Don't understand composite film base color problem, the consequence is very serious!

In gravure printing, often can't print out of designers designed by color, so there will be printing a single case, a single wrong so quite heavy loss. By experts, it was with the impression of composite membrane are there. Let's see the impression of several kinds of commonly used composite membrane. 1. Aluminum foil composite film & ndash; — Believe that many people are not very clear, the color of the aluminum foil is the aluminum foil is gray, will be coated with white printing film and aluminum foil, can see clearly that the compound of gray in color. Aluminum foil has the defects of gray, but it is the advantages of metallic luster, in the case of without white background, will ink printed directly on the aluminum foil in, can produce paper printing office without luster effect. 2. Aluminized composite membrane & ndash; — Aluminium coated with aluminum foil more bright beautiful luster. Aluminized composite membrane of the base of color is gray, the color is also associated with the thickness of aluminum plating layer, if the thickness of the aluminum plating layer is too thin, transparent, composite aluminized layer thinner after place will be better than grey, even a little black. 3. Transparent composite film & ndash; — Transparent composite film was found there is no plating aluminum or aluminum foil composite grey problem, but the village its overall effect may be affected by the contents of a package, the other side as well as the packaging color, some transparent compound bag in bag before the effect is good, but after the bag because of the influence of the bag on the back of the color, hue and saturation changes. 4. White & ndash; — Generally there are two kinds of white, yellow, white and blue and white. For beautiful and high purity of purple, cannot use yellow white ink as background or as thinner, otherwise color will darken. Some words are generally adopts the direct pressure color printing, color at this point that may affect the color of the text, make its color hue and saturation change more or less.