التصوير بطريقة الأفرسكو (الألوان الجيرية) ٣_a ، كتاب تكنولوجيا التصوير د.م محمد حماد

Figure (31) modern faience mortar.

Dish it in a faience mortar (Fig. (31) a good dish to get fine atoms after the dish. Then the dish continues after adding a little lime butter to the mixture of water and color, in order to ensure the stability of the color and its overlap in the floor, but it is not right to overdo it in putting the good until The colors do not lose their vitality and become faded..because the white lime color affects the colors and their degrees, and gives them an effect similar to pastel colors if its quantity is increased in the mixture, and thus the colors lose their vitality and freshness that characterize the colors of the fresco.

Color palette:

Therefore, since the drying of the fresco painting does not take place completely until after about four weeks, the effect of the color gradations does not appear until after the expiration of this period. Next to the artist, there must be a palette to test the color, so that he can test the strength and transparency of the color on it, as it varies greatly before and after the color dries on the wall. And the experiment board is usually made of a sheet of cardboard covered with a layer of glue and painted with the color of shade (Tardumbr) to conduct experiments on it .. However, some contemporary artists tend to have the nature of the experiment board similar to the nature of the whiteness of the manes prepared on the wall for drawing on it .. Therefore, they prepare A panel of stretched mesh covered with mortar suitable for fresco, and this panel is equipped with a heating device or heater so that the color dries as soon as it is placed on it, and thus the artist sees the effect of the color on the experiment panel before placing it on the wall

Choosing and using paintbrushes:

When choosing paintbrushes, we must note that they have long handles, and are also suitable for fresco colors in that they are soft and of a round type with long hair (known as a pen) in order to absorb the color and not affect the surface of the mortar when rubbed.
Form (32) round brushes and other flat and conch brushes for polishing.

No matter how soft it is (Fig. 32). Likewise, wide brushes that resemble a palm are often used, and they are of great importance in the work and cannot be dispensed with (Fig. 32).

It is noted that the drawing always starts from top to bottom, and the brush is used

Always in one direction, in a fast, regular motion, without pressure.

Frills work after polishing:

After completing the coloring of the drawing every day, it must be polished by pressing the colored parts of the drawing lightly with a white conch to polish it and make it smooth and stable (Fig. 32). And if it is not possible for you to use the conch in the fine parts of the drawing, you can use the wide brush that resembles a palm after you dip it in fresh water and then pass it over the color lightly several times. Green and blue because water works to lighten pores and absorb colors. Finishing the polishing process, the excess mortar on the outer borders of the drawing must be removed so that work can be resumed the next day at the seams that are not exposed to view, as we have previously explained..and when

If the fresco painting dries after about three weeks, the artist can see its true final colors. And then the artist can also decide if there is a need to make some artistic touches or frills that he usually makes with the colors of the two colors, but these touches must be simple and in the narrowest limits because they are
They are superficial and do not go into the depth of whiteness, like the colors used in the fresco technique.. Because the colored materials are mixed with a little lime when preparing the colors with which to paint on the surface of the lime mortar before it dries, the colors overlap between the granules of the mortar whenever it dries, and unite with it And it becomes part of the coloring ground, which is mainly made of calcium carbonate, which is insoluble in water, and it gives the drawing many advantages.

Some painters tend to cover the drawing with a layer of wax after it has completely dried, especially if a lot of frills are applied to it - but this is not desirable as it changes the nature of the fresco colors, as the frills appear as strange spots on the drawings and reduce their splendor and clarity of the live, matte colors. And if what is meant is weather resistance, the fresco colors, by their nature, resist weather conditions such as heat and humidity, due to their porosity, which we should not lose by covering the surface of the color with a layer of wax.

General Notes :

What is usually followed in drawing frescoes is the direction from light to dark, as is the case in painting with watercolors (aquarelle). As well as confirming the surrounding lines at the end: the old method required showing the shadows first, then leaving the color to fix, then polishing the colored surface by breaking up the carbonate particles Calcium that forms the paint layer, then we apply another new layer of colors, and that the new layer mediates between the carbon dioxide gas in the atmosphere and the lime in the paint.. and in turn it does not turn into slurry except very slowly, and the shades of color are placed on the shadows, and placed directly on the areas that It will be painted with light colours..then it will focus on the parts to be strengthened or concentrated in the shadows..as for half the color and the lighter colors of the lights or the more vibrant colors come last.In this case it is possible without risk to mix the colors of the lights with lime in the mixture and the desired color.Often Photographers use a wet sponge, but it must be well squeezed to harmonize the colors or overlap them with each other to be more harmonious.

And that the artist who is able to do his work often prefers painting with the strongest colors in the almost finished work, but it is agreed that the artist’s work should be finished with the sponge before drying is finished. It always happens on the day after work that there is moisture that darkens the color before the final drying, and the moisture may appear in the form of spots.

One of the characteristics of the aforementioned frescoes is that building engineers and photographers see decorating some parts of the buildings with fresco drawings, although it requires a great effort to prepare it, and it also needs a lot of precautions, especially if it cannot be implemented in one day. On the next day .. Also, the colors that may remain after that cannot be kept