Purple heart in the oven - International Association of Penturners
     International Association of Penturners
Pens for Service Members
 
Support The IAP

Go Back   International Association of Penturners > Community Forums > Finishing
  Forgot Password
Register FAQ Members List Search Today's Posts Mark Forums Read
Finishing It ain't a pen till it's FINISHED!


Logged on members can hide ads!

Welcome to penturners.org!

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.

Reply
 
LinkBack Thread Tools Display Modes
Old 02-25-2008, 01:53 AM   #1 (permalink)
 
Join Date: Feb 2008
Location: San Diego, CA, USA.
Posts: 179
Photos: 0

Default Purple heart in the oven

I always seems to post questions... So I wanted to post a trick instead this time :) When turning purpleheart, try to make it change color in your oven. I just placed segments of a gelwriter in mine and it was very interesting. The color had a blue / red gradient within the blank and was overall much more intense and violet (instead of purple) than what I had been able to achieve before.

Here are my thoughts:

- 250oF, 10 minutes. Monitor the barrels all the time. The wood will turn purple, then violet, then black if grossly overdone.

- It's okay to put the mandrel with the unfinished barrels in the oven. Just loosen the end nut to allow for expansion.

- It's metal above water boiling temperature. Use protection when handling the mandrel. It will take a while to cool too.

- Use a collection pan (either made of aluminum foil or a cheap disposable one). If you overdo the blank it may leak some smelly stuff you don't want to keep in the oven.

- Rotate the blank... Or not for interesting effects... The temperature will probably not be homogeneous.

have fun!

PS: I wish I had taken a picture before giving the pen to a friend [8)]
Sfolivier is offline   Reply With Quote Top
Old 02-25-2008, 02:33 AM   #2 (permalink)
R2
 
Join Date: Sep 2007
Location: Brisbane, Queensland, Australia.
Posts: 1,998
Photos: 0

Default

You learn something every day! how long does the colour last? Does UV effect it?
__________________
R2
I\'m not addicted. I just can\'t stop turning.
R2 is offline   Reply With Quote Top
Old 02-25-2008, 02:58 AM   #3 (permalink)
 
Join Date: Feb 2008
Location: San Diego, CA, USA.
Posts: 179
Photos: 0

Default

Once the color has changed, I don't think it behaves any differently from a standard purpleheart tint. It's just a different way to convert pigments. I bet UV will affect it, although I don't know how since the shade is slightly unusual (violet instead of purple). Hopefully it won't be too much of a problem for our pens... I finished the last pen with a simple friction polish (shellac) and it's been fine for a few weeks.
Sfolivier is offline   Reply With Quote Top
Advertisement
Old 02-25-2008, 04:09 AM   #4 (permalink)
 
Join Date: Jun 2004
Location: Anchorage, Alaska, USA.
Posts: 2,267
Photos: 4

Default

Thanks. This is how we learn!
__________________
John in Anchorage
jwoodwright is offline   Reply With Quote Top
Old 02-25-2008, 05:57 AM   #5 (permalink)
Member Liaison
 
leehljp's Avatar
 
Join Date: Feb 2005
Location: Tunica, MS,
Posts: 5,407
Photos: 46

Default

Quote:
Originally posted by R2

You learn something every day! how long does the colour last? Does UV effect it?
Yes, UV does affect PH. Lots of archived posts on this subject with purple heart as well as some other woods too, including padauk. I don't remember if heat has any affect on padauk like it does PH.
__________________
Hank Lee

Experience is what you get when you don't get what you wanted!
leehljp is offline   Reply With Quote Top
Old 02-25-2008, 08:45 AM   #6 (permalink)
 
edstreet's Avatar
 
Join Date: Aug 2007
Location: No longer confused....
Photos: 2

Default

Check this out:

' An Investigation of the Factors controlling the Color Change of Purpleheart Wood'
http://www.organicsculpture.com/Purpleheart.html

An easier way to do this is to stabilize purple heart. It undergoes the same heat treatment during the process and turns out quite nice looking.





This block was stabilized by WSSI and has yet to do any form of color changes. It shows the blues quite well.

Ed
__________________
Anyone can COPY, it takes a *TRUE ARTIST* to CREATE

-- In times of universal deceit, telling the truth becomes a revolutionary act.

Design your own Polymer Clay Pen Blanks by Toni, Detailed 'CA' Article
edstreet is offline   Reply With Quote Top
Old 02-25-2008, 03:19 PM   #7 (permalink)
 
Join Date: Feb 2008
Location: San Diego, CA, USA.
Posts: 179
Photos: 0

Default

It makes sense. A lot of stabilizing polymers are thermally cured. It's just fun to do it yourself tho, and it allows from some gradient effect. The color seems right tho, my last blanks were really like the blueish area.
Sfolivier is offline   Reply With Quote Top
Old 02-25-2008, 03:42 PM   #8 (permalink)
 
Join Date: Feb 2006
Location: Brentwood, TN, USA.
Posts: 781
Photos: 0

Default

I did the oven method. Here are before and after scans (after is on the right).

Fifteen minutes at 350 degrees:


and anotehr ten minutes at 350 degrees:


__________________
Some say I\'m eccentric - I just say my tool\'s a skew.
jtate is offline   Reply With Quote Top
Old 02-25-2008, 03:46 PM   #9 (permalink)
 
edstreet's Avatar
 
Join Date: Aug 2007
Location: No longer confused....
Photos: 2

Default

You can also use feed-n-wax to bring out the color instantly before adding the ca finish :)
__________________
Anyone can COPY, it takes a *TRUE ARTIST* to CREATE

-- In times of universal deceit, telling the truth becomes a revolutionary act.

Design your own Polymer Clay Pen Blanks by Toni, Detailed 'CA' Article
Likes: (1)
edstreet is offline   Reply With Quote Top
Old 02-25-2008, 04:11 PM   #10 (permalink)
 
Join Date: Feb 2006
Location: Brentwood, TN, USA.
Posts: 781
Photos: 0

Default

Ed,

I read the whole piece to which you included a link. It seems to espouse heat-treatment but it doesn't say in what manner the heat was applied. You're seeming to espouse some different method - stabilization - which you indicate is easier but about which I have no knowledge. Can you explain how one goes about stabilizing wood and why or how this is easier than sticking the piece of wood in the oven for ten minutes?

By stabilizing I'm assuming you mean the same process by which some commercial operators infuse soft or punky wood with plastics so that the wood is more easily and uniformly cut. Since purpleheart is so hard, stabilizing for this reason seems pointless. Besides which, its hardness would seem to me to inhibit the stabilization proces by limiting how much of the plastic would get into the wood. I think all you really get from it is the heat.

And again I say - ten minutes in the oven at 350 degrees and you're done. Easy as can be.

Maybe even easier - use a heat gun and apply after turning, while the pen planks are still on the lathe, so you can watch until you get just the right purple color.

I've done that method too.

Just my thoughts. Looing forward to reading yours.

Julia
__________________
Some say I\'m eccentric - I just say my tool\'s a skew.
jtate is offline   Reply With Quote Top
Related Content
Logged on members can hide ads
Reply

Bookmarks

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 01:27 AM.

Powered by vBulletin® Version 3.7.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0

Content Copyright © 2003-2016 by Penturners.org, LLC; All Rights Reserved
Terms Of Service   Acceptable Use Policy