JPS62267182A - Method for multicolor printing on plastic case - Google Patents

Abstract

PURPOSE:To shorten a time required for a delivery and to enhance yield by enabling to perform a continuous printing operation, by performing a solid printing of an anchor according to an offset printing method, and performing a printing in other colors on the surface of the anchor according to the offset printing method. CONSTITUTION:At first, a solid printing of an anchor 2 is performed on a case 1 according to an offset printing method and, after the anchor 2 is dried, printings of other colors such as yellow 3, red 4, blue 5 or the like are performed on the surface of the anchor 2 according to the offset printing method. The anchor 2 printing by offset solid printing requires no long time for drying under heating. Accordingly, since the printing can be performed continuously, the shortening the time required for a delivery and reduction of cost can be promoted to a large extend, and there arises no trouble of a case being extended or shrunk by heat at the time of drying, therefore, printing accuracy can easily be attained, and yield is also enhanced markedly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for multicolor printing on a plastic case, for example for housing a magnetic tape cassette.

Conventionally, multicolor printing on such a case involves printing an anchor solidly on the surface of the case using a silk screen printing method, and then printing other colors on the anchor using an offset printing method.

However, when the anchor is marked 411'& using the silk screen printing method, the ink fills up well (
, it is possible to perform clear printing and the effect of concealing the background color is large, so there is an advantage that there is almost no shadow 11'r of the background color, but on the other hand, it takes a long time to heat and dry the solid printed anchor. However, since the printing speed is slow, it is not possible to shorten the delivery time and reduce costs.In addition, in this case, in order to prevent the case from expanding and contracting due to the heat during drying, offset printing is performed on the surface of the anchor. When performing color printing, there is a drawback that the printing accuracy is impaired and the yield is poor.

The object of the present invention is to overcome these conventional drawbacks by devising a method for printing an anchor and printing other colors on the surface of the anchor in an integrated manner by offset printing. Therefore, it is an object of the present invention to provide a multicolor printing method for plastic cases, which can shorten delivery time and reduce costs, as well as improve printing accuracy and yield.

The feature of the multi-color printing method for plastic cases of the present invention is that in multi-color printing on plastic cases, an anchor is printed solidly by an offset printing method, and another color is printed on the surface of the anchor by an offset printing method. The purpose of printing is to print in the following colors.

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. In FIG. 1, l is a plastic case, which is made of transparent or colored plastic. On this case I, a solid print of, for example, a white anchor is applied over a wide area by an offset printing method, and after the solid-printed anchor dries, the solid printing is completed as shown in Fig. 2. By offset printing, another color, for example yellow 3. Red da, blue S, etc. are printed.

In this way, anchor 2 is first printed solidly on case 1 by offset printing, and after drying anchor 2, another color (yellow 3) is printed on the surface of anchor 2 by offset printing. Akahiro.

When printing fS etc., the first side of the case is completely covered by the white anchor λ printed solidly by offset printing method, so the other color yellow 3. Akahiro, t,! - has good color development and sufficient lf degree, so you can expect a good finish, and the other colors printed on the surface of the anchor 2 are 3゜wide, and the S is strongly supported by the solid printed fine 1 anchor 2. Therefore, various problems such as abrasion resistance, adhesion resistance, weather resistance, and chemical resistance can also be solved.

As mentioned above, in multicolor printing of glass crack cases, the present invention uses an offset printing method to print anchor bases.
Anchors with solid markings such as those printed with other colors by offset printing method on the surface of the anchor by conventional silk screen printing method. It does not require a long time to heat and dry the anchor, and it is possible to perform solid printing of the anchor and multicolor printing on the surface of the anchor continuously, which greatly reduces delivery times and costs. In addition, since the case does not expand or contract due to the heat generated during drying of the anchor, there are advantages in that printing accuracy is easily achieved and the yield rate is also significantly improved.

[Brief explanation of drawings]

Figure 1 is a side view of the case showing the state in which the anchor has been printed solidly by offset printing, and Figure 2 is a side view of the case showing the state in which other colors have been printed on the surface of the anchor by offset printing. It is. l...case, co...anchor, 3.4! ,! ;・
...Other colors.

Claims (1)

[Claims] Multicolor printing of a plastic case, characterized in that, in multicolor printing on a plastic case, an anchor is solid printed by an offset printing method, and another color is printed on the surface of the anchor by an offset printing method. Method.