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.