MegaSack DRAW - This year's winner is user - rgwb
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Why does paper become translucent when you get oil on it?
What have your broken?
All the "rough" bits of fibre line up. Instead of scattering the light completely, they let some through the "gaps".
One for the chemists, surely? 🙂
Because the oil acts like a fibre optic*, providing a medium for the light to travel through.
*Thats a guess btw
Think of a piece of wool. It's normally quite "furry". But if you dampen it, it actually looks thinner as all the loose fibres line up. Same with paper. Different compounds will be more or less transparent - things like china content or the amount of rag will affect the results.
druidh - are you a physicist then?
FallOutBoy - Memberdruidh - are you a physicist then?
Nah - but I'm a crap rider too. Disnae stop me talking pish on here all day....
druidh - MemberFallOutBoy - Member
druidh - are you a physicist then?
Nah - but I'm a crap rider too. Disnae stop me talking pish on here all day....
Indeed 🙄
Glad to see your free time on retirement is not being wasted Druidh
Just spreading the benefit of my knowledge and experience Al (I actually do know an incredibly boring amount of detail regarding the manufacture of paper). Just don't ask about Bendtsen roughness tests....
I suspect it's not the fibres lining up TBH, I dont think they'd move (much). What I suspect is it is something to do with the relative differences in refractive index of the air and the oil and the paper, but I cant explain how I mean without some further thought. Just my hunch at a guess.
Just spreading the benefit of my knowledge and experience Al (I actually do know an incredibly boring amount of detail regarding the manufacture of paper). Just don't ask about Bendtsen roughness tests....
Bendtsen roughness tests..googled it instead, you learn something everyday, now back to some thermodynamics!
now back to some thermodynamics
You too? How odd!
Polar/non polar bonds?
More Chemistry but no science subject is alone to explain anything-we just group it to make it easier to learn.
Reflective light properties of paper changed by oil from the fibres?
You too? How odd!
Yeah and fluids, along with some maths, electromechanics (know anything about that!???) and electrical circuits...hmm... are you one of the lucky ones too???