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Lime Casein Wall Paint - Dr. Georg Kremer, Dipl.-Chemiker, Farbmühle

Lime Casein Wall Paint

Basic recipe:
40 g Powder casein (no. 63200)
125 ml water (cold!)
33 g lime putty (no. 31800)

The weighed casein powder and the water are placed in the mortar or mixing dish, covered, and left to soak for several hours in a warm place. It is best to leave it overnight to make sure that the casein has swelled
completely and has absorbed as much water as possible. The resulting casein sludge is treated like fresh curd by hydrolyzing it with the given amount of lime (20 %). This recipe never fails to produce a good,
thick casein glue of even consistency. It has, however, the disadvantage of gelling even faster than casein glue made from fresh curd and must therefore be used to make paints or diluted as soon as possible. The
gelling procedure can be avoided by diluting with water by filling up to a total volume of 1 liter and then stirring in about 1 teaspoon of cere-stucco soap (79230) 5 minutes after adding the lime. The resulting
solution is a 4% casein-lime solution. All lime-caseins are to some extent weatherproof and therefore represent a special group among the mural
media. The walls can be ground-coated by diluting the 4 % casein-lime solution with 9 parts of water and applying this solution onto the walls.


White Lime Casein Wall Paint

1 Liter casein-lime dilution can be mixed with about 1 kg pigment, e.g. titanium white (46200) or chalk from champagne (58000) or a mixture of both. The wall paint should obtain a consistency which is easy to spread, i.e. like condensed milk. Should the paint become too thick it can be diluted again. Always use the 4 % casein-lime solution and not with pure water.
Always make a trial coat to check the bond before applying the first coating since the amount of binding agent is different for each pigment. Should the paint be too chalky, more concentrated casein-lime solution
has to be added, if it shows cracks or peeling problems the paint contains too much lime and therefore has to be diluted further and more pigment added.

It is always recommended to use pigments which are lime fast.

- Consumption on clay plaster: approx. 150 ml / m2 / coating
- Consumption on lime plaster: approx. 100 ml / m2 / coating


Colored Lime Casein Wall Paint

1 Liter casein-lime dilution can be mixed with about 1 kg pigment, e.g. earth colors or other pigments from the list of Fresco Colors. The wall paint should obtain a consistency which is easy to spread, i.e. like
condensed milk. Should the paint become too thick it can be diluted again. Always use the 4 % casein-lime solution and not with pure water.
Always make a trial coat to check the bond before applying the first coating since the amount of binding agent is different for each pigment. Should the paint be too chalky, more concentrated casein-lime solution
has to be added, if it shows cracks or peeling problems the paint contains too much lime and therefore has to be diluted further and more pigment added.

It is always recommended to use pigments which are lime fast.

- Consumption on clay plaster: approx. 150 ml / m2 / coating
- Consumption on lime plaster: approx. 100 ml / m2 / coating


Lime-Casein Wall Glaze Paint

Basic Recipe:
1 Part of 4 % casein-lime solution
4 Parts of water
Add between 20 and 100 g of pigment per liter of lime-casein wall glaze medium and apply with a glaze brush or with a sponge.

- Consumption on clay plaster: approx. 150 ml / m2 / coating
- Consumption on lime-casein wall paint: approx. 80 ml / m2 / coating
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