CerMark LMM6000 100g. 

• Black, 100 grams.
• Use: Stainless Steel & Pewter
• Certificate of Compliance: TherMark Holdings Inc. warrants Thermark branded laser marking materials to be free from defects in materials and workmanship under normal use.

LMM6000, a CerMark™ product, is one of TherMark’s two general purpose laser marking inks and is recommended for creating black marks on a variety of metals. It has been specially designed to dry in a hard coat which can be handled prior to laser marking without rubbing off. This allows parts coated with the product to be stored, moved or stacked prior to laser marking.
 

If you are interested specifically in marking stainless steel, you should choose LMM6000, as it makes the darkest marks on this substrate. However, the process window  is somewhat narrow, so if ease of use is a concern, LMM14 may be a better option and its marks on stainless are not significantly different from LMM6000.

Recommended substrates:
LMM6000 is a somewhat flexible product which is recommended for many metals. The following list is made up of substrates on which the product works well. This list is not exhaustive, however, so if your substrate does not appear on the list, this does not mean it will not mark it. 

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SDS For Cermark LMM6000

 LMM 6000  coverage