Instructions for the use of Stucco Marmorino
How to use Stucco Marmorino
Stucco Marmorino can be applied directly to lime-cement, gypsum-cement plaster and similar mineral substrates. On plasterboard, MDF, glass, galvanized sheet metal and surfaces painted with dispersion paint, prime once with the adhesive primer. For the clay plaster, a lime slurry should be rubbed in or additives such as marble or lime grit are already mixed into the clay plaster
Mix the lime plaster well and add water if necessary (up to 0.25 l./20 kg). Apply with an INOX smoothing trowel without pressure. Small trowel strokes are permitted; they are scraped off later. This is better than to compact too much already now. The layer must cover the substrate, but should not be much more than the grain thickness, i.e. approx. 0.3 mm. This base coat now needs 12 hours drying time. If your aim is to make a coloured coating, you can now prepare the coloured dough. How to prepare the dough you can read in a manual. Click here.
Now colour the putty with the coloured dough and trowel it on with a Venetian smoothing trowel using little material and moderate pressure. Allow to dry a little and smooth and press with increasing pressure and without material. The resulting lime slurry is compacted to a silky matt surface. Work forward piece by piece and do not coat the entire wall at once. If the surface draws unevenly or has already dried too much, you can use a spray bottle to moisten the surface sparingly with water to smooth it better.
After a drying time of 1-2 days (depending on humidity and temperature) the surface can be sealed with Punic Wax or Beeswax Balsam and polished with a Venetian trowel or a microfibre cloth. If it is an outdoor area, Venetian soap is applied to protect the surface from acid rainwater and to increase shine. After a drying time of 24 – 36 hours (depending on humidity and temperature), the surface can be sealed with Punic Wax or Beeswax Balm and polished to a shine with the Venetian Trowel or a microfibre cloth. If it is an outdoor area, Venetian soap is applied to protect the surface from acid rain water and to increase the gloss.
With Punic wax pearlescent silver, the surface shimmers in rainbow colours. A surface dyed with iron oxide yellow and refined with Punic Wax gold comes close to a gilded surface. Ochre Havane and Punic Wax copper or Punic Wax bronze as well as Chrome Oxide Green with Punic Wax silver flitter is also very good. Advantageously one tries some out, in order to come to an individual result.
Dry colours and color paints
Up to 10 % pigments (by weight) can be stirred into the putty. The lime cannot bind more and chalking would occur. If the dry paints, also called pigments, are stirred into the putty, a beautiful coloured mass is created. However, there is a high probability that pigment spots will appear. This means that some pigments leave traces in the form of drivers and dots when the compound is applied. This does not necessarily have to be a disadvantage; it can also be seen as a nice side effect. But if you want to avoid these pigment spots, mix yourself with a coloured dough. This is how it works: For 1000 g of pigments, approx. 800 ml of liquid are used (160 ml wetting agent and 640 ml water). Pour the liquids into a container and add the pigments, stir well and grate; crush lumps at the edge of the container. Use a spoon, spatula or other. It is best to make a note of your recipe so that you can restore the same shade. Let this dough soak for at least 3 hours. However, the coloured dough can also remain overnight without any problems. During this time the container should be covered. Afterwards mix the coloured dough into the putty and stir well. The best mixing result is achieved if the contents are emptied into a separate bucket and mixed again well with a mixer. The putty is then immediately ready for use. Pigments have the highest colour intensity and set no limits to your creativity. However, you should only use lime-tolerant pigments. The fillers, whether dyed or in natural white, can be stored for many years if stored correctly. For this purpose, the putty must be covered with a foil and the container sealed tightly. Exception: Ultramarine blue must always be applied on the same day and cannot be stored. Tip: If chrome oxide green, cobalt blue, titanium white or similar hard pigments are processed, a Venetian PVC smoothing trowel is used for compacting. If you compact with a steel spatula, the pigments grind off the steel and metal abrasion marks are the result as grey stripes and stains.
Wax Coating and Venetian Soap
The transparent Punic wax or beeswax balm is applied very thinly with a Venetian smoothing trowel. The wax layer must be very thin. After a flash-off time of 1 – 2 hours you can polish with a microfibre cloth. A polishing machine can also be used for large surfaces. Two to three coatings make the wall almost waterproof and the coating still remains open to diffusion. The intermediate drying time between the coatings should amount to 30 – 60 minutes with the punischen wax and up to 8 hours with the beeswax balm. Venetian soap is used in exterior and wet areas. Leave the last application of Stucco Veneziano or Marmorino to dry for 2 hours and then apply the Venetian soap with a Venetian smoothing trowel and remove the excess. Lime soap is produced on the fresh lime. This thin layer makes the coating water-repellent and thus protects against acid rain, which would otherwise transform the lime into plaster and destroy it. Polishing is done with a trowel or a microfibre cloth.
Marmorino is a natural white putty to be used for decorative wall design. Due to its high alkalinity, it is resistant to moulds. Highly vapour permeable.
Ingredients: Marble lime [Ca(OH)²], marble powder [CaCO³], water, cellulose, linseed oil.
Yield: approx. 800g/m² per layer depending on substrate preparation
Specific weight: Approx. 1.37 kg/l
Ph value: 12,5
Storage conditions: Frost-free and in closed containers, covered with a PVC film and a layer of water, durable for many years.
Safety instructions: R36/38: Irritating to eyes and skin.