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Chris Pile
PostPosted: Wed May 21, 2014 12:33 pm 
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Anyone ever tried that?

I did a fade test years ago on a piece of spruce. Stained both faces with red food coloring, then divided it into 8 sections, and cleared one side with TruOil, nitrocellulose lacquer, acrylic lacquer, polyurethane, Watco oil, CA, shellac, and one square unfinished. Taped the finished side to a southern facing window and left it for a couple years.

Anyone care to guess which finish faded the most, as compared to the unfinished side which was shaded?

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Michiyuki Kubo
PostPosted: Wed May 21, 2014 4:12 pm 
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Do share the results pic if possible as well

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jfmckenna
PostPosted: Wed May 21, 2014 4:36 pm 
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Watco oil?
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Alex Kleon
PostPosted: Wed May 21, 2014 5:13 pm 
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jfmckenna wrote:
Watco oil?


+1

Alex

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Chris Pile
PostPosted: Wed May 21, 2014 6:32 pm 
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Quote:
Do share the results pic if possible as well


Oh, I tossed that piece of spruce decades ago.


Quote:
Watco oil?


http://www.rustoleum.com/en/product-cat ... danish-oil

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Chris Pile
PostPosted: Wed May 21, 2014 6:33 pm 
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No guesses on the most faded?

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twick
PostPosted: Wed May 21, 2014 8:23 pm 
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Nitro? Somebody had to guess nitro. :/
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dzsmith
PostPosted: Wed May 21, 2014 8:34 pm 
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One dollar Bob.
I'd guess acrylic nitro since it is usually very clear.
I just spent $20 for a bottle of transtint so I wanna know about food coloring.

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Mike OMelia
PostPosted: Wed May 21, 2014 9:21 pm 
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jfmckenna
PostPosted: Wed May 21, 2014 10:24 pm 
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Chris Pile wrote:
No guesses on the most faded?


I guessed yeah?

I'm confused... You state that you started this experiment and after a couple year have a result yet you tossed the evidence decades ago?

Pics or it didn't happen beehive


These users thanked the author jfmckenna for the post: Michiyuki Kubo (Thu May 22, 2014 3:04 am)
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B. Howard
PostPosted: Thu May 22, 2014 7:29 am 
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But the important lesson is......they all faded.

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Haans
PostPosted: Thu May 22, 2014 7:40 am 
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I'll stick to Trans-Tint. One bottle makes a lot of dye and it's colorfast.
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Chris Pile
PostPosted: Thu May 22, 2014 10:19 am 
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Quote:
But the important lesson is......they all faded.



Ding, ding, ding!
We have a winnah!

The test was inconclusive.... thus the tossed spruce. Even the spruce on the back of the board faded. When I peeled off the tape - the true vivid red was revealed. All of it faded - some more, some less.

It might have been different with another color - blue, maybe. But red fades really easily in the sun.

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dzsmith
PostPosted: Thu May 22, 2014 12:10 pm 
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Haans wrote:
I'll stick to Trans-Tint. One bottle makes a lot of dye and it's colorfast.

Except purple. Sunlight faded all of the blue in it. Ended up red.
the bottle does say interior use only.

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Haans
PostPosted: Thu May 22, 2014 6:21 pm 
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I stick to yellows and browns...
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Beth Mayer
PostPosted: Sun May 25, 2014 5:25 pm 
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There was a great (long) article in the Big Red Book 6 P 368 "Constructing the Spanish Rosette by Eugene Clark. He gave a lot of detail on how he dyes his veneers (and it's far from an exact science the way he describes it) and talks about needing a mordant with some colors to colorfast. This may not be the same thing as uv-induced fading, but your post brought it to mind, so I thought I'd mention the article…lots of good detail.
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Chris Pile
PostPosted: Sun May 25, 2014 6:42 pm 
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Quote:
There was a great (long) article in the Big Red Book 6 P 368 "Constructing the Spanish Rosette by Eugene Clark. He gave a lot of detail on how he dyes his veneers (and it's far from an exact science the way he describes it) and talks about needing a mordant with some colors to colorfast. This may not be the same thing as uv-induced fading, but your post brought it to mind, so I thought I'd mention the article…lots of good detail.


Hadn't thought of that.... needed something to make it colorfast.

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WaddyThomson
PostPosted: Mon May 26, 2014 8:56 am 
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Even red cars fade faster than other colors.

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Chris Pile
PostPosted: Mon May 26, 2014 8:57 am 
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Quote:
Even red cars fade faster than other colors.


Very true.

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