Pressure Pot Suggestion Please - Page 3 - International Association of Penturners
     International Association of Penturners
Pens for Service Members
Support The IAP

Go Back   International Association of Penturners > Community Forums > Blank Making > Casting & Stabilization
  Forgot Password
Register FAQ Members List Search Today's Posts Mark Forums Read
Casting & Stabilization Making your own blanks & stabilizing wood blanks.

Logged on members can hide ads!

Welcome to!

You've found the home of The International Association of Penturners. You are currently viewing our site as a guest, which gives you limited access to view discussions, photos, and library articles.

Consider joining our community today. You'll have full access to all of our content, be able to enter our contests, find local chapters near you, and post your questions and share your experience with our members all over the world.

Membership is completely free!!

If you have any problems with the registration process or your account login, please contact us.

LinkBack Thread Tools Display Modes
Old 11-02-2017, 12:46 PM   #21 (permalink)
Join Date: Nov 2010
Location: Saskatoon SK., Canada.
Posts: 2,877
Photos: 1


More than big enough.

I got my pot from a dumpster at a paint manufacturer in the late 80's I was doing work for. It had no name plate on it but would have been North American made.
Proud to be the support staff and enabler of Marla Christensen.
Likes: (1)
Curly is offline   Reply With Quote Top
Old 11-02-2017, 01:02 PM   #22 (permalink)
magpens's Avatar
Join Date: Feb 2011
Location: Coquitlam, BC, Canada
Photos: 67


I remember those pressure (paint) pots being quite common 60+ years ago. Every commercial and domestic home painter used one.

A lot of them would have been dumpstered ... haven't seen any in use for many years and I guess that's because commercial painting technology has changed a lot.

Kids rule the world !!! .... eventually if not already !

magpens is offline   Reply With Quote Top
Old 11-02-2017, 01:39 PM   #23 (permalink)
Join Date: Apr 2017
Location: Gilberts, Illinois
Posts: 26
Photos: 0

Default vacuum chamber recomendation

I have used this about 4 times now with cactus juice and it has worked flawlessly. I did have some shipping damage, but lab 1st handled it immediately and at no cost to me to make it right.

Cheapest kit I could find with an actual vacuum pump and I can reliably reach -29.5" Hg with no issue. With the 3CFM pump this can be done in about 5-10 minutes depending on what shape the worthless wood is in.

The out gassing of the material takes MUCH longer ~ 1-2 hours for it to stop bubbling.

I follow this up with 2-3 hours in a toaster oven at ~225 to cure the cactus juice. After trimming/breaking stabilized wood to desired sizes I put into molds and preheat to about 200F. Mix alumilite at ambient with multiple colors and pour into preheated mold. Put in pressure pot at 50psig for about 1-2 hours depending on which alumilite I use. The preheating is huge for a proper cure and no bubbles (at least for me anyway).

Just wanted to share my two cents.

See the two pictures attached as examples of my first and second try.
No bubbles or voids realized when turning.
Attached Thumbnails
20171022_130115.jpg   20171022_193647.jpg   20171022_193653.jpg   20171025_100901.jpg   20171025_100848.jpg  

Likes: (1)
giardinm is offline   Reply With Quote Top
Old 11-02-2017, 01:44 PM   #24 (permalink)
Join Date: Jul 2013
Location: Owensboro, KY
Posts: 290
Photos: 0



Depending upon what you are planning to do, you can probably get by without a pressure pot for a while and maybe forever. Assuming that you decide to go with urethane resin Alumilite has quite a few videos on its website that are helpful with respect to taming the dreaded bubble.

I have also found this reference to be quite helpful. While it is geared more toward the robotics hobbyist and is at least a couple of years old it is a very good primer on silicone mold making and casting resins along with how they can be modified.

Guerrilla guide to CNC machining, mold making, and resin casting

Likes: (1)
bmachin is offline   Reply With Quote Top
Old 11-02-2017, 02:56 PM   #25 (permalink)
magpens's Avatar
Join Date: Feb 2011
Location: Coquitlam, BC, Canada
Photos: 67


Thank you, Nick.

Thank you, Bill.

Kids rule the world !!! .... eventually if not already !

magpens is offline   Reply With Quote Top
Old 11-03-2017, 10:36 AM   #26 (permalink)
Mike Powell's Avatar
Join Date: Jul 2013
Location: League City, Tx 77573
Posts: 550
Photos: 0


Originally Posted by magpens View Post
It seems that more and more of our members are learning to cast blanks.

At some point I would like to join in that activity.

I have not looked around seriously for a pressure pot, just asking for suggestions as to what other people use.

One or two of the hardware/tool stores that I frequent sell "paint pots" with a gauge on top, a lid seal, and sturdy clamps. . Is this a pressure pot ?

Another question I have relates to the use of pressure for casting as opposed to vacuum.

My intuition seems to be telling me that vacuum is what you need for casting as opposed to pressure. . Isn't vacuum the way to get bubbles out ?

I do understand the difference between pressure and vacuum and worked with both for many years in my career as an experimental physicist.

In spite of that, as I consider doing my own casting I would intuitively go for vacuum.

Happy to hear what others think.
I use the harbor freight paint pot, with little rework it works great.

Sent from my SAMSUNG-SM-G930A using Tapatalk
Mike Powell
Rookie Turner
Likes: (2)
Mike Powell is offline   Reply With Quote Top
Related Content
Logged on members can hide ads


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 05:24 AM.

Powered by vBulletin® Version 3.7.6
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0

Content Copyright © 2003-2018 by, LLC; All Rights Reserved
Terms Of Service   Acceptable Use Policy