Sciencemadness Discussion Board

24/40 Glassware. What A Deal

Mirage - 15-2-2012 at 20:46

Just found this on eBay. What a deal! Oh wish i hadn't bought that 14/20 stuff from C Tech Glass!

Purpose of this post: Get this deal out in the community.

http://www.ebay.ca/itm/Kimble-Chemistry-Organic-Glass-Lab-Se...

Mirage

Magic Muzzlet - 15-2-2012 at 20:49

You don't even know what the final price will be, it's an auction...

Mirage - 15-2-2012 at 21:03

Yes, of course, however judging by the fact the end of auction is only 3 days away, and the fact that it is only at 45$ right now...

here is a look at some other auctions going on right now...just to give a comparison.

http://www.ebay.ca/itm/New-24-40-Premium-Organic-Chemistry-L...

http://www.ebay.ca/itm/New-24-40-Chemistry-Distillation-Kit-...

http://www.ebay.ca/itm/New-24-40-Complete-Chemistry-Distilla...
Quote: Originally posted by Magic Muzzlet  
You don't even know what the final price will be, it's an auction...


This is a good point however. Just wanted to put this out there.

Mirage

Halcyon - 15-2-2012 at 21:13

Dude, early-day auction prices mean absolutely nothing. Most people will use a sniping program to automatically bid their highest at the last minute. Chances of scoring a bargain like that are minimal.

Also, getting it out into the community would be the *last* thing to do if you wanted to score a bargain. You know, given that they're auctions and all.

Mirage - 15-2-2012 at 21:24

Guess so. Guys! Forget about this!:D sorry. Shouldn't have posted then.

Mirage
Quote: Originally posted by Halcyon  
Dude, early-day auction prices mean absolutely nothing. Most people will use a sniping program to automatically bid their highest at the last minute. Chances of scoring a bargain like that are minimal.

Also, getting it out into the community would be the *last* thing to do if you wanted to score a bargain. You know, given that they're auctions and all.


[Edited on 16-2-2012 by Mirage]

Halcyon - 15-2-2012 at 22:04

Quick, delete the thread and set Max-Bid to stun! :P

grndpndr - 15-2-2012 at 22:09


Yur not the lone ranger.Ive been stung by early optimism
myself.

Hexavalent - 16-2-2012 at 00:33

This will be in Detritus before long.

Funkerman23 - 16-2-2012 at 06:01

ehhhh given that I already own all those pieces in my joint size I think I'll let it pass.

Ephoton - 16-2-2012 at 06:40

I think 14/20 gear is heaps better than 24/40

a basic 24/40 for making up reagents and then the real funky stuff in 14/20 makes for
a safer lab I think.

keeps reaction sizes down and gives you the balls to try shit you would not in larger glass.

oh and ive had some of the kimble shit and shit is exactly what it
is.

second only to sam duck :) as far as shit goes.


[Edited on 16-2-2012 by Ephoton]

AirCowPeaCock - 16-2-2012 at 07:31

Quote: Originally posted by Ephoton  
I think 14/20 gear is heaps better than 24/40

a basic 24/40 for making up reagents and then the real funky stuff in 14/20 makes for
a safer lab I think.

keeps reaction sizes down and gives you the balls to try shit you would not in larger glass.

oh and ive had some of the kimble shit and shit is exactly what it
is.

second only to sam duck :) as far as shit goes.


[Edited on 16-2-2012 by Ephoton]


and <u>shit</u> goes far.

Halcyon - 16-2-2012 at 12:44

You don't recall certain... issues, with 14/20? :P

Methinks one of these is essential. Makes life a lot easier if you're not dealing with something particularly temperature-sensitive, at any rate.
Quote: Originally posted by Ephoton  
I think 14/20 gear is heaps better than 24/40

a basic 24/40 for making up reagents and then the real funky stuff in 14/20 makes for
a safer lab I think.

keeps reaction sizes down and gives you the balls to try shit you would not in larger glass.

oh and ive had some of the kimble shit and shit is exactly what it
is.

second only to sam duck :) as far as shit goes.


[Edited on 16-2-2012 by Ephoton]


[Edited on 16-2-2012 by Halcyon]

Mirage - 16-2-2012 at 13:02

Personally, I have never had issues with 14/20 glassware.

What issues would they be?
Quote: Originally posted by Halcyon  
You don't recall certain... issues, with 14/20? :P

Methinks one of these is essential. Makes life a lot easier if you're not dealing with something particularly temperature-sensitive, at any rate.




Quote: Originally posted by Ephoton  
I think 14/20 gear is heaps better than 24/40

a basic 24/40 for making up reagents and then the real funky stuff in 14/20 makes for
a safer lab I think.

keeps reaction sizes down and gives you the balls to try shit you would not in larger glass.

oh and ive had some of the kimble shit and shit is exactly what it
is.

second only to sam duck :) as far as shit goes.


