DE30075C - Process for the production of paintings on glass or glazed surfaces - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The present invention relates to a method to create paintings on glass, glazed ceramic products and similar objects with glazed surfaces, which have the character of real stained glass, d. H. those are where see-through Layers of color in connection with line contours and shading in black or to bring out the effect of the picture with a different dark tone.

I use gelatine or similar gelatinous masses of vegetable origin as a carrier for the colors or of animal origin, which only achieve the full effect of real, colored glass permit (but not oils and varnishes). The use of gelatin for manufacture . transparent paintings is known per se, it therefore extends my patent claim also not generally on the use of gelatine, but only on the particular methods that I use to manufacture it I devised paintings with the help of gelatine that were durable in direct sunlight. In my experiments in this direction I have found that the gelatine itself if, as has already been suggested, glycerine is added to it, no matter how brittle it is it remains that the layer of paint cracks and comes off as soon as the painting is exposed to the sun becomes, which is also the case with all paint colors. The usual ones also pass transparent colors under the direct influence of sunlight very soon. The attempts instead of gelatin e.g. B. to use collodion, failed because this Material cannot be mixed with permanent transparent colors. To now after To produce durable gelatin paintings in all directions, I subject the ones to be painted Surfaces of a special preparation, the gelatine take away its brittleness by the addition of Acetic acid and sugar, and cover the finished painting with a membrane of collodion, by adding OeI, e.g. B. castor oil, is made pliable. Only by this combined process has succeeded in producing really durable paintings in character the old, real glass paintings, which are used to decorate glass, ceramic Products and other glazed surfaces are used in the most varied of ways can be.

In the practice of this procedure, careful cleaning is the first thing to do of the surfaces to be painted. I use a solution of water glass for this, as a result of their action on the glass or the glazed surface, the color layer to be applied sticks better.

For the same purpose, I add a little acetic acid and sugar to the gelatine. The amount these additives depend on the colors to be used. The limits of additives are roughly as follows:

10 parts gelatin,

46 to 300 - water,

5 - 6 - concentrated acetic acid,

3 - 20 - sugar.

Of course, instead of concentrated acetic acid, you can also use dilute acetic acid or Take vinegar, with the addition of water

is to be reduced accordingly, such that the mixture has the composition given above receives.

The gelatin is dissolved in hot water, with acetic acid, sugar and the relevant Colors, so that a thick, gelatinous liquid arises, which I pass through Apply pouring or guf-like application with a brush onto the surfaces concerned. By these additions the gelatine loses its brittleness without its miscibility somehow enters with the dyes, or the pigments themselves suffer a detrimental change Experienced.

After drying, I cover the layers of paint with collodion, which makes it brittle and jumping ability is sufficiently impaired by the addition of castor oil. the The collodion layer increases the durability of the gelatin layer and protects it at the same time underlying gelatinous color layer against the damaging effects of moisture completely, without affecting the character of the pictorial effect. The line contours and shades are expediently produced before the layers of paint are applied; In the case of glass paintings, you can also use the back of the glass for this purpose.

I have ■ many of the stained glass made by this method on a trial basis Exposed for months to the influence of direct rays of the sun without the slightest Changes in the layers of paint or fading of the colors could be seen while . When using ordinary gelatine or gelatine mixed with glycerine, the layers peeled off after a few hours.

Claims (1)

Patent claim: The process of making paintings on glass or glazed surfaces by treatment of the surfaces with water glass, pouring on or gufsartiges application of the with sugar and Acetic acid added, artificially colored, gelatinous, translucent coating and coating the painting made in this way with collodion, that with OeI, z. B. castor oil is added.