WetCanvas
Home Member Services Content Areas Tools Info Center WC Partners Shop Help
Channels:
Search for:
in:

Welcome to the WetCanvas forums. You are currently viewing our boards as a guest which gives you limited access to view most discussions, articles and access our other FREE features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload your own photos and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please visit our help center.

Go Back   WetCanvas > Explore Media > Oil Painting > The Technical Forum
User Name
Password
Register Mark Forums Read

Salute to our Partners
WC! Sponsors

Our Sponsors
Closed Thread
 
Thread Tools Display Modes
  #1   Report Bad Post  
Old 12-03-2005, 10:33 AM
brushmarx's Avatar
brushmarx brushmarx is offline
Senior Member
 
Join Date: Jul 2004
Posts: 274
 
Hails from United States
is linseed oil toxic? and...

Hi! Was wondering if linseed oil was toxic. Also,inregards to M Grahams' walnut oil and mediums: the bottle on the walnut oil medium says it dries faster, what does the bottle that says walnut oil do? Why do you like to use it? Is it toxic?
Thank you all! maria
__________________
maria marx
www.mariamarx.com
  #2   Report Bad Post  
Old 12-03-2005, 11:07 AM
aszurblue's Avatar
aszurblue aszurblue is offline
A WetCanvas! Patron Saint
Citrus Heights, CA
 
Join Date: Sep 2004
Posts: 3,251
 
Hails from United States
Re: is linseed oil toxic? and...

I can tell you that "for me" one drop of linseed oil on my skin and I'll be sick for up to three days So have to wear gloves and be very very careful when using oils. I haven't tried the Walnut Oil yet, but would be interested in others views on this. Azure
  #3   Report Bad Post  
Old 12-03-2005, 02:11 PM
rroberts's Avatar
rroberts rroberts is offline
A WetCanvas! Patron Saint
Palm Springs, CA
 
Join Date: Aug 2004
Posts: 3,308
 
Re: is linseed oil toxic? and...

Raw linseed oil is practically non-toxic. It has historically been used as a laxative. It is well absorbed through biological membranes such as the stomach and skin. Linseed oil can be irritating to the skin and is known to contain potent allergens. Cautions against the use of boiled linseed oil are common in health literature due to toxicological concerns about its additives. Thermopolymerized linseed oil (heated to high temperatures) may be toxic to the liver.
(http://www.greenconsumer.cc)

Walnut Oil, on the other hand, is a widely used food item, but a percentage of the population have allergic reactions to some or all nuts and nut products.

NOTE! If you have health concerns about your personal experience with either of these oils, you should consult your physician.

Walnut oil drys somewhat differently than linseed, sometimes a bit faster. M. Graham's claims about faster drying might lead you to believe there's a significant difference between the two. M. Graham walnut alkyd medium, though, probably does dry faster, but it is an alkyd, therefore a quite different critter from regular walnut oil.

cheers!
__________________
-- Robert
  #4   Report Bad Post  
Old 12-03-2005, 03:58 PM
Calvado Calvado is offline
Senior Member
Montreal, Canada
 
Join Date: Sep 2005
Posts: 186
 
Re: is linseed oil toxic? and...

When I'm in shortage of olive oil, I use it (linseed oil) in my salads as a dressing.
  #5   Report Bad Post  
Old 12-03-2005, 05:39 PM
turlogh's Avatar
turlogh turlogh is offline
Enthusiast
Auburn, Massachusetts, USA
 
Join Date: Jul 2003
Posts: 1,508
 
Hails from United States
Re: is linseed oil toxic? and...

You can buy both linseed and walnut oil in health food stores (the linseed is labelled "flax seed oil"). The stuff used for paint is processed differently, but essentially the same. They are natural and non-toxic.
__________________
David Rourke

Visit my art blog
  #6   Report Bad Post  
Old 12-03-2005, 05:59 PM
dbclemons's Avatar
dbclemons dbclemons is offline
Enthusiast
Austin, TX
 
Join Date: Oct 2001
Posts: 1,786
 
Hails from United States
Re: is linseed oil toxic? and...

I understand the processing of linseed oil for painting involves adding metallic dryers which might make it somewhat toxic. Raw linseed/flax oil as a food oil is not recommended as a cooking oil but has the health benefit of omega-3 fatty acid as found in fish.

-DBC
__________________
David Blaine Clemons
----------------
My Website
My Blog
  #7   Report Bad Post  
Old 12-03-2005, 06:15 PM
gunzorro's Avatar
gunzorro gunzorro is offline
A WetCanvas! Patron Saint
Simi Valley, California
 
Join Date: Mar 2004
Posts: 3,303
 
Hails from United States
Re: is linseed oil toxic? and...

Metallic driers aren't used to process Linseed so far as I know.
It is edible and completely safe, except for slight risk of possible allergies or psychosomatic reactions. Jim
  #8   Report Bad Post  
Old 12-03-2005, 06:23 PM
Calvado Calvado is offline
Senior Member
Montreal, Canada
 
Join Date: Sep 2005
Posts: 186
 
Re: is linseed oil toxic? and...

