JPH09249425A - Patterned glassware and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure its hygienic safety by inhibiting the heavy metals from bleeding on the surface of glassware and develop bright patterns with good development of colors by drawing the patterns with heavy metal-containing paints. SOLUTION: A glass base material 1 having a pattern drawn with a paint 4 on its upper surface 2 is placed through a release paper 5 on the setter 6 (a). The paint 4 contains heavy metal and glass thin flakes 7 are placed on the upper surface of the paint 4. The glass base material 1 is gradually heated from the upper face 2 to raise its temperature up to about 800 deg.C and is kept at about 800 deg.C for about 30 minutes. The glass base material 1 begins softening from the upper surface (b), the paint of low softening point and high specific gravity sinks into the inside of the glass base material and is perfectly buried in. The bottom face 3 of the base material 1 is suppressed in its temperature rise not to soften whereby the paint stays in the glass material buried (c). The temperature is lowered, the glass base material is formed by bending to give a patterned glassware 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a patterned glassware using a paint containing a heavy metal and a method for manufacturing the patterned glassware.

[0002]

2. Description of the Related Art Painting a paint containing a heavy metal such as lead on a glassware has a problem in food hygiene because the heavy metal contained in the paint may be exposed on the surface. Therefore, as a conventional painting method, a method of printing the patterns 10 and 10 on the outer surface of the glass device 11 or baking the patterns 10 and 10 using transfer paper is generally used (FIG. 2).

[0003]

In the method of using printing or transfer paper on the outer surface of the glassware 11, the patterns 10 and 10 are limited, and in particular, in the case of a glassware having an uneven surface, There was a significant problem.

[0004]

However, according to the present invention, the pattern represented by the paint containing the heavy metal is buried in the glassware.

That is, the present invention is a glassware in which a pattern represented by a paint containing a heavy metal is buried in a glass substrate having a light-transmitting property. Further, the glass substrate is characterized in that at least the pattern-embedded surface of the glass substrate is coated with glass.

In the invention of the method, a pattern is displayed on the upper surface of a glass base material placed on a setter via a release paper with a paint containing a heavy metal, and then the glass base material is heated from above at a predetermined temperature. Then, the upper part of the glass base material is softened, the pattern is embedded in the glass base material, and then the glass base material is molded into a predetermined shape.
The heating in the above is a method of manufacturing a glassware, which is characterized by gradually raising the temperature to 800 to 850 ° C.

The above-mentioned light-transmitting property means a state of being transparent or semi-transparent and showing a pattern buried in the glassware from the surface of the glassware.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A pattern is drawn on a top surface of a glass base material by a conventional method using paint containing a heavy metal. From the top surface of the glass base material, gradually heat to soften the upper part of the glass base material,
A pattern formed by a paint having a lower softening temperature and a higher specific gravity than the glass substrate sinks into the softened glass substrate. Since the lower surface side of the glass base material is brought into contact with the setter to suppress the temperature rise of the glass base material, the lower surface side of the glass base material does not soften. The paint stays inside the glass substrate, and the upper part of the paint is covered with the melted glass substrate so that the pattern appears to be buried in the glassware.

[0009]

Embodiment 1 An embodiment of the present invention will be described with reference to FIG.

Paints 4 and 4 containing a heavy metal are attached to the upper surface 2 of the glass substrate 1 having a predetermined shape by transfer paper or direct printing, and glass flakes 7 are placed on the upper surfaces of the paints 4 and 4, respectively. ing. The glass substrate 1 and the glass flakes 7 are made of lead-free and cadmium-free glass.

The release paper 5 is placed on the setter 6, and the glass substrate 1 with the paint 4 is placed on the release paper 5 (FIG. 1 (a)). Next, the upper surface 2 of the glass substrate 1 is gradually heated.

For example, using soda glass, a thickness of 0.4
When the glass substrate 1 of cm is molded, the temperature is 10 to 15 ° C /
The temperature rises at about 1 minute and about 800 minutes at about 90-120 minutes
Heat up to Subsequently, 800 ° C. is maintained for about 30 minutes.

At this time, the glass substrate 1 starts to soften from the upper surface (front surface side) 2 (FIG. 1 (b)). Glass softening temperature is about 5
The softening temperature of the paint is 600 ℃ against 50 ℃, and the specific gravity of the paint is higher than that of the glass. Toward)). When the heating is continued, the melted glass base material 1 and glass flakes 7 are in contact with the upper surface side of the paint 4. The paint 4 completely sinks and is embedded in the glass substrate 1.

Further, since the lower surface 3 of the glass substrate 1 is in contact with the heat-resistant setter 6 via the release paper 5, the temperature rise is suppressed and the lower surface 3 side of the glass substrate 1 is not softened. Therefore, the paint 4 remains embedded in the glass substrate 1 (FIG. 1C).

In this state, the temperature is lowered and the glass substrate 1
Is bent and molded into a predetermined shape, and the patterned glassware 8 is completed in a state where the temperature is lowered to room temperature (FIG. 1 (d)).

In the above, the rate of temperature increase, the upper limit temperature and the duration thereof are adjusted depending on the material and thickness of the glass substrate, the type and area of the paint, and the like.

In the above-mentioned embodiment, the glass flakes 7 are placed for each of the paints 4 on the glass substrate 1. However, one glass thin piece (thin plate) that can cover the entire glass thin pieces (thin plate) paints 4, 4 ) May be placed, or it may be covered with one glass thin piece (thin plate) capable of covering the entire upper surface 2 of the glass substrate 1 (neither is shown). Also,
The glass flakes 7 may be omitted.

Further, in the above-mentioned embodiment, if the embedding of the paint in the glass substrate is insufficient, if necessary, only the pattern embedding surface (upper surface) of the glass substrate or the entire surface of the glass substrate is further covered with glass. Can also be coated with (not shown).

[0019]

According to the present invention, since the pattern represented by the paint containing the heavy metal is embedded in the glass base material, the heavy metal is not poured out on the surface of the glassware, and even when it is used for tableware, it is hygienic. It has the effect of ensuring the above safety. Also,
Since a paint containing a heavy metal can be used for the pattern of the glassware, it is possible to express a vivid pattern with good color development and to broaden the range of choices of the pattern to be drawn.

[Brief description of drawings]

1A to 1D are vertical cross-sectional views showing a manufacturing process of a glassware according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a conventional glassware.

[Explanation of symbols]

 1 Glass substrate 2 Upper surface (glass substrate) 3 Lower surface (glass substrate) 4 Paint 5 Release paper 6 Setter 7 Glass flakes 8 Glassware

Claims (4)

[Claims] 1. A patterned glassware in which a pattern represented by a paint containing a heavy metal is embedded in a transparent glass substrate. 2. The patterned glassware according to claim 1, wherein at least the pattern-embedded surface of the glass substrate is coated with glass. 3. A glass substrate which is placed on a setter via a release paper and has a pattern formed on the upper surface of the glass substrate by a paint containing a heavy metal, and the glass substrate is heated from above at a predetermined temperature. A method for manufacturing a patterned glassware, comprising: softening the upper part of the glass substrate, burying the pattern in the glass substrate, and subsequently molding the glass substrate into a predetermined shape. 4. The heating is performed by gradually raising the temperature to 800 to 8
The method for producing a patterned glassware according to claim 3, wherein the temperature is raised to 50 ° C.