Specifications

BRASS - COATED

TYPE POWER SPEED PPI PASS DEPTH

RASTER ENGRAVING 30 100 1000 1 .002”

much power loses resolution and washes out finer

etail.

COMMENTS: Engrave unmasked. Use a light setting to engrave through the coating.

Using 1000 PPI seems to have a cleaner removal of the coating. Some thicker coated

brass will require more power. Too

TYPE POWER SPEED PPI PASS DEPTH

VECTOR ENGRAVING 15 4.0 1000 1 .002”

COMMENTS: Engrave unmasked. Use enough power to expose the brass. Too much

power will cause thicker engraving lines.

ADDITIONAL COMMENTS

The manufacturing processes for coated brass varies from one vendor to another.

t penetrating

all the way down to the metal. Since the brass is already clear coated and polished, it

will not require any cleanup after engraving nor will it ever oxidize. If too much laser

power is used, the brass the clear coat will be removed and the brass underneath will

be exposed to the heat of the laser beam causing instant tarnish. The same goes for

enamel coated pens, some are polished and clear coated underneath, and others are

tarnished which will require polishing after engraving. If polishing the brass, use a soft,

non-abrasive cloth or tissue and good quality brass polish. Be careful not to rub too

hard as this will scratch the painted coating. Do not use paper towels either because

they will scratch also. Clear coated brass can also be engraved and the engraved area

turned black with an oxidizer giving exceptional results. Test clear coated brass from

different vendors as not all of them will work properly. If the brass, after being

engraved, does not oxidize with the acid solution, apply automotive fine grit rubbing

compound to the engraved area with a soft cloth. This will remove any clear coat that is

remaining and will allow the brass to oxidize with the acid. Apply the same parameters

and engraving techniques when using coated aluminum.

Some of the manufacturers do not polish the brass before coating it. Since CO

lasers

at this power level do not engrave into metals when the coating is removed, the

tarnished brass underneath will have a dull appearance that will need to be polished

with a brass polishing compound. This type of brass is designed for mechanical

engravers that actually remove the metal when engraving which gives the brass a shine

without polishing. Brass that is produced for the laser engraving industry is polished,

then clear coated, and finally coated with paint. When laser engraving this type of

material, adjust the power so that the laser beam removes the painted coating but not

the clear coating. This will expose the polished, clear coated brass withou