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Open-Faced Kilncasting

For discussion and commentary regarding the Lesson and Project videos of the Bullseye Kiln-Glass Education Online program.

Re: Open-Faced Kilncasting

Postby monique.vanderloo » Thu May 15, 2014 5:56 am

I've done this before and really like it, although it can be quite messy.
One thing I did miss however, although I'm not sure if this is necesseray in the US. What do you do with the plaster/mold ?
We -in the Netherlands- have been told that this is not to be thrown in your every day garbage.

Regards
Monique
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Re: Open-Faced Kilncasting

Postby marykaynitchie » Thu May 15, 2014 9:31 am

In the US, we generally put leftover plaster in a trash bag, and we are allowed to put that in the trash.

Mary Kay
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Re: Open-Faced Kilncasting

Postby charlie » Thu May 15, 2014 8:30 pm

it's mostly calcium. break it up into small pea sized pieces and dump it on your gravel driveway. it might be good in a garden, as eggshells are mostly calcium and good for plants too, especially if the soil is too acid the calcium will neutralize that.
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Re: Open-Faced Kilncasting

Postby cyndepeace » Tue May 12, 2015 10:27 am

Ok, I know as soon as I ask this, the answer is going to be painfully obvious, I've watched the video a couple of times, and in the Supplies sheet, it lists Hydrogel. Where does that come in to the mix???

(preparing to feel stupid) :oops:
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Re: Open-Faced Kilncasting

Postby marykaynitchie » Tue May 12, 2015 2:55 pm

Oh, it's NOT obvious from the video. In fact, we should probably take it off the materials list.

The Hydrogel N is used for making multiple forms in plaster. The use of Hydrogel N is demonstrated in the video "Box Casting" https://videos.bullseyeglass.com/videos/box-casting/

We don't demonstrate the use of it in this open-faced casting video, which is geared toward creating a single, one-off piece.

Mary Kay
Mary Kay Nitchie
Bullseye Glass Co.

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Re: Open-Faced - box casting

Postby oglassart » Mon Jul 20, 2015 1:27 am

Hi
I watched the two video lesson : open molds , casting box .
It is not clear to me why their is a different firing process . Casting box is not exmpel for open mold?
Especially the different ramp to the target temperature .
Is it possible to get an explanation of what causes for that?
why Slow ramp of 150f (83 c) to work temp. In box casting process
But ramp of 600f to the full fuse temp.?
All the best
Osnat
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Re: Open-Faced Kilncasting

Postby mcfarlandglass » Thu Sep 20, 2018 9:45 am

Hi!
Was the investment mold in the video's example air dried before firing or does this firing schedule make it possible to go from just cured (but still wet) to the kiln? If it was air dried first, about how long would a mold like this take to air dry?
Thanks!
Angela McFarland
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