Marble Carrara white 000

White marble from Carrara, granulometry 000 (0,0 - 0,5 mm). Suited, for example, as ingredient for plaster and primers, filler for resins, thickener, etc.

Marble ebony black MK000

Italian black marble, granulometry MK000 (0,0 - 0,7 mm). Suited, for example, as ingredient for plaster and primers, filler for resins, thickener, etc.

Marble alps green MK000

Italian alps green marble, granulometry MK000 (0,0 - 0,7 mm). Suited, for example, as ingredient for plaster and primers, filler for resins, thickener, etc.

Marble Carrara white 407

White marble from Carrara, granulometry 407 (0,4 - 0,7 mm). Suited, for example, as ingredient for plaster and primers, filler for resins, thickener, etc.

Marble Carrara white 00

White marble from Carrara, granulometry 00 (0,7 - 1,2 mm). Suited, for example, as ingredient for plaster and primers, filler for resins, thickener, etc.

Marble Carrara white 0

White marble from Carrara, granulometry 0 (1,2 - 1,8 mm). Suited, for example, as ingredient for plaster and primers, filler for resins, thickener, etc.

Marble Mori yellow MK000

Italian yellow marble from the town of Mori, granulometry MK000 (0,0 - 0,7 mm). Suited, for example, as ingredient for plaster and primers, filler for resins, thickener, etc.

Marble Verona red MK000

Italian Verona red marble, granulometry MK000 (0,0 - 0,7 mm). Suited, for example, as ingredient for plaster and primers, filler for resins, thickener, etc.

Talcum fine powder

Finely ground talc, grain size 325 mesh. Talc is the softest material on the Mohs scale of hardness.

Talcum powder can be used for various applications:

• Due to its very low shear strength talcum is widely used as a solid lubricant.
• Talcum powder is used as filler for resins.
• Talcum is also a very good absorbing material and useful for removal of oil stains, bad smells, etc.
• Talcum powder is useful as a release agent in molding using materials such as latex, silicone, rubber.
• In some sports talcum is used to dry hands (artistic gymnastics, american football).
• Talcum is very useful as care product for rubber, silicone and latex objects, just place the objects in an air-tight container or bag and add some talcum. It will prevent the objects from sticking together. It is often used in latex gloves.
• In paint and varnish manufacturing talcum is widely used, as well as in pencil and soap manufacturing.

Synthetic iron oxide medium yellow - 25 kg

Synthetic iron oxide, medium yellow, specially suited for colouring of cement, concrete, asphalt, screed, bricks, mortar and plaster, and for the production of abrasives. Sold in 25 kg bags.

Excellent quality, made in Italy.

Specifications:

Concrete pigmentation

Iron oxides are water-insoluble pigments with a good alkali fastness and excellent light fastness. Considering these characteristics and their low price, they are considered the best pigments for concrete pigmentation. The quantity of pigment used varies usually from 3 % to 5 % of the weight of the cement since inerts do not take part in the pigmentation. A maximum limit of 7 % can be reached if a more intense colour is required without affecting the mechanical resistance of the finished product. In order to obtain the best final colouring it is preferable to mix the components in the following sequence: first of all inerts, then pigments and finally cement and water.

Variation of colour shade in time

When preparing coloured concrete it is extremely important to pay attention to the water/cement ratio of the mixture, ratio that affects the shade of colour. A brighter coloured finished product is obtained increasing the quantity of water but at the same time the mechanical resistaince and weather fastness is reduced. However in time the superficial layer of the finished products is subject to wear down which enhances the colour of the inert, consequently there is a change in the shade of colour independently from the pigments used.

Efflorescence

It is a physical-chemical phenomenon produced by the calcium hydrate which is in the cement and is water-soluble. It can occur during the drying process but also later when humidity occurs. In fact the calcium hydrate tends to migrate towards the surface of the finished product and, reacting with the carbon dioxide in the air, forms white patches of calcium carbonate which are more visible in darker colours. Iron oxides are insoluble in water and do not affect the above mentioned phenomenon, which can be reduced with the use of specific additives.The quality of the pigment, the right dosage of the components, the valid production technology and the use of additives are the basis of the best result in time of a coloured concrete finished product.