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tung oil (Read 693 times)
 
joe zarnitz
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tung oil
Jun 10th, 2016 at 5:48pm
 
will it gel in can over time or should I decant it into smaller bottles ---tks,joe
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Don Stephan
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Re: tung oil
Reply #1 - Jun 10th, 2016 at 7:22pm
 
First, is it PURE tung oil or a "tung oil finish?"
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joe zarnitz
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Re: tung oil
Reply #2 - Jun 11th, 2016 at 8:02am
 
minwax tung oil
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Ron Sardo
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Re: tung oil
Reply #3 - Jun 11th, 2016 at 9:04am
 
No tung oil in that brand
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joe zarnitz
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Re: tung oil
Reply #4 - Jun 11th, 2016 at 9:11am
 
can says minwax tung oil finish---what does it contain?
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Ron Sardo
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Re: tung oil
Reply #5 - Jun 11th, 2016 at 10:27am
 
If the product contained tung oil I'm sure Minwax would proudly list it in their MSDS, instead they only list "Mixture", which could be anything.

Sadly, many manufacturers have been replacing boiled linseed oil and tung oil (2 preferred drying oils) with a cheaper non-drying soy oil and cobalt driers. Cobalt is listed on the MSDS because it is a hazard material.

They get away with this by calling the product a tung oil finish. If it was really tung oil they would call it simply Tung Oil.

MSDS = Material Safety Data Sheet
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Ed Weber
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Re: tung oil
Reply #6 - Jun 11th, 2016 at 10:37am
 
joe zarnitz wrote on Jun 11th, 2016 at 9:11am:
can says minwax tung oil finish---what does it contain?


Most likely, linseed oil.
If a manufacturer won't tell you what's in their product, it should probably raise a red flag.
(it's not just Minwax, many other manufacturers are guilty as well)

It's my understanding that a law was passed that only requires manufacturers to list ingredients that are designated as hazardous. You can see for yourself in the pdf.
"There are no additional ingredients present which, within the current knowledge of the supplier and in the
concentrations applicable, are classified as hazardous to health and hence require reporting in this section"
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They're not required to list anything else, so they typically don't.
If you want tung oil, make sure it's listed by name as an ingredient, otherwise you're just guessing.
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Ron Sardo
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Re: tung oil
Reply #7 - Jun 11th, 2016 at 11:09am
 
Good Article

Myth #1
Tung oil was brought into the states during WWII from China when the military learned that this was an excellent finish and is used to waterproof their boats (junks). Tung seeds were brought in and grown in Florida in the early 40s. Back then this was called China Oil

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Mark Putnam
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Re: tung oil
Reply #8 - Jun 14th, 2016 at 1:48pm
 
I saw this question and read through it because I do have a one-quarter bottle of pure tung oil that I never got around to opening. What's the shelf life on it, and when should I consider getting rid of it?
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Ron Sardo
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Re: tung oil
Reply #9 - Jun 14th, 2016 at 2:24pm
 
Place a drop on a piece of glass and if it dries about the same time as the rest of the bottle did, its still good.
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