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General Category => Equipment and Software => Topic started by: timberati on January 20, 2012, 08:52:01 PM

Title: borosilicate flask and ceramic cooktops
Post by: timberati on January 20, 2012, 08:52:01 PM
Is it safe to boil my DME in the borosilicate flask on my electric stove's ceramic cooktop? I'm guessing so given the directions which say that after a 15 minute boil to place it in an ice bath to cool. sounds like pretty tough stuff.
Title: Re: borosilicate flask and ceramic cooktops
Post by: ryang on January 20, 2012, 09:34:42 PM
yes
Title: Re: borosilicate flask and ceramic cooktops
Post by: theDarkSide on January 20, 2012, 09:39:50 PM
I've been doing it for the past 3-4 years with no problems.
Title: Re: borosilicate flask and ceramic cooktops
Post by: ckpash88 on January 20, 2012, 09:58:48 PM
I have a normal electric range with the coil heating elements not a glass top can I boil in the glass on top of my stove.
Title: Re: borosilicate flask and ceramic cooktops
Post by: ckpash88 on January 21, 2012, 05:43:11 AM
Would I have to use a heat diffuser? B I have heard if you put the flask on a traditional electric stove top u can crak them
Title: Re: borosilicate flask and ceramic cooktops
Post by: positiverpr on January 21, 2012, 04:11:59 PM
you can crack them - twice if your me. ;)
Title: Re: borosilicate flask and ceramic cooktops
Post by: denny on January 21, 2012, 04:38:15 PM
you can crack them - twice if your me. ;)

Only once for me, but that mess was enough to convince me to boil in a pot, then xfer to a flask.
Title: Re: borosilicate flask and ceramic cooktops
Post by: timberati on January 23, 2012, 02:08:52 PM
Thanks, all.
Title: Re: borosilicate flask and ceramic cooktops
Post by: dcbc on January 24, 2012, 05:15:29 PM
Just reading this thread, the answers seem to vary.  Is it safe to say that:

Flask of boiling wort on traditional coiled electric element = bad.

Flask of boiling wort on a ceramic cook top with electric element underneath = no problem.
Title: Re: borosilicate flask and ceramic cooktops
Post by: paul on January 24, 2012, 08:45:53 PM
I have a ceramic cooktop and wouldn't exactly say "no problem."  Make sure you have a nucleation point for the boiling to occur, such as a stir bar or some sort of stir rod touching the bottom.

Without a nucleation site, superheated liquid can build up at the bottom, setting up a rather unstable situation.  A slight bump can cause all of the superheated liquid to vaporize in an instant, causing a hot-wort volcano. 

How do I know this?  Well, you may be able to guess.  :-\
Title: Re: borosilicate flask and ceramic cooktops
Post by: tubercle on January 24, 2012, 11:26:28 PM
Use that little wheel thingy on your mouse and scroll up to re-read Denny's post.

And I quote:"...but that mess was enough to convince me..."
 

 
Title: Re: borosilicate flask and ceramic cooktops
Post by: dcbc on January 25, 2012, 03:28:12 PM
Use that little wheel thingy on your mouse and scroll up to re-read Denny's post.

And I quote:"...but that mess was enough to convince me..."
 

 

Right, but the topic had already shifted to traditional coils at that point.  So I didn't know if Denny had tried it on ceramic or not. 

I'll probably stick to boiling in a pot and transferring, but wanted to be sure.

If I do try it, I'll leave the stir bar in there as a nucleation site.
Title: Re: borosilicate flask and ceramic cooktops
Post by: denny on January 25, 2012, 04:33:53 PM
Use that little wheel thingy on your mouse and scroll up to re-read Denny's post.

And I quote:"...but that mess was enough to convince me..."
 

 

Right, but the topic had already shifted to traditional coils at that point.  So I didn't know if Denny had tried it on ceramic or not. 

I'll probably stick to boiling in a pot and transferring, but wanted to be sure.

If I do try it, I'll leave the stir bar in there as a nucleation site.

Yep...flat top ceramic.  Took me hours to scrape off the burned on sugar.
Title: Re: borosilicate flask and ceramic cooktops
Post by: dcbc on January 25, 2012, 10:17:09 PM
Yet another thing Barkeepers friend is great for cleaning - ceramic cook tops.
Title: Re: borosilicate flask and ceramic cooktops
Post by: hopfenundmalz on January 26, 2012, 04:01:26 AM
A friend has the lab stand, the clamp to hold the neck of the flask, and a bunsen burner.

That is the what they are designed for, no?