetone does NOT cross cell membranes and will NOT transport chemicals into the bloodstream through the skin barrier.
Acetone WILL have long term pulmonary effects if you subject yourself to high concentrations of the fumes for years and years. Acetone WILL leech all of the naturally occuring oils in your skin out, leaving your hands dry and prone to cracking
Chemicals WILL happily enter the bloodstream through these cracks, but it ain’t actually acetone doing the dirty work; it’s you being dirty with the acetone that’s done the work.
Acetone on cured epoxy is fine. Acetone in uncured epoxy will inhibit cure.
Sorry if this doesn’t help you in your quest to remove your wax paper Chip, but I’m getting a little sick of people spouting off stuff they don’t actually know around here…especially stuff that is really, really wrong.
Hey Chip, just put on mask and sand it off.
Try the hot gun first, as you can burn the paper before the resin will burn. You could even claim it as post curing.
Of course if you are foiling both sides then it doesn’t matter at all.
How might acetone enter my body?[/url]
Acetone will enter the body if we breathe in contaminated air, breathe in tobacco smoke, or consume food or water that contains acetone. It can also pass through the skin
http://www.npi.gov.au/database/substance-info/profiles/3.html
What happens when acetone comes into contact with my skin?
Acetone is either slightly irritating or not irritating, based on animal and limited human information. Application of 1 mL of acetone in a small glass tube to six male volunteers for 30 or 90 minutes resulted in only mild redness and swelling at 90 minutes.
The risk of developing health effects following the absorption of acetone through unbroken skin is very slight. There are several reports of people, usually young children, becoming ill following skin exposure to acetone while lightweight casts were being put on broken limbs. The symptoms experienced were similar to those described following high inhalation exposures. In all cases, a large amount of acetone came into contact with the skin for several hours and inhalation exposure may also have occurred. These reports are not considered relevant to people exposed to acetone at work.
http://www.ccohs.ca/oshanswers/chemicals/chem_profiles/acetone/health_ace.html
<a href="http://www.ccohs.ca/oshanswers/chemicals/chem_profiles/acetone/health_ace.html#top" class="bb-url"></a>
So if the question is whether acetone will pass through unbroken skin it seems the answer is yes.
Most sources say you won’t get a strong reaction to acetone unless it is in large quantities either ingested or breathed though hours of contact through the skin can also cause problems.
However, we’re not worried about acetone itself, we’re worried about absorbtion of epoxy resin causing sensitization.
Once solvents have penetrated the protective skin layers, they may quickly find their way into the blood stream. You can absorb toxic amounts in this way. If you use solvent to clean epoxy from your skin, your skin can absorb both the solvent and the dissolved epoxy. This will intensify epoxy exposure.
http://www.mrfiberglass.com/safety_information.html
Some fibre optic epoxies are strong sensitisers.
http://www.intertronics.co.uk/articles/tb007.htm
A couple of safe handling sites for specific products:
http://www.prosetepoxy.com/safety/welcome.html
http://psfcwww2.psfc.mit.edu/esh/epoxy.html
Styrene vapours from polyester resins used in fibreglass products are, however, a more serious hazard, and may cause both short term irritation and long term effects to the nervous system.
Epoxy resins sometimes used in the manufacture of fibreglass products can cause contact dermatitis and burns. Cured resins are practically non-toxic.
http://www.safetyline.wa.gov.au/PageBin/hazshazd0006.htm
It is good to note that they consider sanding dust from epoxy (less than 2 weeks old) to also be a sensitizer as the curing process is not totally complete.
Talking about polyester ink (don’t know what that is but…)
Three of six workers with dermatitis from UV-curing inks in printing plants had positive test results from the polyester methacrylate present in the inks used. The sensitizing capacity, performed with the “Guinea pig maximization test”, shows polyester or methacrylate to be a moderate sensitizer.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6179340&dopt=Abstract
Extensive Osha site talking about composites
SOLVENTS
Many of the solvents used in advanced composite processes are volatile and flammable. Most are skin and eye irritants, and some may be readily absorbed through the skin. Precautions must be taken when using organic solvents because they can facilitate the entry of toxic materials into the skin and organ systems. They may also enhance skin sensitization caused by the resin systems. Some (such as methyl alcohol) are poisonous, and all are capable of extracting fat from skin. Harmful effects from industrial exposures come principally from skin contact and inhalation.
Polyether and polyester polyols present no particular health hazard in industrial processing.
http://www.osha.gov/dts/osta/otm/otm_iii/otm_iii_1.html
So I think it is safe to say that even if you don’t have an open wound on your hand, if you want to avoid sensitization, you shouldn’t touch epoxy disolved in acetone or probably even alcohol. And if you get epoxy on your hands wash it off with soap and water as soon as possible. Polyester doesn’t seem to be as bad sensitization wise.
fellers , fellers …
if I use acetone , I wear gloves and full protection . It won’t be an issue …drop it eh ?
I only wanted to get wax paper off hicksy’s fin panel for him , but it seems he has managed to do it already , so problem solved…
cheers
ben
LOL yeah, I peeled it off…
Hay Ben
I promise i wont tell them all about all those other nasty habbits you have hehehehehe
any waves yet
came on there must be some waves by now heheheh
Hows the mal going no dings yet i hope
and when are you coming over for some waves??
mike
bad [ha]bits
no waves . I mean …NO waves.
dings in mal …compression dents on deck. Think epoxy really DOES need this oven baking they talk of here , eh ??
no money
but saving grace …
[hopefully] out to hicksy’s tomorrow [?] , to cut loose on the three fin panels I have waiting there .
need to save some $ for a new blank and gear to make a rideable thruster for me for winter.
And we have ‘popeye’ on board here now , a guy who has settled in yokine . Someone to surf with finally .
cheers for the invite and the interest Mike …and please say “hi !” to your family for me !
cheers ,
ben
…THIS JUST IN …
another wozzie , ‘sandgroper’ has arrived here at sways , too . You have been warned .
and , ‘rsl’ , ‘martijn’ , and ‘bluejuice’ still lurk here occassionally too , I’ve noticed …got ourselves a real little [dysfunctional] west australian swaylocks family happening here at the moment , eh ?