The subtitles marked English are in Japanese. It's fine, of course, if there are no English subtitles, we aren't entitled to an English translation. Could you please correct the labels.

sorry, but i checked, and the subtitles are activated in english in youtube, but still not appearing. it's a real shame because your videos are very interesting. HI

You forgot to link us to the JB Weld. ;)

Can you tell me what is it called ? and Do you think Ebay has that part?

Es una persona muda ,porque siendo necesario una explicación ,no la da ,!!!

That's more than a partial vacuum. 70 cm/Hg = 700 torr ~ 1 atm so pretty much a totally vacuum

@@HyperactiveNeuron somewhat ironically I specified partial vacuum because I anytime you only say "vacuum" people come after you going well actually. Taking about perfect vacuums despite them never being mentioned. A partial vacuum doesn't have a defined valued, a physicist would likely consider anything that isn't a perfect vacuum a partial vacuum. No such thing as pretty much a total vacuum, that's the difference between getting the desired result, nothing happening or your turbomolecular pump blowing up.

True. 27" and narry a leak? This little unit seems to deliver.

​@@oliverer3I read somewhere that 30" is basically the practical max at sea level. That said, the 27 he showed in this vid seems to be pretty good for such a cheap and easy DIY for small projects {shrugs}

Big brother is listening.🙂

Yes！

Would be interesting to put it in the freezer with the expanded marshmallow. Would it hold its size while frozen? Might have to try this...

​@@John2009Rbut it probably take very long time. There isn't much air to conduct heat

I made something similar to degas silicone/resin back when I used to build scale models. I used a handheld vacuum pump used to bleed vehicle brakes. Mytivac is the name brand, but there are a lot of cheaper knockoff brands that work just as well (certainly not as cheap as a syringe, though).

тут бы про применение в технике рассказать. Например- можно вакуум использовать для пропитки пористых материалов лаком. Или использовать для откачивания пузырьков воздуха из эпоксидки итд.

@@andreyn1719 для дегазации эпоксидки и проч. это, конечно, тоже подойдёт, но для очень небольших деталей. Да и вакуум нужного разрежения особо пластиковым шприцом не сделать. Всё-таки если серьёзно литьём заниматься, наверно, нужно и чуть более серьёзное решение. А вот бытовое применение, показанное в ролике, как раз очень практичное, особенно для кофе. Кофе в открытой пачке окисляется за неделю-полторы, теряя вкус и аромат. Про пропитку пористых материалов -- интересная идея. Но ведь их будет распирать? Если несложно, поясните суть технологии.

I'd enjoy it in a how to make crystal clear ice video. I got some ice cube molds and never found a convenient way to degas water for those beautiful crystal clear cubes or mini "Death Star" ice...

Just a thought, but pressure makes the bubbles smaller while a vacuum actually removes them.

the issue with vacuum seals created during canning when it comes to applications like resin is that it introduces moisture which is VERY bad for reain

Japanese! :)

@@mikebarrett2621 yeah, definitely not Chinese rubbish we get everywhere else

@@Sparky_D FYI the valve is made in China/Taiwan. Check it out instead of exposing your ignorance.

@@vc20029 Well you can't speak, Taiwan is not the same as China

@@Sparky_D So only you can speak. Did I say Taiwan is the same as China. Why don't you check the link for the "non return Valve" shown in the description. Maybe it would help you.

Этот клапан похоже не из медицины, а для аквариумов.

@@user-lk1zz6sc1n Спасибо! Надо будет глянуть.

"Would it be cheaper/more efficient..." No, your idea wouldn't work. He's using one-way check valves. The triangles on the check valves show which way the air can flow; air can't flow in the opposite direction (rewatch the video, the direction of the triangles is important to make this work). Air can only be drawn out of the glass jar on the syringe upstroke, and air can only be discharged to atmosphere on the syringe down stroke. The repeated up and down strokes of the syringe evacuates the air from the jar and ejects it to atmosphere, creating a vacuum in the jar.

@@ianshand6094 You've misunderstood I think. Still use both one way check valves (One drawing out of the jar, the other ejecting air out of the syringe.) But instead of leaving the jar check valve on the jar (and every jar) you leave it on the syringe. It just gets plugged into the stub of tubed epoxied into the lid. Hook up the check valve/syringe unit to the jar tube stub. Draw the vacuum. Pinch the jar tube stub closed. Disconnect check valve/syringe unit. Plug jar tube to retain vacuum. See? Instead of leaving check valves on the jars, acting as 'plugs' in the lid hole, you're just using a plug in the jar tube so the same check valve can be used each time. (Not that these check valves are particularly expensive. But a tube and plug/bung is cheaper and likely easier to store than a comparatively large plastic cylinder protruding out the top.)

​​@@wingnutbert9685"You've misunderstood I think..." Ahhhh, I see. Yes, I had misunderstood you, sorry.

@@ianshand6094No worries. Glad I could clarify.🙂👍

I was wondering that myself. I wouldn't go tapping or hitting the glass jar. But then that's not a terribly good idea at any time😊

Aquarium supply

If a pet shop sells aquariums/fish it's often called a check valve

It’s just a lot more expensive

@@drone9 if 3 caps with the pump cost 10€ it's too much ... epox in contact with food I don't like it much

​@@filipporossifavilli68mayba can try silicone sealant?

幼稚園の息子にマシュマロを大きくしてあげると言って見せたのですが、いざ食べようとしたら。。。。 しばらく「パパ嘘ついた」と言われました。いや、嘘はついていないんだけど。。。