Laser marks were made on type 304 stainless steel tags using LMM-6000 and a CO2 Laser.
Marks were made at settings of 100% power, 12% speed, 500 DPI on a 35 watt Universal Laser.
Tags were totally immersed in the test solutions. |
Test results provided by Ferro Corporation. |
|
Exposure Time |
|
|
Organic Solvents |
|
1 Hour |
12 Hours |
24 Hours |
1 Week |
Gasoline |
|
No effect |
No effect |
No effect |
No effect |
Limonene |
|
No effect |
No effect |
No effect |
No effect |
Methyl Ethyl Ketone |
|
No effect |
No effect |
No effect |
No effect |
N-Butanol |
|
No effect |
No effect |
No effect |
No effect |
Mineral Spirits |
|
No effect |
No effect |
No effect |
No effect |
Xylene |
|
No effect |
No effect |
No effect |
No effect |
Acetone |
|
No effect |
No effect |
No effect |
No effect |
Propylene Carbonate |
|
No effect |
No effect |
No effect |
No effect |
Ethanol |
|
No effect |
No effect |
No effect |
No effect |
DMSO |
|
No effect |
No effect |
No effect |
No effect |
Motor Oil |
|
No effect |
No effect |
No effect |
No effect |
|
|
|
Acid/Bases |
|
Hydrochloric Acid 35% |
|
No effect |
No effect |
Test stopped - see notes |
Nitric Acid 68% |
|
No effect |
No effect |
No effect |
No effect |
Sulfuric Acid (conc.) |
|
No effect |
No effect |
No effect |
No effect |
Acetic Acid 99.5% |
|
No effect |
No effect |
No effect |
No effect |
Hydrogen Peroxide 30% |
|
No effect |
No effect |
No effect |
No effect |
Sodium Hydroxide 25% |
|
No effect |
No effect |
No effect |
No effect |
Ammonium Hydroxide 20% |
|
No effect |
No effect |
No effect |
No effect |
|
|
Other |
|
Boiling H2O |
|
Marks soaked in boiling water for 1 hr. - no effect |
LN2 (Cold) |
|
Marks dipped in liquid nitrogen - no effect |
Flame (Hot) |
|
Marks heated in a propane flame until cherry red - metal discolors, no effect on mark. |
Hot/Cold Cycling |
|
Marks heated red hot and immediately plunged in liquid nitrogen - metal discolors, no effect on mark |
|
Notes: |
|
Hydrochloric acid testing:
|
- Acid dissolves the steel tag and was not run over 12 hrs. long
- After 1 hr. acid dissolved 0.2767 gms off of steel tag (4.7%), laser mark was unaffected.
- After 12 hrs. acid dissolved 1.8057 gms off of steel tag (30.6%), laser mark was unaffected, now having a distinctly raised feel.
|
|
Sulfuric acid testing: |
|
- Acid discolors at approximately 96 hrs., mark appears to be slightly discolored. |
