1. Application

    The main application of glass enamel is decorating tempered glass (architectural glass,home appliance glass,furniture glass) and auto glass .

2. Tempered glass enamel

    Type: architectural glass;home appliance glass;furniture glass

    Function:

    decoration

    conceal the frame of building, electronic component or for showing.

3. Auto glass enamel

    Type: Front windshield glass enamel;Rear windshield glass enamel;Side winshield glass enamel and silver paste.

    Function:

    To prevent ultraviolet radiation through the glass

    To prevent the glue used to bond the glass and car occur chemical change

    Conceal some conductive lines

    Decoration

4. Decorate glass ware

    Type: cosmetic bottle,beverage bottle,wine bottle,tableware cup[

    Function:

    decoration

    develop the new product

    fix the label

5. The composition of glass enamel

    1) The powder of glass enamel: Frit and Pigment

        a.Frit: a mixture of silicon dioxide as a main component and melted at a high temperature

        b.Function:

        sintering performance,the combination of ink and glass

        Wear resistance

        Chemical resistance

        Thermal expansion coefficient

        Gloss

        a.Pigment: A mixture of metal oxides that can be melted at high temperatures

        b.Function:

        Color

    Hiding powder

    2) Glass enamel: the powder of glass enamel ;medium oil

        Frit: a mixture of silicon dioxide as a main component and melted at a high temperature

        Function:

        sintering performance,the combination of ink and glass

    3) Medium oil: A mixture of organic compounds

        Function: To provide printing performance on glass

6. The method of application

Spraying ; Roller printing ; Screen printing ; Curtain printing

    1) Spraying

        Advantage:

        a. suitable small scale production

        b. Can achieve a good printing thickness

        c. Ink and water miscible, water cleaning equipment

        d. Suitable for all sizes and shapes of glass

        Disadvantage:

        a. Excessive spraying produces contamination

        b. Excessive spraying results in loss

        c.  Low production efficiency (hand spray)

        d.  Labor intensity (hand spray)

        e.  Can not print pattern

    2) Roller printing

        Advantage:

        a. High production efficiency

        b. Can achieve high printing thickness

        c. Less contamination of the glass edge

        d. High yield

        e. Suitable for all sizes of glass

        f. Clean

        Disadvantage:

        a. Not suitable for small-scale production

        b. Can not print pattern

    3) Screen printing

        Advantage:

        a. Suitable for printing patterns and overprint

        b. Do not pollute the glass edges

        c. High yield

        d. Less ink consumption

        e. High production efficiency

        Disadvantage:

        a. Screen, making pattern costs

        b. Low printing thickness

        c. Not suitable for small-scale production

    4) Curtain printing

        Advantage:

        a. High production efficiency

        b. A high printing thickness is obtained

        c. Ink and water miscible, water cleaning equipment

        d. Suitable for all sizes and shapes of glass

        e.  Clean

        Disadvantage:

        a. Glass edge contamination

        b. There is a certain waste rate

        c. Not suitable for small-scale production

        d. Can not print pattern

7. Printing

    A. Printing instructions

        1) room temperature (20 ~ 23 ℃) storage ink to prevent precipitation;

        2) by adding medium oil, the use of low-speed mixer to adjust the viscosity;

        3) to maintain the standard temperature (21 ℃) measured viscosity;

        4) diluted, stirring the ink (suspension) standing 30min to eliminate the bubbles generated during mixing;

        5) The glass must be clean and dry, keep the same with the printing room temperature;

        6) to ensure that the glass is always printed on the same side (tin surface or non-tin surface) to avoid color;

        7) measuring the thickness of the printing to ensure that the thickness of the same, the thickness of the change may lead to changes in color;

        8) immediately after printing drying to prevent dust adhesion;

        9) For overprint, the glass must be returned to room temperature, and then the second color printing.

    B. Printing problems

8. Drying

    1) The method of drying: Infrared drying, UV curing (for automotive glass), hot India (flat cup, bottle)

    2) Purpose: A solid print layer was obtained before sintering and stored again.

    3) Parameters: wet film thickness, ink evaporation rate, drying speed, drying temperature.

    Recommendation: Immediately dry after printing to avoid sticking dust

    4) Meidum oil: solvents (such as pine oil, terpineol), polymers, additives (such as surfactants, flow agents, thixotropic agents)

    Note: For screen printing with varnish, can provide oil or water-based varnish