Assertion: anodized aluminum | /r/HasProperty | photo anodized aluminum
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text: Photosensitive anodized aluminum, also referred to as photo anodized aluminum, photo metal or Metalphoto, utilizes the porous nature of unsealed anodized aluminum to create a sub-surface image, either through exposure and development of an anodic layer impregnated with silver compounds (Type 1), much like traditional black & white photography, or through use of a photomask (Type 2) in which the image is created through a variety of means, including chemical etching, color addition or color subtraction.