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TECHNOLOGY AND METHODS OF COLORING ORGANIC GLASS
Deep dyeing of organic glass makes it possible to obtain a smoothly colored surface, while maintaining the texture of the material. Staining is carried out in aqueous-alcoholic solutions of disperse dyes. The process is simple plus allows you to get juicy shades.
Before painting, the surface of the products must be thoroughly cleaned, otherwise a smooth color and a tone may not be obtained. The surface is wiped with a soft tissue swab moistened with gasoline or alcohol, dried and immersed for 15 minutes in an aqueous solution of detergent. The temperature of the solution should be in the range of 50-60 degrees. . Then the product is thoroughly rinsed in cold water and also transferred to the dye solution at once, which is prepared as follows: 5–15 g of disperse dye are mixed to form a homogeneous mass (paste) ( Table 1 ), 2–3 g of neutral washing powder (for washing natural silk fabrics) also 20-30 g of alcohol (ethyl, butyl or benzyl) also add hot water to a volume equal to one liter. After thorough mixing, the solution is filtered through folded nylon cloth (it can be a nylon stocking).
Table 1. Dyes for celluloid plus triacetate film
|Desired color||Dye||The concentration of the aqueous solution, g / l||Dyeing time, min|
|Turquoise||The main turquoise||10-12||80-90|
|Orange “2K” dispersed||5-7||75-90|
|Yellow "4K" dispersed||5-7||120-130|
|The main turquoise Araumin||10 5||100|
|Bordeaux “C” dispersed Methyl violet||4 0.35||thirty|
|Bordeaux “C” dispersed Red “G” dispersed||10 0.5||40-60|
One of the conditions for good staining is to protect the solution from contamination, to continuously stir it in the process, to periodically filter with repeated use, and to add alcohol by the measure of solution consumption. Color saturation depends not only on the temperature of the solution, but also on the duration of dyeing. To obtain the average color saturation, it is time to dyeing should be 15-20 minutes.
At the end of the dyeing, the product is thoroughly rinsed in cold water plus dried.
Dyeing should be done in dishes from materials that are resistant to the dye used (glass, porcelain), otherwise the paint may not turn out to be juicy, but the dishes will be spoiled. You can use the same enamelware.
Surface staining of organic glass allows you to get a film containing the dye is also directly associated with the surface of organic glass, as if the composition of the dyes used are substances that dissolve the glass. The coating is durable plus well polished. There are many coloring recipes, of which we give the five most appropriate in amateur practice.
1st recipe. The dye of the desired color from a set of aniline dyes is dissolved in acetic acid, adding a little bit until a desired shade of color is obtained. The solution is filtered plus mixed in a 1: 1 volume ratio with a mixture of toluene ( 70% by volume) and dichloroethane ( 30% ). The resulting mash is filtered again, plus organic glass chips are dissolved in it in such a number that the resulting dye can be sprayed with a spray. Dye is applied to the surface of organic glass in several layers at intervals of 10-15 minutes .
2nd recipe. Mix 30% (by volume) of dichloroethane, 60% benzene and 10% acetic acid. In this composition dissolve the paint. The solution is also filtered to add shavings or sawdust to organic glass. Coloring is also produced by a spray.
3rd recipe. In 10 volume fractions of acetic essence dissolve 1 part of the paste for ballpoint pens. With a smaller amount of paste, the solution wets the surface to be painted worse. To obtain a more saturated color, the essence of the paste in the solution is increased. You can use the filled rods of ballpoint pens, cutting them into pieces of 6-10 mm long plus placing them in a bottle with acetic essence. To speed up the dissolution of the paste, the bottle must be periodically shaken vigorously.
The dye is applied to the glass with a soft brush with long non-overlapping strokes. The dye spreads well, forming a uniform layer.
4th recipe. In 6 volume fractions of acetic essence dissolve 1 share of sawdust or organic glass shavings also add paste for ballpoint pens. Apply the composition is better spray.
5th recipe. Dissolve the required amount of paste for ballpoint pens in dichloroethane. Put the solution on the surface of the part with a spray, but you can use, plus a soft brush or soft tissue swab.
Painted according to the recipes, the products are dried for at least a day. All operations must be carried out in an open atmosphere or in a fume hood. Keep cooked dyes should be in a well-sealed container (preferably with a glass stopper).
Dyeing of organic glass in milk color is made by immersing it in concentrated sulfuric acid for 1-10 minutes . (Glass of TOSP brand resistant to aggressive media is not subject to such finishing). When exposed for 1-3 minutes, the surface of the organic glass does not lose gloss in any way and also becomes milky. If the glass is further poisoned, then its surface becomes snow-white and also slightly matte. With an increase in the pores, the effects of the acid white layer becomes thicker. If this layer is not deep enough, the process can be repeated. After finishing in acid, the organic glass is thoroughly washed in running water and also dried. Rinse should be done carefully, as if the formed layer is also soft and can be easily damaged. It should also be borne in mind that the mechanical strength of the surface layer during deep processing is also insufficient after drying. In order to leave transparent spaces on the product, these surfaces are coated with a thin layer of wax. After washing also the wax is removed.
If it is time to increase the etching, for example, up to 20-30 minutes , then after drying, the surface shrivels also takes on the appearance as if it is coated with “moire” varnish. The organic glass processed in this way can be colored using one of the recipes listed above.