Titanium White - Winsor & Newton Artist Oils - WARNING: SOLVENT

This topic has 141 replies, 20 voices, and was last updated 5 years, 4 months ago by dupliKate.

Viewing 15 posts - 61 through 75 (of 142 total)

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May 9, 2019 at 6:42 am #824324
Richard P
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Hold on.. we don’t know that it doesn’t contain a solvent at all. It’s going to be (hopefully) tested in that batch.

And I’m not sure why you are assuming that an alkyd would be a solvent free version?
May 9, 2019 at 6:44 am #824303
Raffless
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It is a bit obsessional though. You can take things to the extreme. Such a tiny amount is not going to kill anyone. There are times when a bit of rationality is needed.
May 9, 2019 at 6:56 am #824245
Anonymous
Hold on.. we don’t know that it doesn’t contain a solvent at all. It’s going to be (hopefully) tested in that batch.

And I’m not sure why you are assuming that an alkyd would be a solvent free version?

If Winsor Newton was using an alkyd in this paint that required solvent for dissolution, then they would have reported that it does contain a solvent.
They said in their response that it does not contain any significant solvent.
So if they are in fact using an alkyd in this paint, which I personally doubt, then it would obviously be one that does not require any solvent, unless they are lying to you.

You are right that a particular batch could possibly be accidentally contaminated.
May 9, 2019 at 7:12 am #824325
Richard P
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Perhaps I’m just a bit more cynical about most art companies (Golden being the only exception)..
May 9, 2019 at 9:11 am #824304
Raffless
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If Winsor Newton was using an alkyd in this paint that required solvent for dissolution, then they would have reported that it does contain a solvent.
They said in their response that it does not contain any significant solvent.
So if they are in fact using an alkyd in this paint, which I personally doubt, then it would obviously be one that does not require any solvent, unless they are lying to you.

You are right that a particular batch could possibly be accidentally contaminated.

How can a batch be contaminated? In a biscuit factory maybe but its hard to believe solvents are kept next to the pigments in the chain. Perhaps 0.01% chance 😏
May 9, 2019 at 5:51 pm #824284
Pinguino
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I found the odor threshold for [URL=https://hazmap.nlm.nih.gov/category-details?table=copytblagents&id=179]Stoddard solven[/URL]t, the bog standard mineral spirits solvent, (not low odor solvent).
It is 1 ppm, or 0.1%,the level reported by Winsor Newton is apparently 0.01% or 0.1 ppm, or ten times less than the odor threshold, that minutely low amount should not be what the smell is coming from, as Winsor Newton has indicated in their response.

Actually, 1ppm = 0.0001%. And so forth.
May 9, 2019 at 10:21 pm #824246
Anonymous
yes, you are right Pinguino, sorry, I quickly did that in my head and was thinking 1 per thousand instead of 1 per million, so my bad.
Then that level of 0.01 % is above the odor threshold and could be detected.

How can a batch be contaminated?

somebody could do something like clean out the equipment with a solvent and then make a batch with some residual solvent remaining.
May 12, 2019 at 6:07 pm #824326
Richard P
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Just an update:

I tested 4 titanium whites (including W&N Artist oils) on non-absorbent PET-G plastic with a digital scale that is accurate (supposedly) to 0.01g. After waiting 2 hours I remeasured all of them again and found that all 4 samples were within +/- 0.04g.

So unless I’ve done something wrong and not used enough paint it seems there isn’t a solvent in there despite the smell..
May 13, 2019 at 10:40 am #824327
Richard P
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Ok, I tested it one more time with a lot more paint on there.

When I first applied the paint and weighed it weighed at 34.86g. When I took a picture a few minutes later it seemed to be 34.78g, and it now after 5 and a half hours drying it stays around 34.68g

The scales got good reviews but not sure if they are quite reliable enough as it seems to be +/- 0.04 accuracy to me..

Anyway, it seems to be a 0.1-0.2 g weight loss. No idea if that indicates a solvent or not anymore!
May 13, 2019 at 10:54 am #824257
tiago.dagostini
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Thats a good point. Id doubt even a police sniffer dog could ‘out’ the rogue agent

now you are underestimating a dog :P They can smell WHO handled the paint tube from the factory to your hands

"no no! You are doing it all wrong, in the internet we are supposed to be stubborn, inflexible and arrogant. One cannot simply be suddenly reasonable and reflexive in the internet, that breaks years of internet tradition as a medium of anger, arrogance, bigotry and self entitlement. Damm these internet newcomers being nice to to others!!!"

"If brute force does not solve your problem, then you are not using enough!"
May 13, 2019 at 11:02 am #824290
RomanB
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it seems to be a 0.1-0.2 g weight loss

Maybe more since oil paint which is made of only oil and pigment gains weight during initial stages of drying.
May 13, 2019 at 11:37 am #824328
Richard P
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Ok. Is it worth waiting and testing again? The smell isn’t so strong now,
May 13, 2019 at 11:50 am #824291
RomanB
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Ok. Is it worth waiting and testing again? The smell isn’t so strong now,

Most solvent should already evaporate after five hours.
May 13, 2019 at 12:15 pm #824262
Gigalot
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Maybe more since oil paint which is made of only oil and pigment gains weight during initial stages of drying.

I need about 12 hours (not less) to remove solvent odor from such paint. The odor reminds me Stoddard solvent + some naphthalene aroma
May 13, 2019 at 1:32 pm #824292
RomanB
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I need about 12 hours (not less) to remove solvent odor from such paint. The odor reminds me Stoddard solvent + some naphthalene aroma

It turns to be not that bad, you buy two at a price of one: a paint and a moth repellent in one tube!
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