Physical Testing of LMM-6000 Laser Marks

• 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.

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

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.