Naked Science Forum

Non Life Sciences => Chemistry => Topic started by: thedoc on 05/02/2015 07:30:02

Title: How do you reduce surface tension in melted wax?
Post by: thedoc on 05/02/2015 07:30:02

J L asked the Naked Scientists:
   
I have a question about parifin wax how do i reduce the surface tension when melted and poured need it to flow flat to edges?

What do you think?

Title: Re: How do you reduce surface tension in melted wax?
Post by: Colin2B on 05/02/2015 09:42:28

Quote from: thedoc on 05/02/2015 07:30:02

J L asked the Naked Scientists:
   
I have a question about parifin wax how do i reduce the surface tension when melted and poured need it to flow flat to edges?

What do you think?

Most candle moulds work with the top of the candle at the bottom when pouring to avoid this. The other problem you get is that the wax contracts as it cools leaving a well in the centre.
You might try silicone moulds or use a silicone release agent.