Aluminum foil may have various features that clients find undesirable — usually because these imperfections lead to problems with lamination. Laminating is the process of affixing another substrate to aluminum foil. The material can include paper, film, and extrusion laminations.
Commodity is committed to distributing quality foil to its clients from the best mills in the world.
PINHOLES
Pinholes are small pinpricks in the aluminum foil. The thinner the gauge, the more likely there will be pinholes. Pinholes are problematic because it allows foreign materials, moisture and vapor into any product the aluminum is protecting. For example, in solid glue laminations, pinholes will allow the transfer of glue between substrates.
WETTABILITY
Wettability is the amount of rolling oil left on the sheet of aluminum after processing. In the rolling process there are thousands and thousands of gallons of oil that is applied to the aluminum for lubrication during rolling. This oil is then baked off when the aluminum is heated to make it more malleable. Occasionally, too much oil remains on the aluminum, which can affect the lamination process.
DROPPED EDGES
Dropped Edges is when the edges of the aluminum foil turn down and the sheet is not flat. This can cause poor lamination and wrinkles.
SPIRAL ROPE
Spiral Rope is a corkscrew impression in the foil. Spiral Rope is usually caused by an imperfection in the casting. This can cause possible wrinkles in the lamination process.
TIN CAN
Tin Can imperfections in foil are where there are ridges in the foil, which may lead to problems with lamination.
“The bitterness of poor quality lingers long after the sweetness of low price is forgotten.”
~ Benjamin Franklin