| Laser marks were made on type 304 stainless steel tags |
| Tags were totally immersed in the test solutions. |
| | 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 |
| Hydrogrn 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. |
