- Practical advice
- The preparation
- Realize the decor
- Cover with adhesive
- Draw and break paths
- Stamp along the tracks
- Cut out the decor
- Let dry
- Fill with slip
The mosaic makes it possible to compose sets all the more original that it associates all kinds of materials of recovery. For example, this rich and generous fresco evoking the journey.
Pebbles and woods require a very tight installation, piece by piece, to avoid the application of slip that would dirty their surface. Needed too, a double gluing wall / material.
Director M. Moulet
It is in the large common room of an old Gers barn converted into a lodging for hikers of the way of Saint-Jacques de Compostela, that a mosaic fresco is realized, summarizing this trip at the same time spiritual and tourist.
● Recovery materials and elements found in nature make up it. If the implementation requires patience and thoroughness, equipment side, glue and some tools are enough. The motive is above all a question of taste and imagination.
The mosaic accepts a variety of materials: remains of tiles, pottery, dishes, glass, mirror... Everything is exploitable! Nature is also an exceptional reservoir: stones, pebbles, wood, sand... The tesserae (small fragments) are either bought or obtained by breaking (using a cloth and a hammer). A Japanese clamp, or mosaic clamp, allows precise cuts. The glass is optionally resized with a glass cutter.
● Since it is impossible to make the fresco directly on the support, its design is first done "blank". The pattern is reproduced in real dimensions on kraft paper (1.50 x 1.50 m). The materials are then selected and placed - including gaps - which allows for all possible tests.
● Once the decor is finished, it is completely covered with tape. This technique makes it possible to block the fragments before the laying of a polyane film which, on the principle of the tracing, serves to take the imprint of the fresco: its contours as well as those of the parts that compose it are traced in the felt.
● The lines are stitched every inch. Then, the polyane film being applied to the wall, the reproduction of the patterns is effected, by stamping, using a "doll" (marker consisting of a gauze band containing red ocher pigment). The pattern appears dotted on the support wall.
A first part of the decor is cut with a cutter flush with the border. The rigidity due to the adhesive allows the selection of pieces of about 30 cm side. The wall is primed with a white glue for wall tiles (type Weber and Broutin, SBMercier...), previously spread with a knife and striated with a toothed spatula.
● As the decorative part is applied, it is essential to ensure the adherence and flatness of each element. If the glue rises through the joints, simply crack the adhesive to remove the excess. Each of the parts is in turn cut and placed in coherence with the motive of the fresco.
● After 72 hours, the adhesive is removed. A rather thick light gray slip is applied, cement mix to joint - two volumes white for a gray - (Weber and Broutin, SBMercier). A squeegee (from a wiper blade), flexible and manageable, simplifies its distribution. A dry, soft cloth (not to dig the joints), cleans, smoothes and polishes the finish.
Realize the decor
Place the blank materials on the "boss" in craft paper. Make sure that the days between tesserae do not exceed 1cm. Hammer and Japanese pliers allow to fit the cuts.
Cover with adhesive
Once the decoration is done, cover it with several layers of transparent adhesive. Work by color or material area to simplify your task. Check the adhesion of each tile.
Draw and break paths
Cover the assembly with the polyane film. Carefully trace, in indelible felt, the recesses, changes of materials and the specific embedding of the decor. Then, using a 3mm tip, drill the lines every centimeter.
Stamp along the tracks
Apply the film to the wall, then dab the "doll" along the lines. Check that the pigment passes through the drilled holes in the polyane. This one removed, the different parts of the fresco are drawn in dotted lines on the wall.
Cut out the decor
Cut out each part of the decor with a very fine cutter, following the edges of the border tesserae as closely as possible. Be very specific, the subsequent work will be simplified. After pasting the wall, apply the "piece" of decor.
To remove tile adhesive between tesserae, carefully cut the adhesive at the joints. Then remove the excess with a knife. Also clean the borders of the pattern.
Allow the fresco to dry for at least 72 hours before removing the adhesive from the tesserae. Proceed gently. If the previous work has been carefully done, no tesserae should come off the support.
Fill with slip
Using a large spoon, fill the joints with a thick, light gray slip: wait fifteen minutes before scraping with a soft squeegee. Smooth with a soft cloth.