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Frequently Asked Questions

Q. How do I apply LMM-6000?           

We recommend that LMM-6000 be applied by spraying directly onto the substrate to be marked.  LMM-6000 can also be applied by brushing or painting, but care must be taken to ensure an even coat is applied.  Any variation in the coating such as brush marks may translate into variation in the final mark appearance.  Spraying will give you the best results and the most evenly applied coating. 

Q. How much LMM-6000 do I apply? 

You should apply only enough LMM-6000 to hide the metal surface underneath the coating.  Applying more LMM-6000 will result in having to use more laser power to make marks, it will not make the marks darker. 

Q. How do I thin LMM-6000? 

LMM-6000 should be thinned with denatured alcohol or ethanol.  Add the ethanol or  denatured alcohol to the LMM-6000 and stir or shake thoroughly. 

Q. How much thinner do I need? 

LMM-6000 can be used as is for brushing but should be thinned as needed to apply by spray.  We recommend a maximum thinning ratio of 2 parts LMM-6000 to 1 part ethanol for spraying.  Ethanol can also be added to help aid in brushing, it will help brush marks flow out. 

Q. What do I clean LMM-6000 up with? 

            LMM-6000 can be cleaned up using plain water. 

Q. What metals does LMM-6000 work on? 

LMM-6000 has been tested on stainless steel, aluminum, brass, copper, nickel, silver, and titanium. 

Q. How long will the marks last?  How tough are they? 

Marks made with LMM-6000 are permanent.  Marks made with LMM-6000 are generally considered to be as tough as the metal they are made on.  Physical testing has shown them to be resistant to several common strong acids, bases, organic solvents and extreme heat or cold.  LMM-6000 also has good salt spray resistance, scratch resistance and QUV resistance. 

Q. How high or thick are the marks? 

Marks made with LMM-6000 have been examined by scanning electron microscope and have been found to be approximately estimated 10 mm or 0.0004 inch (0.4 mil) high. 

Q. Can I reuse LMM-6000? 

LMM-6000 should not be reused if it has been dried out or sprayed on.  Reused LMM-6000 will not produce a high quality mark.  Performance characteristics will also be affected. 

Q. What kind of laser do I need? 

            LMM-6000 can be used with CO2 or YAG lasers. 

Q. How much power should I use? 

The power settings that LMM-6000 will work best at vary depending on the laser being used.  For example, on a 35 watt CO2 laser, marking on stainless steel requires using 100% power at a write speed of 4-8 inches per second.  Marking on aluminum requires 100% power at a write speed of 1-4 inches per second with the same laser.  A more powerful laser will be able to make the same mark using less power or writing faster. Also, aluminum, copper, brass and other soft, heat conductive metals require higher powers and slower writing speeds. These metals will conduct heat away from the marking area faster than the steel, thus requiring more heat (power) to make a mark.  Your power settings will vary depending on the laser used and the substrate being marked, so some experimentation may be necessary to achieve the best mark. 

Q. Does LMM-6000 work on glass? 

No.  LMM-6000 is not to be used on glass surfaces.  It is designed to work only on metal surfaces.  Cermark also offers RD-6001 Bronze, RD-6013 Blue and RD-6044 Black for laser marking on glass substrates. 

Q. Will LMM-6000 work on coated metals? 

No.  If the metal has a protective coating on it, the coating must be removed before it can be marked.  The protective coating will interfere with LMM-6000’s ability to bond to the surface of the metal. 

Q. Will LMM-6000 work on anodized metals? 

LMM-6000 has generally been found to not work on anodized metals, but in some cases satisfactory results have been reported.  We recommend experimentation if possible to determine if LMM-6000 will work in your particular application. 

Q. How many marks can I get out of one pound of LMM-6000? 

When thinned and used as recommended, one pound of LMM-6000 should provide a minimum of 5000 square inches of coverage.  The number of marks you get will depend on the size of the mark and how much material you apply to the substrate. 

Q. Can I get blacker marks with a thicker coat of LMM-6000? 

No.  Additional LMM-6000 film thickness will only result in more power being needed to make a mark, it will not make the marks any darker. 

Q. What other colors for metal are currently available? 

Currently we only offer a black mark on metal substrates.  Research efforts are underway to develop additional colors for metal.