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Newsletter 08-2020

Kremer Pigmente

Lime White

Lime has become more and more popular over the last years. Once considered as a rather trifling historic building material it now is more and more in use again mainly due to its excellent physical properties.

Lime was already used in architecture in Roman times. The excellent selection of building materials in the Rome area made it possible to build very durable structures. The so-called Roman mortar consists of a mixture of Pit Lime (#31800) and Pozzuolana Red Earth (#31230). The sump lime is burned with wood and then soaked in for several years.


Whiting / Limewash

Lime paints and washes are suitable for the following surfaces: lime plaster, lime-cement plaster, cement plaster, brick masonry, clay plaster, and natural stone. Lime paints and washes are not suitable for gypsum, dispersion paints and similar surfaces. For exterior application one should avoid wind and direct sun exposure. Humid and windless weather conditions will help the lime bind. It will then slowly react with the carbon dioxide in the air.

Pre-wetting the plaster is necessary prior to the application of the limewash. You can also apply the limewash to fresh, new lime plaster, once the plaster has suffciently cured.

Dilute the Pit Lime (#31800) with 3 parts of water, and apply the solution thinly with a tassel or a wide brush. The limewash coat must be fully dry in order to become completely opaque. Usually, 3 coats are necessary, but 5 coats are even better. The rate of consumption depends on the roughness of the surface and will be around 100–150 ml/m² per coat.

Always whiten/limewash the wall in its entirety in order to avoid visible lines and edges. Limewash will never be completely abrasion resistant, but you can enhance its abrasion resistance by adding 2–5% of Casein Binding Medium (#63210) to the Pit Lime (in this case the lime has to be used immediately).

You can color the limewash by adding up to 5 % lime-stable pigments. Pigments should be soaked in water one day prior to their use in limewash. The final color hue is visible once the limewash is completely dry, so pretests on a small area prior to application are recommended. Lime is very alkaline and caustic – always wear eye protection, gloves, and a dust mask!

 

Bismuth-Vanadate Yellow

These pigments are mixed crystals of the bismuth-vanadium-oxide system. Bismuth-Vanadate Yellow can be used as wall paint or for art painting. It is suitable for all binders and is weather resistant. Due to the fineness of the pigment particles, this pigment has good glazing properties. The lightfastness is excellent, regardless of dilution or mixing with other pigments.


#43910 Bismuth-Vanadate Yellow, lemon

#43915 Bismuth-Vanadate Yellow, light

#43918 Bismuth-Vanadate Yellow, medium

#43920 Bismuth-Vanadate Yellow, dark

The Bismuth-Vanadate Yellow range is supplemented by the following ready-to-use colors:

#27160 Color Paste - Bismuth-Vanadate Yellow

#439158 Watercolor - Bismuth-Vanadate Yellow, light
#439188 Watercolor - Bismuth-Vanadate Yellow, medium
#439208 Watercolor - Bismuth-Vanadate Yellow, dark

#4391592 Retouching - Bismuth Vanadate Yellow, light


Marseille Soap

Marseille soap was first produced in Marseille during the 17th century. Until today its recipe has not changed. Tree oils, mainly olive oil, are used to boil this pure vegetable soap. It contains 70 % olive oil and 30 % coconut oil and is without artificial surfactants, preservatives or the like (biodegradable according to OECD 301D). The soap is very rich and economical. Marseille soap (also called Venetian soap) is a neutral soap and is also used as an additive to bole for stucco lustro and polishing white.

Wide range of applications:

For cleaning brushes when using aqueous binders or oil paints. The Marseille soap has a slightly refatting effect and cares for natural hair and bristles. Dissolve 4-5 tablespoons of Marseille soap in 1 liter of hot water and thoroughly wash oil-contaminated brushes and rollers with the soap solution. Dried, oil-soiled tools can usually be cleaned by boiling them briefly in the soap solution.

For hand cleaning, dissolve 10 tablespoons of Marseille soap in 1 liter of hot water and let it cool down. A jelly-like mass is formed. Wash oil-smeared hands with the soap gel as with commercial liquid soap. For stubborn stains, it is recommended to add some marble grit as scrubbing additive.

For cleaning all types of smooth floors, especially linoleum, waxed cork, wood and tile flooring. Dissolve 1-2 tablespoons of Marseille soap in approx. 8 liters of warm water and clean the floor as usual with a scrubbing brush and mop.

For soaping floors: In some areas of Germany it is common to treat softwood floors and tables by simply "soaping" them. The wood surfaces are thereby protected against soiling, the light-colored wood character is preserved as far as possible (woods containing tanning agents, e.g. oak can react with dark discoloration). Dissolve approx. 20 g Marseilles soap in 1 liter of boiling water. Apply this hot soap solution immediately to the untreated wood floor with a suitable brush, or work it in with a scrubbing brush and leave to dry. Repeat the process if necessary until the desired result is achieved. Repeat the soap application from time to time depending on wear and tear to ensure sufficient protection for the wood. It is advisable to prepare test areas to assess the result before working on large areas.

#78045 Marseille Soap in cubes

#78046 Marseille Soap in bucket

#78050 Marseille Soap in needles

 

C-Bond Glass Strengthener - Silanol based

C-Bond is a NanoShield and strengthens a variation of glass. It increases the flexibility of glass and repairs imperfections such as micro-cracks. C-Bond is designed to target and covalently bond inside microscopic defects. Significantly increasing the strength and function of the glass unit.

How to apply C-Bond Glass Strengthener
Clean very dirty glass with ethanol, normally with demi-water. Dry the surface with a cloth or compressed air. Apply C-Bond Glass Strengthener by spraying, a brush or by immersion of the object. Remove the residue after 1 minute with a slightly moistened microfiber for glass, or with compressed air. Reinforcement of the glass starts right after the application and continues in the next 24 hours.

Available with order number #97255