Why does aluminum foil have one shiny side and one with a matte finish?
bookofjoe2.blogspot.com21 points by surprisetalk 5 days ago
21 points by surprisetalk 5 days ago
so if you skipped the final rolling it would be shiny on both sides?
is this being produced?
> Yet many people persist in calling aluminum foil "tinfoil."
> We chemists get annoyed at things like that.
> Now, about aluminum foil.
Actually, most chemists are profoundly annoyed at the Americans' inability to spell aluminium properly...
Sir Humphry Davy first isolated the stuff and he called it aluminum, so that's good enough for me.
IUPAC recognizes both spellings.
Also, speak up, we can't hear you from all the way up here ON THE MOON.
Did visiting the moon damage your hearing? Last I checked there haven’t been any Americans on the moon for over half a century.
Perhaps if you used the metric system…
They do use the metric system at NASA maybe that’s why they haven’t been back to the moon.
Yes but their US contractors don’t all use metric, which is what caused them to miss Mars that one time.
I always heard the shiny side reflected heat better. So that side should face food you are trying to heat up in the oven.
Any truth to that I wonder?
No. Aluminum foil has the same material properties with respect to convection and conduction of heat no matter which side faces out. The only heat that would be different would be radiated heat, which your food won't have a ton of, and even then, the dull side is still quite reflective. It's maybe one of those "technically" correct statements that the shiny side reflects more heat, but for the application of cooking, the impact is effectively zero. The retention of steam is going to be such a larger factor the side you use will effectively make no difference.
I can speak for myself: when I ask if the shiny side reflects the heat better, I don't mean to also ask if the difference is significant. It's really just curiosity, whether my school physics intuition holds up or lies to me, that's all.
So, "technically yes" is good enough answer for me.
Is it technically true, though? The matte side has a difuse reflection, which does not mean it reflects less. It just scatters more.
Which side is better at reflecting woke beams from space?
People deeply understand the physics of tinfoil hats. A properly constructed tinfoil hat needs two layers, with the shiny sides facing in opposite directions. Only the shiny side reflects brain waves. You need to reflect in both directions: one direction keeps the government from using waves to put ideas in your head; the other is to keep the government from reading your mind.
“The final rolling is therefore done on a sandwich of two sheets, face to face.”
Whomever wrote that clearly has never made or eaten a sandwich. Without something in between the two layers, it’s hardly a sandwich.
An open sandwich can have two layers.
that's not a sandwich, it's a pizza
A pizza is an open sandwich
No, pizza is a toast per Cube Rule - https://cuberule.com/
Toast is an open sandwich, unless it has no topping, in which case it is just bread. Also their definition of cake as having multiple layers makes no sense, and would rule out most actual cakes.