MIL-STD-130 Identification Marking Of U.S. Military PropertyThis standard provides the item marking criteria for development of specific marking requirements and methods for identification of items of military property produced, stocked, stored, and issued by or for the Department of Defense DoD. This standard addresses criteria and data content for both free text and machine-readable information MRI applications for identification marking of U.S. military property.

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Marking

Methods

Mark

Characteristic

HRI

1D

2D

Recommended Use

Blast (grit) (with pre- encoded stencils)

Variable depth or height

y

N

N

Abrasive method which can be used on most surfaces.

Acid etch (with pre- encoded stencils)

y

N

y

Characters produced by use of acid.  Use on metal and glass.

Vibro peen

y

N

N

Metal or nonmetallic parts that may deform if metal stamped.  Hand held operation.

Metal stamp

y

N

N

Metal or nonmetal parts that will not deform under the stamping pressure required.  Also, the alteration of the surface roughness finish will not be detrimental to proper functioning.

Dot peening

y

N

y

Metal or nonmetal parts that may deform if metal stamped.

Engraving

y

N

N

Sheet metal fabrication that will deform if metal stamped.  Functional marking with color filler.

Embossing

y

N

N

Thin sheet metal, plastics on nonfunctional surfaces.

Cast or forged (with pre-encoded stencils)

y

N

y

Castings or forgings - characters raised or depressed depending on method of manufacture, unless otherwise specified on the drawing.  Marking should be used on non- machined surfaces only.

Molded (with pre- encoded stencils)

y

N

y

Usually plastic or rubber parts may be either raised or depressed, unless otherwise specified.

Electro-chemical etch

(electrolytic process)

y

y

y

Characters normally depressed, but may be raised.  Used on fine surface finishes without protective coating, also high hardness parts (HRC 50 or higher).

Laser discoloration

Surface mark

y

y

y

Heat from the laser discolors the material surface without associated metal removal.

Laser (paint pigmentation)

y

y

y

Chemicals added to some plastics that will react by changing color when contacted with a laser.

Laser (bonding)

Raised mark

y

y

y

Mark produces by bonding a medium to the surface of an item, marking with a laser and producing a raised mark.

Laser (engraving)

Variable depth

y

y

y

Very good resolution of alphanumeric and machine-readable marking symbology. Character height and width range from .007 to

4.0 inches.

Laser (etching)

Generally limited to 0.001 inch maximum depth; done at lower power settings.

Laser markable inks/paints

Surface mark

y

y

y

Inks and paints containing pigments that discolor when struck with a laser beam.