Sodium Silicate Cores

[doubleboost]

Hi
Lads
Sorry
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[krv3000]

ooooo well dun

[vtsteam]

Interesting way to make cores. Where did you get the sodium Silicate?

Could you just enclose the cores in a plastic bag with an open jar of seltzer water to cure them?

Or maybe some bicarbonate of soda in water and add a little vinegar?

[dsquire]

Hi
Lads
Sorry
More video

John

No need to appologize for making more video. We love them and enjoy watching and learning from each and every one of them. I'm glad to see that you have got it figured out how to embed the link now as well. 

Thanks for taking the time required to make and edit the video's. It seems so easy when you are watching but I realise it is a different story on the other side of the camera. 

Cheers 

Don

[sparky961]

"Per'aps that was a bit overenthusiastic" -- Classic!  Made me laugh out loud.  I'm glad you didn't edit this out because we've all been there.   Thanks for the entertaining and informative videos.

[andyf]

Another fascinating video.

I remember sodium silicate or "waterglass" from my childhood when it was used for preserving eggs and making "chemical gardens", but had no idea that it reacted with carbon dioxide in this way. For anyone else who is interested, I found a (not too technical) description here: http://www8.svsu.edu/~rtuttle/FRG/HOWTOs/Sodium%20Silicate%20Coremaking.pdf

Andy

[awemawson]

If I remember correctly John, I was using 4% sodium silicate by weight - not done it in the last 6 years as my foundry stuff is still not unpacked, but I do have two drums each of 25 litres of the stuff!

[Rob.Wilson]

  will you be demonstrating that quick core removal method this afternoon John 

Cracking vid mate 


I see my pattern has changed a tad Bob   

Rob 

[Brass_Machine]

"Per'aps that was a bit overenthusiastic" -- Classic!  Made me laugh out loud.  I'm glad you didn't edit this out because we've all been there.   Thanks for the entertaining and informative videos.

I agree! Learning quite a bit watching these...