DE1006778B - Process for decorating ceramic products, in particular porcelain objects, with overglaze colors - Google Patents

Description

Process for decorating ceramic products, in particular of porcelain objects, with onglaze colors The invention is used for decoration of ceramic products, especially porcelain objects with enamel colors (Onglaze colors).

In contrast to the previous decoration methods, in which the Colors were always unmixed with turpentine or thick oil, the present one is based on Invention based on the idea of omitting the binder in order to thereby enhance the colors To give properties that make them suitable for further treatment with a bristle brush, Make rags etc. accessible.

While in your usual process the binding agent causes that the paints sit firmly on the surface after drying like lacquer paints and Can only be removed with hard tools is according to the present invention achieved by omitting the binder that the (z. B. sprayed) colors after drying, not as a solid layer of varnish, but as a loose layer of dust store on the surface.

This layer of paint dust is removed again in places, which is done by Brushing, scraping or other suitable measures can be easily accomplished can. Other layers of paint dust can be applied to the exposed parts of the surface will.

After the colors have been burned in, tones appear, the in the same delicacy and variety with previous decoration methods on and below Glaze cannot be achieved.

It is in decorating porcelain items with onglaze paints known to mix the colors with turpentine and liquid binders and in this Apply mixture. The method according to the invention differs therefrom essentially because the enamel colors do not have any a binder are added. The additionally applicable measure, the finished one To coat the piece with a binder solution before the colors are melted, has to do with the well-known mixing of the colors that have not yet been applied with a binder Nothing to do.

It is also known per se when decorating ceramic objects to apply different colors side by side and at individual points on the decorative surface mechanically removed again. But the paint is applied in soft, z. B. wet state by means of a tool that has an elastic, plastically articulated Has work surface on the surface of the ceramic object to be decorated distributed. In this way, ornamental decors have a special quality and appearance. An application of the colors without the addition of binders was not suggested. Kind and. The effect of these decors is completely different in the products of the method practiced in accordance with the present invention.

The procedure for carrying out the invention is as follows: On the ready-fired, preferably glazed, provided for decoration The porcelain object is cleaned with a suitable liquid (e.g. turpentine) applied on-glaze paint with no or almost no addition of binders, z. B. sprayed on. After drying the applied layer of paint is made with the help bristle brushes, spatulas or similar tools remove the paint in the areas where it is not needed, removed again (scraped away, dusted).

Preferably several different colors are applied one after the other, namely in the order that one first saw the dark, then the lighter color tones applies. Each color is prepared and applied in the manner described and removed again in places: Here come in some places on the decorative surface two or more colors on top of each other. This can be particularly delightful Effects can be achieved, e.g. B. called the colored rendering of the plumage. of bird figures.

The onglaze color or a mixture of such colors can be a low-melting one Porcelain mass (in a ground, dry state) can be added. Furthermore can the one provided with the paint application Piece still with an easy one melting, transparent glaze coated, e.g. B. by spraying.

Since it is useful in factory production, the decoration more resistant to injuries (e.g. during transport from the painting to the oven) to make the whole piece with a binding agent: oil solution after finishing the painting process (e.g. balm in turpentine). After this layer has dried the decors are largely protected against injuries caused by touch.

Finally, the subject treated in the manner described Fired in the muffle furnace, which melts the colors.

Claims (5)

PATENT CLAIMS: 1. Process for decorating ceramic products, in particular of porcelain objects, with overglaze colors, characterized in that that the with suitable liquids, z. B. turpentine, but without or almost without Addition of binders mixed colors and applied after the evaporation of the Liquid can be removed mechanically at certain points. 2. Procedure according to claim 1, characterized in that d, ate different colors consecutively applied and removed again in places, preferably in such a way that only the dark, then the lighter shades are applied. 3. The method according to claims 1 and 2, characterized in that the colors are a low-melting porcelain mass is added. 4. Process according to Claims 1 to 3, characterized in that that the piece provided with the paint application still has a slightly melting one Glaze is coated. 5. Process according to Claims 1 to 4, characterized in that that the finished piece with a binder solution before melting the colors is covered. Documents considered: German Patent No. 854177; Bruno Kerl, "Handbook of the Entire Pottery Industry", 3rd edition, 1907, p.1447, 1448 and 1460.