> About 60 �dips� (of a paint roller) will
> use one litre of paint and cover about 15 m2.
> ...
> In each hour you will use about 7 litres of
> paint and cover a little over 100 m2.

Interestingly, this information can be used to calculate the thickness of
the paint on the wall. Using the relationship that volume (V) = area (A)
times thickness (T) and the first set of data above (V = 1 L = 1000 cm^3 and
A = 15 m^2 = 150 000 cm^2) one can calculate the thickness in centimetres
to be about 6.7 times 10 to the -3 power or 0.067 mm.

The second set of data yields exactly 0.07 mm for the thickness and is
consistent with the first one one since all values are aproximate.

That strikes me as a bit thin even for a coat of paint (it's less than a
tenth of a millimetre). I really don't know anything about the practical
aspects of painting. Is a thickness of less than 0.1 mm reasonable?

Regards,
Bill Hooper

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