Odds and ends

Moderator: Mike Everman

Post Reply
Mark
Posts: 10811
Joined: Sat Oct 11, 2003 10:14 pm

Re: Odds and ends

Post by Mark » Tue Feb 11, 2020 8:08 pm

I ordered one of these that change color for a jam jar jet effect, which looks like a cherry blossom coming to life. Maybe I'll make the methanol burn green with boric acid to contrast the pink or lithium chloride for a brighter red. Wonder if the higher heat will bring out any more color or not?
www.aliexpress.com/item/32953495117.html

Also this demo shows other glass color changes with heat which would be fun added effect for a jam jar jet.
www.youtube.com/watch?v=GMZpHCRdpJ8

Funny, I just saw a commercial for Transitions lenses that change color stepping outside. But a blurb at the bottom of the commercial in fine print said the photochromic effect is dependent on temperature, UV, and lens material. I always thought it was just UV that did it.

Maybe you could have a pair of those sunglasses near a jam jar jet enough so that they would transition when the jam jar was lit. At any rate being a plastic coating or laminate in glass, most photochromic materials won't stand up to direct heat for long.
https://en.wikipedia.org/wiki/Photochromism

On photosensitive glass ...
Military applications Edit
One of the reasons for the delay between the invention of photosensitive glass and its public announcement approximately ten years later was its potential use in military applications.[8] It is possible to burn images and words that are hidden in photosensitive glass until heated at a high temperature.[2] The military used this fact during World War II to send secret messages to allied troops in pieces of what looked like "ordinary glass".[2] At the other end, the person who received the "ordinary glass" just had to heat it up to read the hidden message.[2] Because of this application photosensitive glass was kept secret until the end of World War II.[2][9]

Building applications
The United Nations Building was faced with hundreds of square feet of photosensitive glass [12] until its 2007 refurbishment when it was replaced with conventional glass with a printed pattern [13]
https://en.wikipedia.org/wiki/Photosensitive_glass
Presentation is Everything

Mark
Posts: 10811
Joined: Sat Oct 11, 2003 10:14 pm

Re: Odds and ends

Post by Mark » Sat Jul 25, 2020 4:25 pm

So these rechargeable flameless arc lighters are kind of unique for lighting jam jar jets. The first ones made an awful high pitched hum but now they are all but silent. If you don't like flicking flint or clicking piezos which eventually takes a few tries when the lighter is old or the bother of buying butane this is for you. And flint lighters make a wisp of smoke while these make a hint of ozone. Only the pencil shaped ones will light a jam jar easily due to the angle and short arc prong motif. The typical lighter shaped one I have requires the lightest of touches of a button to turn on a double arc effect. And you can buy triple arc designs too. There are a multitude of choices on eBay.
https://www.amazon.com/REIDEA-Windproof ... B07RBPQYDT

This clip was novel for the way she ignites her jam jar jets of glass and aluminum Coke cans using one of those relighting candles illustrated more so around the 7.5 minute mark and beyond.
https://youtube.com/watch?v=PPcApOUrfv8
Presentation is Everything

Mark
Posts: 10811
Joined: Sat Oct 11, 2003 10:14 pm

Re: Odds and ends

Post by Mark » Wed Sep 30, 2020 9:21 pm

I ordered this used ebay cylindrical volumetric flask thinking it might be a piece of laboratory glassware that would be ideal for demonstrating the jam jar jet effect, with the enhanced effect of a snorkel increasing thrust and sound all without modification hopefully. It's curious to wonder if it occurred to anyone to try to repurposed this shape as a jam jar jet with snorkel. There are a couple of volumetric flask whoosh bottle effects on youtube but the more common volumetric flask proportions unsuitable for a sustained reaction.
There are also these square liter sized flasks that approximate a working shape although rather expensive new as well for such frivolity.
https://www.gogenlab.com/lab-supplies/f ... imax-class

My latest interest that should arrive in a few days from California.
https://i.ebayimg.com/images/g/QqkAAOSw ... -l1600.jpg
https://i.ebayimg.com/images/g/GLsAAOSw ... -l1600.jpg
Sources
https://qla-llc.com/products/1000ml-vol ... ted-to-37c
https://kinesis-usa.com/dissolution-100 ... lk-1k.html
Presentation is Everything

Mark
Posts: 10811
Joined: Sat Oct 11, 2003 10:14 pm

Re: Odds and ends

Post by Mark » Fri Oct 02, 2020 2:46 pm

I noticed this 2 liter size is listed for $210.00 and probably shipping costs. Being curious I decided to try that shape having found 4 of them (same Kimble 28040 flask) for sale for $34.00 each or best offer on eBay, new old stock so I bought one along with free shipping. The square flask is 5 X 5 X 18 inches, a relatively sizable jam jar jet snorkeler if it works.

https://www.gogenlab.com/lab-supplies/f ... imax-class
Presentation is Everything

Post Reply