Exella - photoetchingFrequently asked questions about chemical machiningSite Map
Exella - photoetching, photo etching, fotoincisione, fototranciatura, eyewear, glasses, modelism, fuel cells, chemical machining

Frequently asked questions about chemical millingphoto-etching datadatasheets
photo-etching process What's "photo-etching"?
Photo-etched eyeglasses parts The method of photo etching, or chemical machining, is a sophisticated system to cut and engrave with precision metal plates, even very thin ones, that replaces to your advantage the traditional shearing and engraving. The drawing of the requested pieces is made on the computer, and then "photographed" on the metal plate. An elaborated process of acid baths melts the margins, cuts and engraves the plates even on several levels.
photo-etching applications What type of pieces can I make?
Photo-engravedjewelry
Parts for metal glasses and ornaments for plastic glasses, parts for micromechanics and electronics, parts for fuel cells, special series of valuable objects, parts for pens and clocks, pieces for railway or motoring modelism, modern art objects, clothes accessories,jewelry, metallic labels, etc…
Engraving finishingWhat finishing can I get for the engraved pieces?

The pieces are usually delivered as "plates" with smooth surfaces polished aspect, with two little clamps (attachs) that can be easily removed. The copper (brass, bronze and nickel silver) alloys can easily be tin brazed or welded with silver alloys, polished with abrasive wheels or vibration and strainer systems.
The EXELLA materials are tested to accept all the most frequent galvanic treatments (with copper, nickel, silver, gold, rhodium, etc). The beryl copper can be submitted to several thermal treatments, to obtain surprising elastic and durability characteristics (even more than 400 Vickers).
There are also available stainless steels with already mirror bright sourface (ba).
Materials for photo-etching In which materials can I make my orders?
Scale models parts realized in chemical machining
Brass, Bronze and special bronzes, Nickel Silver, Beryl Copper, Aluminium, ordinary and special Steel and Stainless Steel (inox). The plates can have formats starting from 100 x 300 mm to 400 x 1000 mm, with thickness from 0,03 to 1,20 mm.
Files for photoetching artwork What do I need to produce the pieces?
A pattern or a design on paper, or in any of the following graphical formats: dwg, dxf (AutoCAD or other software that use these formats), rhn (Rhinoceros), stl, igs, cdr (Coreldraw), ai (Illustrator), pdf, fh11, tiff, bmp, tga, eps, etc... Even a photo can be enough, if provided with the most important dimensions.
Technical and informative sheets are available in the datasheets section.
Molds costs Are the moulds expensive?
Electrical parts realized in photoetching
The photo-etching process doesn't require traditional moulds. The plates are masked before engraving in acid using a digital high definition process (xmos).
At the beginning of the production of every article, and only for the first time, a fee is charged for preparing the file, a fee consisting in a few tens of euro, depending on the complexity of the model.
Minimum quantities for photo-engraving orders What's the minimum quantity I can order?
You can order even 10 small plates (or all the pieces contained in them), and the prices don't depend on the quantity. The products are shipped by express delivery.
Photo-etching page
Materials for photo-etching
Design guidelines for photo-etching
Exella Photo-etching and chemical machining
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