Sep 7, 2008 at 8:05 am #1231052
煮物の味がとても良く滲みこみ、美味しいです！Sep 7, 2008 at 8:35 am #1450305
@back2basicsLocale: Southeast USA
Good thinking! This will be more resilient than the aluminum foil that many people use.
After watching the video, I searched and found "food grade" silicone sheets here: http://www.rubbercal.com/Silicone_FDA.html
Keep up the good work.
ChrisSep 7, 2008 at 8:47 am #1450306
Very smart thanks Yukio
Now searching for the silicone sheets in Europe.Sep 7, 2008 at 9:09 am #1450307
simply brilliant idea! thanks for sharing.Sep 7, 2008 at 9:24 am #1450310
@nilesLocale: On the Dirt in Oregon
I've never seen this before. How well does it reduce boiling times? Does tinfoil deform?Sep 7, 2008 at 9:47 am #1450314
@halfturboLocale: Northernish California
Casey, IIRC a tight pot lid or a layer of oil atop the water yields an energy savings on the order of 30% (by reducing evaporative heat loss).
I'd welcome a more accurate value than that provided by my memory :-)Sep 7, 2008 at 10:24 am #1450317
Than expected, on relief from the heat of the water.
Feathers as well as sleeping bags, air layer is formed by the trap someone.
That, I think the effect is going up.
Multistage able to devise and better.
And, like pan, arms stretched out and
Easy to treat.
Is unsuitable for cooking elaborate.
Large-diameter pot, the effect should be even larger.Sep 7, 2008 at 2:20 pm #1450337
You guys are kidding us right???????
Had me going there for awhile Yukio. I can see that big smile on your face =)Dec 19, 2008 at 12:57 pm #1465441
I would like to get some of the 0.3mm silicone material you used in this experiment. Can you give me the specification for the type of material you used?
Thank you very much.
Denis HazlewoodDec 19, 2008 at 1:04 pm #1465446
@rcaffinLocale: Wollemi & Kosciusko NPs, Europe
Google 'silicone rubber sheet': there are tons of suppliers on the web.
cheersDec 19, 2008 at 1:20 pm #1465452
Did I read that right? 2 grams? I never really weighed a square of aluminum foil, but I'd imagine about the same weight? Minus the increase in efficiency…hmmm…so maybe if I used something like this, with a Featherfire in a Ti-Tri cone and a Titan kettle…Dec 19, 2008 at 1:30 pm #1465457
I'm investigating using this stuff. It's got to float, hence the light weight. I don't know if aluminum foil will work. Worth a try to see.
Do you only get on BPL at work?Dec 19, 2008 at 1:39 pm #1465460
@tippymcstaggerLocale: North Texas
I had success with a circle cut from a freezer bag. I assume this is safe because the plastic shouldn't get significantly hotter than when boiling water is poured into the bag.Dec 19, 2008 at 1:46 pm #1465466
Yeah, I'm pretty much on BPL when I'm at work… Does that tell you how much down-time I've had lately? Sometimes on days off, though usually if I'm in project mode or something.
I wasn't originally thinking of floating the Al, but maybe that would work, too. Interesting stuff.Dec 19, 2008 at 2:13 pm #1465475
I currently use a floating Reflectix lid. It is efficient, but the edge is a food trap and it sometimes takes a quirt or two of water to get it clean.
Next consider two or more sheets of thinner silicone bonded at the edges to provide air gaps and more insulation.
Verrry interesting.Dec 19, 2008 at 2:34 pm #1465479
@djohnsonLocale: Washington State
This is crazy, and I don't get it. What stops steam from escaping on the sides?
Why is this a better idea than aluminum foil on the top of the pot? Or is it just a different and interesting idea?
DougDec 19, 2008 at 2:35 pm #1465480
@dangLocale: Pacific Northwet
wax paper will work. It can be used as a substitute for a Japanese drop lid, which typically is made from cedar.
