DE1080444B - Decals for ceramic goods - Google Patents

Description

Decals for Ceramic Goods In the ceramic industry as well in the glass industry are used for mass decoration of porcelain, earthenware and glasses Ceramic decals used in which the ceramic paint flows using suitable binding agent printed on paper with special preparation, coated, be doctored or poured. Such papers are generally of two types manufactured: 1. as so-called hide paper. In this case, one with gum arabic is used coated paper (metapaper) with a skin made from collodion or other cellulose derivatives coated, and on this skin the ceramic sludge flow is either on one Varnish preprinted with powder or after rubbing with an organic binder applied in print.

2. The second possibility is that you can see the colors directly on the special paper prepared with gum arabic, whereby again the It is possible to powder the silicate flows onto a varnish print or under Use a suitable binder to apply in print. The finished color print is in this case with a lacquer mask (lacquer coating) made of a film-forming material covered, so-called sliding pictures.

In both cases the film can be made with the ceramic silicate flux After moistening the paper prepared with gum arabic, peel it off and place it on it Art transfer the colors onto the broken glass to be decorated. You can use the ceramic Print even without a varnish mask using a peelable varnish from the metapaper transfer the broken glass. Finally, there is the option of having skin paper printed with a ceramic color flow and a lacquer mask over this color flow lays.

The following is a schematic list of the various options outlined above, from which it can be seen the order in which the individual lacquer and silicate flow layers are arranged on a paper or carrier material. A double line denotes the point at which the silicate flux or film is pulled off the paper after the paper has been moistened. The side with which the peeled fihn is transferred to the shard is marked by an arrow. When the body is fired, the organic binders and the film are destroyed and, at the end of the firing process, only the ceramic color flow remains on the body in the form of the applied decoration. Instead of paper, other auxiliary carriers can also be used.

It is already known that cellulose acetate is used as a film former and solutions of nitro or ethyl cellulose with various plasticizers as binders use.

It has now been shown that the most common plasticizers and Binder, especially nitrocellulose, when baking the ceramic paint printed film material in the ceramic flow result in pores and cracks or how this is the case with some plasticizers, leaving discolouring combustion residues. This inconvenience is particularly evident when you go down a thick river on the Wants to bring up broken pieces, z. B. at a river that a Contains colored decor that protects against mechanical influences and against the Attack of the detergent still coated with a colorless, transparent flow of silicate became. In this case the thickness of the entire baked material is double up to three times as strong as when applying a simple flow of paint. Step here the phenomena of cracking and pore formation are particularly pronounced. This Illness is referred to as the "boiling up" of the flow of paint.

It has now been found that this boiling of the paint flow can be avoided leaves when using the decals of the invention. These consist of a substrate with a water-soluble separating layer, such as paper or textiles, on which one with ceramic colors or enamels and film-forming polymers or copolymers of acrylic acid esters or methacrylic acid esters as binders for this purpose, the film is made of the same polymer, with the ceramic Color flow can be outside or inside. Does the material have one after external color flow, this can still be covered with a polymer coating or copolymers of acrylic acid esters or methacrylic acid esters coated be. These abovementioned plastics depolymerize when heated, and the monomeric ones The products then evaporate without the described disadvantage of boiling to cause and without leaving any residue. So there is a perfect closed, pore-free and crack-free silicate flow. These plastics own furthermore the advantage that they can be used for the intended process without the addition of plasticizers, which partly provide hardening residues and also cause boiling, can apply as they need more or depending on the degree of polymerization can be adjusted to be less soft. Example of a color flow 100 kg selenium red silicate flow are made into a paste with 30 kg of a polymethacrylate; that beforehand in a solvent mixture dissolved from 80 kg of butyl acetate, 15 kg of cyclohexanol acetate and 5 kg of butyl glycolate became. The mixture is applied to metapaper by screen printing.

Example of making a film on a with gum arabic The following solution is poured onto pre-coated paper in a film pouring machine: 20 kg polymethacrylic acid ester, 60 kg butyl acetate, 15 kg ethyl acetate, 5 kg diacetone alcohol, or the film is screen-printed as a lacquer mask using the following Solution: 50 kg polyacrylic acid ester; 40 kg butyl acetate, 8 kg methoxybutyl acetate, 2 kg of diacetone alcohol.

Claims (2)

PATENT CLAIMS: 1. Decals for ceramic goods, consisting of a substrate such as paper or textiles with a water-soluble separating layer on which there is a film of the The same polymer is located, wherein the ceramic color flow can be on the outside or inside. 2. Forming the decals according to claim 1, characterized in that the material is located on the outside ceramic paint flow thereon a coating from those mentioned in claim 1 Contains polymers. References contemplated: United States Patent Specification No. 2,629,679; Patent No. 1897 of the Office for Invention and Patents in the Soviet occupation zone of Germany.