Scientific Glass Blowing Ep:4 How to make an ampoule from scratch or from test tube

[@shawncalderon4950]

The added visuals are brilliant! You are an excellent teacher!

[@joannecarson5568]

This is great, but you should continue the video on to show you adding the liquid, then sealing the ampule. Then as a finale, opening the sealed ampule.

[@MatheusVonDashuches]

is the following tek used to cut properly glass ? By using a thermal shock, I remember cutting a glass bottle by putting a fine band of fabric( old cloth, old t-shirt, or sheets) imbibed by alcohol and then igniting it so the bottle was heated just at the place where the band of tissue was rolled around the bottle and then Immerse the bottle in a cold water container and the hot Vs cold reaction produced a thermal shock that cut it relatively clean I used that to make some DIY lamps with a nice looking bottle like with a Bombay gin bottle.

[@kriskquinn.68]

I have juat received liquid medications in ampoules. Do you have any suggestions as far as opening them cleanly and easily without damaging or spilling the contents?

[@Coincidence_Theorist]

How can i seal an ampoule whilst maintaining high pressure or as high a pressure as possible within….. without it popping ??

[@redmuscle99]

I would do it under a pressurized environment like a glove box if possible... otherwise, add the substance at cryogenic temperature, and seal the ampoule, and once it reaches ambient temperature it will necessarily be at very high pressure (Gay-Lussac's Law).

[@mitchclover258]

Where can I find the glass tubes you used for the video?

[@GlassLandsART]

In Czech republic named kavalier glass and you know how it do im from czech❤❤❤

[@ethereal41]

how would we get domes on both ends?

[@nemonobody3667]

Hi! I've been playing around with burning glass tubing for 1.5 months now. My first milestone was to make a sealed vial with two symmetrical domes, it's getting there. I've made test tubes from 10mm OD 1mm thickness tubes rather consistently, for the 7mm OD 1mm thick ones, those are very difficult to work because the tube is way too small compared to the flame diameter. Test tube making is related to the dome seal. Now to answer your question, seal the vial like how you would pull seal when forming a test tube. You can look at Wheeler Scientific's video on that, I've learned it from him. Before the seal, heat up the glass below slightly to expand the air inside to give some tolerance for expansion. Work the seal to as close a dome as possible, but there is a risk of the air getting too hot and popping the melted glass, this is where the expanded gas comes in useful, you can cool it off slightly to give more temperature allowance for the heated part. It is a balance of glass temperature, glass softness, air pressure, and also getting the uneven part hot enough to "flow" the glass. All three aforementioned parameters are interdependent. Small pointed flame is also very useful to precisely heat a small part. Currently I am using butane-air welding torch. It's quite challenging. Hotter torches would really help tbh.

[@ngozumpa]

Would this work with borosilicate glass tube?

[@ethereal41]

yeah i guess. other science channels use regular borosilicate lab glass which i think has a lower softening point. it should be easier.

[@dr.infinite782]

Can I use ballons with Helium to displace it with Oxygen?

[@GallantDrop1196]

Yes probably i also have an idea on doing that

[@wahshiaseel5335]

How to add liquid

[@WheelerScientific]

before seal

[@phonotical]

And if you want to open it again?

[@WheelerScientific]

Score and break like normally.