I think Yukio is adapting or using the idea of a Japanese drop lid. These are common in Japanese cooking for simmering of dishes. They are excellent in that they keep the heat in and allow cooking of delicate ingredients without having them roll around with lots of movement. Items at the top will cook better too. They also have the advantage that you don't get boil over. There is a small amount of steam that will escape out the sides but it is a small amount. Not really sure what effect it would have on boil times though.
http://en.wikipedia.org/wiki/OtoshibutaDec 19, 2008 at 2:42 pm #1465481
Informal test just performed.
Stove: Snow Peak Giga Stove – Stainless GS-100A
Wind Screen: Snow Peak Titanium Bowl (modified)
Pot: BPL Firelite SUL550 (Ti spoke bail installed)
Water: 2 cups from tap. Temp: 53°F. Room Temp: 65°
Timing: Casio quartz stopwatch.
Test No.1: Above rig with aluminum foil disk lying on top of water (no pot lid). Boil time 0:5:37.
Test No.2: Above rig without aluminum foil disk (no pot lid). Boil time 0:06:05.
Test No.3: Above rig without aluminum foil disk (using pot lid). Boil time: 0:05:30.
It looks like I could leave the pot lid at home and just use the aluminum foil disk. Or, as noted on this thread, a disk of polyethylene freezer bag material, which is probably more durable than the foil.
I'll probably just keep using the pot lid. I'm not as likely to lose it.
Edit: If I can locate a source of FDA 0.3mm (0.015") silicone sheet, similar to the type Yukio used, I would probably use it in conjunction with the pot lid. Why be half safe?Dec 19, 2008 at 9:12 pm #1465536
@markhurdLocale: South Texas
If you are looking for silicone sheet you might look at silicone dehydrator sheets for doing fruit leathers.
I found some on eBay that look like they might work and the price is reasonable. I'm not sure if they are pure silicone or a laminate but they say they are good up to 500 F. and presumably food grade.
Just a thought.
-MarkDec 19, 2008 at 9:51 pm #1465542
I found a quite thin sheet of teflon (superlight cutting board) that might work.Dec 20, 2008 at 10:21 am #1465573
"What stops steam from escaping on the sides?"
Steam is created thru "agressive evaporation" from the exposed surface area of water. With a silicone layer laying flat on the surface of the water, the only surface area exposed is between the edge of the silicon and the side of the pot. With less exposed surface area, the volume of steam generated is less, resulting in less evaporative loss of heat overall. If the silicone layer was elevated above the surface of the water (ie: like a normal pot lid) then steam would occur across the entire surface area of the water.
Think of it this way. If you pour 8 ounces of water onto a 9"x12" baking sheet, and you fill a tall narrow glass with another 8 ounces of water, and you set them both uncovered on your kitchen counter – which will evaporate first? The water in the baking sheet will evaporate much faster, as there is a larger surface area for the water to evaporate. Same principle as boiling the water, the evaporation process just isn't as agressive.
Of course, you have to use water in the above test though. If you do the test with beer, the odds are the beer in the glass will be gone before the beer in the baking sheet. Environmentally conscious all the time, we can't just sit there and let that beer evaporate, can we?Dec 23, 2008 at 3:26 pm #1466163
I just got back from Wally World with a piece of silicone –
'Dual Purpose Silicone Baking Mats' – two 9"x13" sheets, about 1 mm thick.
A 4" diameter circle weighs 0.440 ounces versus the 0.090 ounces of my Reflectix floating lid.
So the search continues for that 1/4 mm sheet….Jan 2, 2009 at 8:08 am #1467561
When you change from water to steam to a very large amount of heat is needed.
In a typical roof, to prevent water vapor will be
Most are not good.
Water vapor has already done as much as possible is the only seal feature
Steam continues to occur freely.
A lot of fuel, water vapor had been consumed.
気GA付KI difficult, but the truth.
For the backpacker, is a very sad reality
To changes in water vapor, a significant interference.
As a result, large amounts of waste can be done without the use of heat.
1. Heavy load to be reduced
2. boil quickly
3. The weight of the lid, can be very lightly
Material that is not the best silicon.
Heat-resistant, lightweight, and is looking for.
Can easily float in water are preferred
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