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While preparing whitewash, up to how many grams of ultra-marine blue is added per kg of lime?(a) 3 gm(b) 30 gm(c) 200 gm(d) 300 gmThe question was posed to me by my school principal while I was bunking the class.Question is from Distempering in portion Painting, Varnishing, Distempering, etc of Construction & Building Materials

Answer»

Right option is (a) 3 gm

The explanation: While preparing WHITEWASH, up to three GRAMS of ultra-marine blue is ADDED per kg of lime. It is usually added to the last two coats of the solution. Ultra-marine blue is a blue colored pigment of sodium aluminosilicate containing sulphur.



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