The Crocodile Cage

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In some things, the old ways are the best, and in other things modern advances can provide strong improvements. One process that has definitely improved with modern technology is glass etching.

Glass can be etched in several ways. One of the most common methods from just a few decades ago was chemical etching. This process often used a very strong solution of hydrochloric acid or a fluoride compound to eat away the portions of the glass surface where etching was desired. The process generally required the person performing the etching to wear protective equipment to prevent burns from spilled or splashed. Inhaling the fumes could also be quite harmful if the proper precautions were not taken. As far as the finished product was concerned, the quality of the result depended upon making sure the acid solution stayed where it was supposed to. This could be accomplished by using an adhesive stencil to mask the parts of the glass that were to remain unaltered. However, if not done very carefully, the acid could seep under the edges of the stencil and leave somewhat ragged edges on the design. Then, of course, the used chemicals must be disposed of as well.

Mechanical etching used a high speed rotary bit to mill the glass and engrave a design on the portions of the glass that needed to be etched. Milling machines could be computer controlled and programmed to repeat the exact same design over and over again.

Designs could also be etched by sandblasting. This process used an abrasive to wear away the glass that was to be etched. The sand blasting could be controlled by carefully directing the high pressure stream of the abrasive compound or through the use of a stencil.

Perhaps the most modern of all the glass etching techniques is laser etching. Again, the laser can be computer controlled and can draw the same designs time and time again. Lasers however, have the additional advantage of producing extremely sharp edges and clean, sharp lines. Lasers also have no difficulty with etching on irregular or three dimensional surfaces. Complex images can be etched into shaped objects like champagne flutes with no distortion and no risk of cracking the glass.

If you want an etched glass product made with the greatest precision on any surface, lasers re the way to go. Without harsh chemicals involved, it is also a more environmentally friendly process than some of the others. The set up process is simple and quick and often results in a lower overall charge for laser etched products.