DE1771219B1 - PROCESS FOR CREATING MULTI-COLORED EFFECTS ON ANODICALLY OXIDIZED ALUMINUM SURFACES BY CHEMICAL TREATMENT - Google Patents

Description

Dyes for coloring, soft under the influence of aggressive liquids into various Colors that differ from the basic color are skipped.

2. Aggressive fluids in such a range, to such an extent and in such a way in such a way that neither the basic color is completely destroyed nor the oxide layers attacked but the color of the basic color is changed.

the end-

The selection of the per se known dyes and treatment liquids used according to the invention is in the area of the technical ability of an expert.

The new process is carried out as follows: Finally, by etching away or removing anodic weaknesses in the usual way the basic color of oxidized aluminum dation of the aluminum surfaces to be treated surfaces with the creation of sharper contrasts and their uniform coloring with dyes Patterns. or suitable dye mixtures in the ge

The desired tint underlying the present invention, which is the basic tint for the The task consists in the development of a process rens, according to which in a single operation suitable reactive for the respective case on oxidized and uniquely colored aluminum-aqueous liquid, e.g. B. aqueous acids, such as Surfaces decorative multicolored effects that do not contain sulfuric or nitric acid, or alkaline lyes

or aqueous solutions of oxidizing agents such as potassium permanganate. Used for this application it is preferable to use atomizing devices that have an appropriate distribution the areas of the pretreated surfaces intended for wetting of the aggressive liquids enable.

The essential feature of the invention in carrying out the spraying is the irregularity to be determined in the distribution. The acting person does not follow a specific one Regularity or method, neither in the sequence nor in the extent of the sprayed Surface, rather it carries out the application in any way: it treats certain ones arbitrarily Surfaces and leaves out others. If areas are left out of the treatment, they result since they are surrounded by treated surfaces, countless varied artistic gradations of Tints, whereby the spray is wholly or partially superimposed in certain areas. In the end bring the atomizer close to the surface and move it back and forth or hold it at a greater distance from it in order to achieve a greater or lesser intensity in the density. The measures specified ensure that the reaction of the attacking liquid with the original color of the oxidized surfaces a variety of shades in all Shades and effects in all possible planar expansions and designs.

When the acting person considers the etching to have ended, he dips the treated aluminum objects in water to stop the aggressive effects of the liquids applied. It there is then nothing more to do than the resulting color tones with the help of familiar ones Fix means and methods.

The simplicity of the process and its rapid feasibility allow the treatment of anodic oxidized and evenly colored aluminum surfaces of moldings of any size and shape.

Thanks to the unusual way in which the new procedure is carried out, it can be modified numerous. Not only can any type of aluminum body be oxidized in any way and treat stained surfaces, but perform this process with a whole Range of dyes and their combinations with various tints, with for each individual In the event of suitable aggressive chemical compounds, with application devices, which are from simplest - such as B. the brushstroke - go to the most perfect atomizer, and also by people who only have a more or less rudimentarily developed artistic feeling to need.

Claims (1)

Claim: lei have sharply delimited color contrasts, would be available. The inventive method is characterized in that the colored aluminum-5 surfaces in an irregular manner in the absence of stencils or patterned covers with liquids, which act as the substances changing the colorants, corresponding acids, alkalis or Containing oxidizing agents, treated in such a way that Process for creating multicolored effects
on anodically oxidized aluminum surfaces uniformly colored with dyes
Applying, preferably spraying, of the
Oxide layer does not attack, but the color changes liquids, thereby
characterized in that the colored io patterns are created in a wide variety of colors and shades that merge into one another over aluminum surfaces in an irregular manner, in the absence of stencils or patterns. Moderate covers with liquids, which manure is readily apparent from the large Unterais The substances that change the color made a decision between the new and the familiar promises Acids, alkalis or oxidation processes, which may be necessary in some cases: not Contain agents, treated in such a way that patterns in the most varied, merging into one another Colors and shades are created. only covers to protect certain surface areas from the corrosive liquid, but rather also the mentioned aids for the high-contrast Gradation of the colors, as well as the repeated coloring by re-dipping in the dye liquor organic or inorganic dyes or the Use of special colored pencils, in all cases too sharp from an aesthetic point of view The invention relates to a method for creating delimitations that are far removed from multicolored effects on anodically oxidized and 25 multicolored, merging effects, uniformly with dyes in the desired shade as they are with the process of the present invention colored aluminum surfaces. dung that evoke any kind of color shade It is known that the generation of high-contrast can be achieved. Black and white patterns on aluminum surfaces, the most important characteristic of the present invention by treating them with chromic acid 30 there is that multicolored effect through provided with a black oxide layer and the latter a single coloring and a single post-treatment can be achieved with corrosive liquid. In the method according to the present invention, the previously known aggressive effects only represents the starting point, which was further developed according to the invention, - namely due to the surprising task, starting from a single basic coloring, with the help of an known aggressive liquids multicolored then etch away with inorganic strong acids or alkalis down to the bare metal according to the pattern; colored contrasts cannot be achieved with this method. Another process also uses anodically produced and colored oxide layers on aluminum surfaces by means of alkalis using stencils and spray guns or with patterns th calenders in places or only partially to produce effects. The solution to the set up wisely etched away to produce sharply delimited patterns; z. B. is obtained by doing this on a blue basic color light blue tinted pattern. According to this process, however, only the basic color can be decolorized according to the pattern or in its hue be weakened; however, no different color can be produced; is of particular disadvantage naturally the simultaneous etching away of the oxide layer. It is also known, colored, oxidized aluminum surfaces by means of inorganic acids while preserving the oxide layer, completely discolored in places according to the pattern or only closed in color change, whereby to achieve different colored patterns at least once the treated Re-coloring surfaces with a different dye and thus additional measures must apply. The previous procedures are based accordingly would exist
applies: essentially in the fact that one