As I said, try it in your salad... delicious lololol
  #9   Report Bad Post  
Old 12-04-2005, 05:35 AM
Einion's Avatar
Einion Einion is offline
A WC! Legend
 
Join Date: Jul 2001
Posts: 10,629
 
Hails from Hong Kong
Quote:
Originally Posted by dbclemons
I understand the processing of linseed oil for painting involves adding metallic dryers which might make it somewhat toxic.
Nope, not in the standard types.

"Boiled linseed oil" that you'd see in a hardware store will sometimes contain metallic driers though. These driers, if present, would tend to be highly toxic - cobalt and manganese are often used - but they'll come with appropriate health warnings if they do.

Einion
__________________
Do you know if your colour is off in hue, value, chroma... or all three?


Colour Theory & Mixing forum WetCanvas Glossary Search Tips Advanced Search Acrylics forum Acrylics - Information Kiosk
  #10   Report Bad Post  
Old 12-04-2005, 11:33 AM
dbclemons's Avatar
dbclemons dbclemons is offline
Enthusiast
Austin, TX
 
Join Date: Oct 2001
Posts: 1,786
 
Hails from United States
Re: is linseed oil toxic? and...

http://en.wikipedia.org/wiki/Linseed_oil
"Boiled linseed oil was used as a paint binder or as a wood finish on its own. ... However, today, metallic dryers are used instead of heat. The use of metallic dryers makes boiled linseed oil inedible."

Maybe it's just not always the case. Art supplies aren't always good about detailed labeling as for food or hardware products, to a lesser degree. There's a bottle on a grocery store shelf up the street from me that says "100% pure linseed oil" and nothing else on the label. If it's something that might be a health risk, it would be wise to try and contact the manufacturer to get more info.

-DBC
__________________
David Blaine Clemons
----------------
My Website
My Blog
  #11   Report Bad Post  
Old 12-04-2005, 11:52 AM
turlogh's Avatar
turlogh turlogh is offline
Enthusiast
Auburn, Massachusetts, USA
 
Join Date: Jul 2003
Posts: 1,508
 
Hails from United States
Re: is linseed oil toxic? and...

I don't recommend eating linseed or walnut oil sold for use in painting. If I happened to accidentally ingest a small amount, I wouldn't worry unless it was specifcally labelled as containing driers or other toxic substances.
__________________
David Rourke

Visit my art blog
  #12   Report Bad Post  
Old 12-04-2005, 02:33 PM
gunzorro's Avatar
gunzorro gunzorro is offline
A WetCanvas! Patron Saint
Simi Valley, California
 
Join Date: Mar 2004
Posts: 3,303
 
Hails from United States
Re: is linseed oil toxic? and...

Any reputable art materials maker is not going to add something toxic without telling the buyers! You won't find any quality artist linseed products with driers or toxic additives. I don't know why this is not sinking in.
Are you worried there is a conspiracy here? Jim
  #13   Report Bad Post  
Old 12-04-2005, 03:52 PM
LGHumphrey LGHumphrey is offline
A Local Legend
Near Barcelona.
 
Join Date: Apr 2005
Posts: 6,900
 
Hails from Canada
Re: is linseed oil toxic? and...

So is it OK to use the flax-seed oil from a health food shop for painting?
__________________
Lawrence Humphrey
Torrelles, Spain
  #14   Report Bad Post  
Old 12-04-2005, 05:01 PM
rroberts's Avatar
rroberts rroberts is offline
A WetCanvas! Patron Saint
Palm Springs, CA
 
Join Date: Aug 2004
Posts: 3,308
 
Re: is linseed oil toxic? and...

Quote:
Originally Posted by LGHumphrey
So is it OK to use the flax-seed oil from a health food shop for painting?

That's a good question! I don't know. However, I hesitate to recommend health-food store flax oil for painting. I bet Einion and/or Turlogh probably have more specific info on this.

For your own satisfaction, though, why not do a little test?
On a piece of glass (or similar non-absorbent surface), paint a patch of both oils. Let them dry, expose them to sun, let them sit around for a while. Then examine the film and see if one is stronger than the other, or a different color. In fact, for a more thorough test, make patches of oil alone and oil with pigment.

I recall reading somewhere that there are actually two kinds of flax produced, one specifically for the paint industry. However, I don't know if that's true, and wouldn't be able to find the reference at this point.

cheers!
__________________
-- Robert
  #15   Report Bad Post  
Old 12-04-2005, 07:03 PM
tk04's Avatar
tk04 tk04 is offline
Veteran Member
Norway
 
Join Date: Jul 2004
Posts: 625
 
Re: is linseed oil toxic? and...

The largest "problem" with artist's linseed is probably that it's self-combustible. I know about fires caused by it. A rag with linseed can start burning without any specific fire-source, like a match or some other open fire. So it's important to have a safe procedure for disposal of rags, and alike.

If you buy linseed oil, or walnut, in a food-store you wouldn't know how weel-refined it is, or the general quality of it. Artist's linseed oil doesn't cost much if you buy a larger amount of it, so it's not much to gain on buying it in food-stores.

Common sense says that one shouldn't put artist's linseed oil in food - for the same reasons - the producers aren't making them for food, but for painting, so it may contain "something", even if it normally won't.

Some people may be allergic to linseed oil. As for that, if you get too much exposed to for instance normal detergents, you can develop allergies gradually. That's not uncommon among people that make a living from washing. Nut-allergies are known to be outright dangerous.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 11:31 AM.


© 2014 F+W All rights reserved.