Limewash is a very ancient paint made from limestone which has been crushed, burnt and slaked with water to make lime putty.
http://www.mikewye.co.uk/chart.htm

http://kalkenkrijtverf.come2me.nl/1074051/kaleiverf-info

Whitewash & limewash

Lime wash is pure slaked lime in water. It produces a unique surface glow due the to refraction of calcite crystals. Limewash and whitewash both cure to become the same material.
When limewash is initially applied it has very low opacity, which can lead novices to overthicken the paint. Drying increases opacity, and subsequent curing increases opacity again.
http://en.wikipedia.org/wiki/Whitewash

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Note added at 5 hrs (2009-09-06 23:45:28 GMT)
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Hier nog twee linken die eea duidelijk maken, gebaseerd op "St-Astier:"

RC Kalei is een kaleimortel op basis van de natuurlijke
hydraulische kalk van St.-Astier en passende toeslagstoffen.
RC Kalei bevat 0% cement en benadert hiermee het best
de traditionele duurzame techniek van weleer. RC Kalei
functioneert als een structuurlaag op bakstenen en beton om
nadien eventueel te overschilderen met kalkverven.
http://users.telenet.be/jillian/html/technische_fiche_kalei....

Lime Paints
A set of User Guidelines for Lime Wash Paint and suitable applications. This Guide covers, use, backgrounds and protection of Lime Wash finishes on Plaster, Render and Harling.
http://www.stastier.co.uk/lime-wash.htm