How much pressure?

[Unique]

I'm looking to start casting a variety of blanks in the next few months and been looking at the specs of pressure pots available - and of course the costs?
Some seem to be rated to around 35-40psi and others at 80+psi. This has got me to ask questions about .. just how much pressure is necessary or ideal? And, what would be a good product to follow-up on ?
Thanks

 

[Penpal]

THere are many experts on the forum now, the replies should prove interesting.

Peter.

 

[Paul hd]

Hi Tony,

I got a 80psi tank and use at 60psi. I have seen plenty of people use 40psi and have good results too.

After a bit of research and asking here at this forum I went with this model.
Resin Model Moulding Casting Tank 10Litre

It is a substantial bit of kit and I'm very happy with it.

All the best,
Paul

 

[Bucks]

I'm no expert at casting (not yet anyway) as I only started casting earlier this year & have been to busy researching & developing casting moulds & vacuum chambers) but I recon the more pressure the better (up to the max rated pressure of course) as the higher the pressure the smaller any air bubbles will compressed down to.

Both my pots are rated at 80psi which I bought from here

 

[Bucks]

2 comments from two Paul's with the same pressure pots, as the link Paul hd posted is the same company that I purchased from, but I posted a link to there ebay shop

 

[wm460]

I recon the more pressure the better (up to the max rated pressure of course)

You can have too much I will show you a pic when I find it.

 

[Bucks]

You can have too much I will show you a pic when I find it.

I'm intrigued now

 

[Penpal]

Some beaut answers in Jims two for sales.

Peter.

 

[Bammer]

but I recon the more pressure the better (up to the max rated pressure of course)

Simple answer is NO

more research required

 

[Bucks]

Simple answer is NO

more research required

Care to enlighten us a bit more then?

 

[Bammer]

After a certain point it won't make any difference

40 is enough to do what we want, some do 40, some do 50 - 60 but it won't change the result.

There are other factors of course .. type of Resin, Time, Temp ....

 

[Unique]

Thanks Paul and Paul and others for your advice. I've followed up on the link that you gave.
Apologies for the delay in responding -- I've had little/no internet over the past fortnight.
Tony