[Edited on 16-2-2012 by Ephoton]


[Edited on 16-2-2012 by Halcyon]

Halcyon - 16-2-2012 at 16:10

The relative ease with which a distillation can run away on you and start pumping liquid up your condensor and into your distillate.

Nothing that can't be avoided with patience and attentiveness.

[Edited on 17-2-2012 by Halcyon]

Lambda-Eyde - 16-2-2012 at 16:28

Quote: Originally posted by Mirage  
J
http://www.ebay.ca/itm/Kimble-Chemistry-Organic-Glass-Lab-Se...

Mirage

That set (though with a one-necked RBF instead of three-necked) was my first set of ground glass. I remember buying it on eBay for about 150 USD like three years ago. Boy, I was happy :D
Quote: Originally posted by Halcyon  
The relative ease with which a distillation can run away on you and start pumping liquid up your condensor and into your distillate.

Nothing that can't be avoided with patience and attentiveness.

[Edited on 17-2-2012 by Halcyon]

Then you're obviously doing something wrong - what size of flask did you use? How much did you fill it?

[Edited on 17-2-2012 by Lambda-Eyde]

entropy51 - 16-2-2012 at 17:50

Quote: Originally posted by Ephoton  
oh and ive had some of the kimble shit and shit is exactly what it
is.
I don't know what you actually bought, but i have a Kimble 24/40 set that I bought from Fisher in 1985.

I have bounced the RBF's off the tile floor in the basement, heated them under high vacuum, soaked them in KOH-ethanol and dichromate cleaning solution, you name it.

I still have every piece of glassware that came in that set. No scratches, cracks or other problems.

Maybe what they sell nowadays is not as good as in 1985, but back then it was quality glass.

Mirage - 16-2-2012 at 18:47

Yes, I've got one of them. It's great! I use it all the time.

From what I've heard as well, Kimble glass is in the higher range group.

Mirage
Quote: Originally posted by Halcyon  
The relative ease with which a distillation can run away on you and start pumping liquid up your condensor and into your distillate.

Nothing that can't be avoided with patience and attentiveness.

[Edited on 17-2-2012 by Halcyon]

Halcyon - 16-2-2012 at 22:21

Quote: Originally posted by Lambda-Eyde  

Then you're obviously doing something wrong - what size of flask did you use? How much did you fill it?

[Edited on 17-2-2012 by Lambda-Eyde]


Thought I replied to this... weird.

500ml round flask, filled ~350ml, so yes, that's a lot of it. Actually, what *is* the recommended max level in a flask for distillation?

Lambda-Eyde - 16-2-2012 at 22:59

Quote: Originally posted by entropy51  

Maybe what they sell nowadays is not as good as in 1985, but back then it was quality glass.

"Damn kids nowadays with their Bomex and Crappex! Back in the days, I tell ya, Kimax was the best glass money could buy!" :D
Quote: Originally posted by Halcyon  

Thought I replied to this... weird.

500ml round flask, filled ~350ml, so yes, that's a lot of it. Actually, what *is* the recommended max level in a flask for distillation?

Half full is what most people say. For some distillations (where bumping/foaming/flooding won't be a problem), like when distilling dilute ethanol, I fill it maximum 2/3 up and take it slowly from there. A 500 mL flask with 14/20 fittings and condenser isn't good... There's a reason it's hard to find flasks over 250 mL with 14/20 joints, you know!

[Edited on 17-2-2012 by Lambda-Eyde]

entropy51 - 17-2-2012 at 11:51

Quote: Originally posted by Lambda-Eyde  
"Damn kids nowadays with their Bomex and Crappex! Back in the days, I tell ya, Kimax was the best glass money could buy!" :D
No, Pyrex was the best. But Fisher only sold Kimax kits at the time.

Actually I have a couple of Bomex beakers and condensers that so far have been OK.

Dr.Bob - 17-2-2012 at 19:13

Pyrex, Ace, Atmar, Kontes, and LabGlass are all good. Now I have been very impressed with ChemGlass, they have very good quality round bottom flasks, as well as many other items. They are the heaviest wall flask around, good for vacuum work. You do need to heat them carefully, they are best for mantles due to their thickness. But they resist getting star cracks better than any other brand in my hands (and floors).

I've only worked with a few cheaper glassware items, and would not worry about using them for beakers and erlenmeyers, but I would avoid them for glass joint flasks. I have some economy beakers in my collection, and they look just fine for most work. My biggest problem with glassware has been addition funnels, them seem to break easily, have poor stopcocks, and be poorly designed. The seem to break easier than anything else.