wotaen
Harmless
Posts: 22
Registered: 3-8-2015
Member Is Offline
Mood: No Mood
|
|
Burn text into a wood plate
Hi All,
we will have a wooden plate with text carved onto it. The depth of the carving will not be much, just a small dent, 1-3mm
Now we need to fill in this dent so that when put on fire, it'll burn and leave burned mark afterwards. We have a couple of requirements for the fire
and smoke:
1) We want as little smoke as possible. Any smoking must be relatively harmless
2) The fire must not be energetic enough so that the entire plate catches on fire
3) The substance must burn for maximum 30 seconds - any wood burning can be then put out normally
4) Fire must be "predictible" so there is small chance of local pressure buildups so to avoid splatter
5) If possible, the substance must be somehow putty-like, we want to present the burning plate at about 45 degrees angle. Not critical requirement
6) If possible the substance burns fully, so doesn't leave blobs of burned stuff
So far we've tried this:
* KNO3 + sugar - KNO3 not finely powdered, too much smoke generated
* Very crude black powder, KNO3 and Sulphur not finely powdered - burned nice, too much smoke. Sulphur oxides in the smoke is a minus
* Ethanol (maybe it was gasoline) mixed with some soap to form a snake that will burn - we tried this a few years back and it wasn't that impressive -
burned for too long and got boring
We're planning to try:
* fuse cord - shape letters from it (maybe glue to the board)
* magnesium ribbon - same as fuse cord
* KMnO4 + glycerin - never tried this but it seems that the amount of smoke produced is not too bad. Also the color of the flame is a bonus. If the
letters are big enough, the reaction could start nearly at the same time while not ending up in a big flame.
Do you have any other suggestions on which path to follow?
Thanks
[Edited on 14-7-2016 by wotaen]
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
| Quote: | | Do you have any other suggestions on which path to follow? |
Certainly! Just google "pyrography"?
|
|
|
wotaen
Harmless
Posts: 22
Registered: 3-8-2015
Member Is Offline
Mood: No Mood
|
|
No kiddin! There's a word for everything  , thanks
|
|
|
TinSandwich
Harmless
Posts: 29
Registered: 24-2-2016
Member Is Offline
Mood: No Mood
|
|
If you actually want to get a good looking result and not just have fun with experimenting you should buy a pirographer/soldering iron.
|
|
|
mayko
International Hazard
Posts: 1218
Registered: 17-1-2013
Location: Carrboro, NC
Member Is Offline
Mood: anomalous (Euclid class)
|
|
If you want to experiment with non-chemical techniques:
| Quote: |
WOODBURNER
Once I had a brainstorm, and when I tried it out, it actually worked: send intense light into one end of a fiber-optic cable, and use the other end as
a woodburner. I used an expensive glass-fiber cable 1cm in diameter which was about 1/2m long, and I placed one end of the cable at the focus of a
12-in fresnel lens in summer sunlight. The other end of the cable could char a wood surface, but just barely. A bigger solar furnace might have made
it impressive. Sign your name as charcoal! Note: if you try this stunt, realize that you probably will damage your fiber optic cable, so don't try it
with one that you can't afford to lose! Plastic opto fibers might melt, so use glass if anything.
|
source: http://amasci.com/amateur/mirror.html
al-khemie is not a terrorist organization
"Chemicals, chemicals... I need chemicals!" - George Hayduke
"Wubbalubba dub-dub!" - Rick Sanchez
|
|
|
PHILOU Zrealone
International Hazard
Posts: 2893
Registered: 20-5-2002
Location: Brussel
Member Is Offline
Mood: Bis-diazo-dinitro-hydroquinonic
|
|
Smokeless powder dissolved into aceton (a liquid viscous resin thus) and set into the carving; then dried into the open.
Once dry set in fire...by definition smokeless burns fast and without smoke...
The products of combustion are about as toxic as those of a candle...
The flame will take from 1s to 30s to burn.
PH Z (PHILOU Zrealone)
"Physic is all what never works; Chemistry is all what stinks and explodes!"-"Life that deadly disease, sexually transmitted."(W.Allen)
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
PHILOU, SP is less readily ignitable than you seem to assume ─ cordite is often difficult to ignite as loose powder on a flat surface and ballistite
more so!
As a thin, enamel film bonded to cutout depressions in wood it may not properly take fire at all ...
|
|
|
wotaen
Harmless
Posts: 22
Registered: 3-8-2015
Member Is Offline
Mood: No Mood
|
|
Quote: Originally posted by PHILOU Zrealone  | Smokeless powder dissolved into aceton (a liquid viscous resin thus) and set into the carving; then dried into the open.
Once dry set in fire...by definition smokeless burns fast and without smoke...
The products of combustion are about as toxic as those of a candle...
The flame will take from 1s to 30s to burn. |
I'm pretty sure I can't buy cordide anyway and I don't want to attempt to make my own. Pyrography actually lead to some interestingn techniques. Since
this is one time demo and must have somewhat wow effect, solder is out. While looking into the topic of pyrography I saw some people doing it with
black powder. The amount of smoke was not that bad and if I grind KNO3 better it may even work without sulphur...will give it another go.
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
Omitting sulphur will make BP much more difficult to ignite ...
Sulphur the life, saltpeter the soul and charcoal the body of it!
|
|
|
wotaen
Harmless
Posts: 22
Registered: 3-8-2015
Member Is Offline
Mood: No Mood
|
|
Should ever try it - both attempted methods (mg strip, kmno4 + glycerol) just burn little bit too much. The wood is charred everywhere.
The search is on
|
|
|
Texium
|
Thread Moved
23-8-2016 at 08:38 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
