hempel product data sheets

To convert From To Calculate
Temperature: Celcius Fahrenheit (9/5 x °C) + 32
Fahrenheit Celcius 5/9 x (°F - 32)
Film thickness:
(micron)
Wet Dry
CALCULATION OF
Dry Wet
wft x VS%
100
dft x 100
VS%
wft = wet film thickness, dft = dry film thickness, VS% = Volume Solids
Theoretical Spreading Rate (on completely smooth surface)
VS% x 10
desired dft (micron)
In m² per litre =
In sq.ft. per US gallon
Theoretical Paint Consumption (on completely smooth surface)
In litre =
In US gallon =
Practical consumption:
area (m 2 ) x desired dft (micron)
VS% x 10
area (sq.ft.) x desired dft (mil)
VS% x 16.04
=
VS% x 16.04
desired dft (mil)
The practical consumption is influenced by i) simple losses, by ii) additional consumption to fill up the "dead volume" of
the surface roughness, but especially iii) by the "waviness" of the paint surface. However, the term "loss factor" is still
used in parallel with the term "consumption factor" to describe a relationship between the theoretical, calculated
consumption and a practical either observed de-factor consumption or an "aimed at" consumption.
Practical consumption =
However, as
area x consumption factor
theoretical spreading rate
100
Consumption factor = 100 z% (z = "loss" = simple loss + dead volume loss + waviness loss)
and
theoretical spreading rate =
VS% x 10
DFT
the practical consumption could be written as
CONVERSION TABLES Page 2D/5
10 x DFT x area
VS% x (100-z%)
where it is very important to use the "loss"for z and not the consumption factor.
Issued: October 1999/Page 2D of 5