Directly "burning" images on wood were some of the first uses of engraving lasers. The laser power required
here is often less than 10 watts depending on the laser being used as most are different. Hardwoods like walnut, mahogany
and maple produce good results. Softwoods can be judiciously engraved but tend to vaporize at lessconsistent depths.
Burning a softwood with a fan blowing on it requires lowest power,quickest speed of cut, and enough airflow to extinguish
what is trying meanwhile to ignite. Hard papers and fiberboard work well; linty papers and newsprint are like softwoods.
Fur is not engraveable; finished leathers though can be lase-engraved with a look very similar to hot branding. Certain
latex rubber compounds can be laser engraved; for example these can be used to fabricate inking-stamps.
Standard cast acrylic plastic, acrylic plastic sheet, and other cast resins generally laser very well. A
commonly engraved award is a cast acrylic shape designed to be lasered from the back side. Styrene (as in compact
disc cases) and many of the thermoforming plastics will tend to melt around the edge of the engraving spot.The result
is usually "soft" and has no "etch" contrast. The surface may actually deform or "ripple" at the lip areas. In some
applications this is acceptable; for example date markings on 2-litre soda bottles do not need to be sharp.
2. Stainless Steel
The best traditional engraving materials started out to be the worst laser-engravable materials. This problem
has now been solved using lasers at shorter wavelengths than the traditional 10,640 mm wavelength CO2 laser.
3. Coated metals
However, the same conduction that works against the spot vaporization of metal is an asset if the objective
is to vaporize some other coating away from the metal. Laser engraving metal plates are manufactured with a
finely-polished metal, coated with an enamel paint made to be "burned off". At levels of 10-30 watts, excellent
engravings are made as the enamel is removed quite cleanly. Much laser engraving is sold as exposed brass
or silver-coated steel lettering on a black or dark-enamelled background. A wide variety of finishes are now
available, including screen-printed marble effects on the enamel.
4. Stone and glass
Stone and glass do not turn gaseous very easily. As expected, this makes them generally a better
candidate for other means of engraving, most notably sandblasting or cutting using diamonds and water.
But when a laser hits glass or stone, something else interesting happens: it fractures. Pores in the surface
expose natural grains and crystalline "stubs" which, when heated very quickly, can separate a microscopic
sized "chip" from the surface because the hot piece is expanding relative to its surroundings. So lasers are
indeed used to engrave on glass,and if the power, speed and focus are just right, excellent results can be
achieved . One should avoid large "fill" areas in glass engraving because the results across an expanse tend
to be uneven; the glass ablation simply cannot be depended on for visual consistency, which may be a
disadvantage or an advantage depending on the circumstances and the desired effect.
The demand for personalized jewelry has made jewelers more aware of the benefits of the laser
engraving process.Jewelers found that by using a laser, they could tackle an engraving task with greater
precision. In fact, jewelers discovered that laser engraving allowed for more precision thanother types of
engraving. At the same time, jewelers discovered that laser applied engravings had a number of other
desirable features.At one time jewelers who attempted to do laser engraving did need to use large pieces
of equipment. Now the devices that perform laser engraving come in units. Some entrepreneurs have
placed such units in mall kiosks. That has made laser engraving jewelry much more accessible. The
makers of machines for laser engraving jewelry have developed some very specialized equipment.
They have designed machines that can engrave the inside of a ring. They have also created machines
that have the ability to engrave the back of a watch.
6. Fine Art
Laser engraving can also be used to create works of fine art. Generally this involves engraving
into planar surfaces, to reveal lower levels of the surface or to create grooves and striations which
can be filled with inks, glazes, or other materials. Some laser engravers have rotary attachments
which can engrave around an object. Artists may digitize drawings, scan or create images on a
computer, and engrave the image onto any of the materials cited in this article.
liaocheng ray fine technology co.,ltd