View previous topic :: View next topic |
Author |
Message |
Mat Roop Senior Member
Joined: 24 Mar 2007 Posts: 911 Location: Wyoming Ontario
|
|
Back to top |
|
|
FiddleDoug Member
Joined: 08 Sep 2007 Posts: 227 Location: Hilton, NY
|
Posted: Fri Oct 25, 2013 5:08 pm Post subject: |
|
|
I've used Potassium Permanganate for various things in the lab, over many years. One of the mechanisms of the brown color, is formation of insoluble Manganese Dioxide as the permanganate is reduced. MnO2 is kind of blackish, and this gets into the surface of the wood to form the brownish color. _________________ Doug Wall
www.wallindependent.com |
|
Back to top |
|
|
DonLeister Moderator
Joined: 29 Mar 2007 Posts: 383 Location: Richmond, VA
|
Posted: Sat Oct 26, 2013 8:41 am Post subject: |
|
|
So it is not solely oxidation of the wood right? I have never used it before, what does that look like on spruce? Has anyone used it? |
|
Back to top |
|
|
Michael Darnton Moderator
Joined: 23 Mar 2007 Posts: 1281 Location: Chicago
|
Posted: Sat Oct 26, 2013 10:58 am Post subject: |
|
|
OK on the inside, as she's using it, to hide something that will only be looked at in bad light with a mirror, but you wouldn't like what it would do in context on the outside. That type of chemical treatment tends to darken the soft wood disproportionately, resulting in a dirty wood look. _________________ new blog at my site! http://darntonviolins.com/blog
my work sites: http://darntonviolins.com and http://darntonhersh.com |
|
Back to top |
|
|
ollieken Super Member
Joined: 26 Mar 2007 Posts: 281 Location: New Brunswick Canada
|
Posted: Sun Oct 27, 2013 2:40 pm Post subject: oxalic acid |
|
|
I have used oxalic acid in crystal form to kill mites in bee hives .
I can tell you that when it is heated to go into a vapor it is very
bad I used a mask & gloves you don't want to inhale it Mat Rope may know what I am saying as he was a bee keeper till they got at his
family Jule..s Ha ha
I don't think it is something to have laying in a shop so if you decide to try it be careful don't heat it to go in a vapor Ken |
|
Back to top |
|
|
Michael Darnton Moderator
Joined: 23 Mar 2007 Posts: 1281 Location: Chicago
|
Posted: Sun Oct 27, 2013 2:46 pm Post subject: |
|
|
Something that I learned a few years ago about cleaning: distilled water works great. The pure stuff, expensive, is deionized, but distilled is functionally the same. It works because water normally contains minerals, etc, chemically locked into it. In distilled/deionized water, those handles are free to grab anything that comes along, and the various things that we perceive as darkening cracks qualify. Use it hot--like, boiling.
For something stronger, use strong hydrogen peroxide from the beauty supply shop. Be careful--this stuff is strong, and it burns. Use eye protection, and keep it off your skin!
I haven't found oxalic acid necessary since I learned of these two cleaners. _________________ new blog at my site! http://darntonviolins.com/blog
my work sites: http://darntonviolins.com and http://darntonhersh.com |
|
Back to top |
|
|
|