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Anodized aluminum is commonly engraved or etched with CO 2 laser machines. With power less than 40W this metal can easily be engraved with clean, impressive detail. The laser bleaches the color exposing the white or silver aluminum substrate.
The anodizing current varies with the area of aluminium being anodized and typically ranges from 30 to 300 A/m 2. Aluminium anodizing (eloxal or El ectrolytic Ox idation of Al uminium) [ 12 ] is usually performed in an acidic solution, typically sulphuric acid or chromic acid, which slowly dissolves the aluminium oxide.
A standard channel letter is a three-dimensional graphic sign element. Its channel is fabricated from sheet metal, most often aluminum since it will not rust. A flat sheet of aluminum is typically cut on a table by a computer-controlled router, laser, or water jet, based on a vector-based art file (.cdr, .eps, .ai, .scv, .sci, or .fs).
Type 2 photosensitive anodized aluminum is typically coated with a photo resist, which may be of either the positive or negative type. Exposure of the photo resist through a negative and its subsequent development creates areas on the plate that are either protected by the resist or exposed to the effects of the dye, bleach, or etchant that are ...
PHOTO: One person was injured when a holiday drone show in Orlando on Dec. 21, 2024, went haywire and several of the unmanned aerial devices crashed into each other and plummeted to the ground ...
It was only a matter of time. From the moment Cody Bellinger chose to pick up his $27.5 million player option for the 2025 season, rather than becoming a free agent, it became increasingly clear ...
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