Clear Lacquer Coatings
Many decorated metal manufacturers will use a specific type of coating adapted to their specific products and their intended usage. In architectural applications, most decorated plain sheet metals in Copper and Aluminum are coated with a nitrocellulosic type lacquer. Whereas other metals and metal laminates use epoxy or urethane coatings.
GageMetal specifically recommends our FRC (Fingerprint Resistant Coating) to protect stainless steel, particularly in higher traffic areas and where formability is required.
Selective Transparent Color
With this process a base metal can be selectively covered by a thin layer of any transparent color securely bonded to the substrate. The underlying decorative finish is visible through the transparent color, creating spectacular decorative finishes. A GageMetal exclusive.
Colored Stainless Steel – Inco Process
Unknown to most, stainless steel does have a layer of oxide, but a transparent one. The INCO process can electrochemically alter this oxide layer. This produces an appearance of color ranging from black, navy blue to reddish and golden tones.
By applying a decorative masking to such materials, this layer of oxide can be removed selectively, to expose the underlying silver color of Stainless Steel. The result are very attractive 2 color design patterns.
Metal Colors, Tolerances, Variances
Any metal surface, plain or laminated, may show very slight variances in the color of the alloy, from sheet to sheet. If this variance is virtually absent in most aluminum alloys it does exist more often in Stainless Steel sheets and more often still in Copper alloys.
These variances have their origin in production methods and batch mode production in the steel mills. Highly structured design patterns or rough type textures are often the best way to overcome such variances. A specifier should establish some parameters of acceptable tolerances when this is important.
PVC Mask/Peel Coating
All decorated sheet metal and laminates are always shipped with a protective and removable peel coating. Some of them are colored white, blue or black. Most decorated metal design patterns are covered with a transparent peel coating. Peel coat does not only protect during handling and transport, but especially during fabrication. Therefore the thickness of peel coats should not be less than 0.002″ (0.05 mm), with an optimal protection with 0.004″ (0.10 mm). Any premature removal of a peel coating may expose the metal to possible damage during fabrication and/or installation.