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UV protection coating - secret inscription

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Forum topic by chomin posted 01-19-2015 04:03 PM 634 views 0 times favorited 1 reply Add to Favorites Watch
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chomin

1 post in 683 days


01-19-2015 04:03 PM

Hello everyone!
I am looking for a coating which would help me execute a concept ilustrated in the picture.

It is about application of an UV filter (or something else) over a stencil with text. Then put this piece of wood under the sun and capture the process of a darkening of a wood where the uv filter is not applied.
However, it is necessary that initially (before illumination) you cannot recognize where the filter is applied.
The result would be revealing of a “secret inscription” after some time.

The object with that use will be situated in interior.

For now I tried to apply some matte transparent stain (glaze) with UV protection over stencil, but i can easily see the difference between treated and non treated wood. (of course!). – treated is little bit darker and glossy (although is should be matte). And also after sun, the uv protection coating did not stop darkening at all.
So i tried again apply the same stain over stencil, then i treated whole wood plate with stain without UV protection. I can berely see where the UV is applied (good!), but the result after sun is again bad – the part with UV came to dark as well. :(
Maybe it is because bad stain with UV protection. but I tried two different kinds of them.
Now i am thinking about trying the Mr.Super Clear UV Cut Flat Spray.

I am open and glad for any ideas how to make it. Thanks a lot!


1 reply so far

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pjones46

986 posts in 2102 days


#1 posted 01-21-2015 12:52 AM

Transparent UV protection is a farce. You must have solids in the coating to block UV, the more the solids, the better the UV protection. A clear so called wood coating with UV protection will still be effected by the sun but at a slower rate than untreated wood. Eventually the effect of the sun will balance out the discrepancies.

Think you might be on the wrong track. Try talking with someone who is a photograph wizard. I think you would be more successful looking for something clear that will get darker as the sun hits it. In other words, the more UV the darker it gets. Look at this LINK as thsy have produts to develop pictures on surfaces using sunlight.

-- Respectfully, Paul

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