ELPIDIO EP62 - Page 14

VISCOSITY MEASUREMENT
Note : Please use a filter to strain the paint after dilution(See Fig. G1 ), preventing the nozz le or
straw from clogging due to paint lumps.
Most paints are supplied ready for brush application and will need to be thinned befo re they are
suitable to be sprayed . Follow the manufacturer 's advice on thinning the paint wh en used wi th a
spray gun. The viscosity cup will help you to de t ermine the correct viscosity of pain t to be used .
To determine the correc t viscosity (See Fi g.G2)
1) Stir well the paint before the starting to measure.
2) Dip the viscosity cup fully into the liquid you intend to spray, and fill the viscosity cup to t he bri m
with paint.
3) Take the viscosity cup out of the liquid , hold the viscosity cup over the paint or stain pot, and
then calculate the time it takes for the liquid to drain from the cup. This is called liquid's run - DIN -
seconds(DIN-s). If it takes longer for the liquid to leave the viscosity cup than the time shown on
the chart, di lute the liquid until the run - DIN-seconds(DIN-s) falls within the time range shown for t he
liquid you are using.
4) After completing this process , if you are using a water-based product , clean the viscosity cup
with warm soapy water. If you are using an oil-based product, follow the paint manufactu rer's
instructions for cleaning .
The table below shows recommended run-DIN-seconds for different types of materia l
Solvent-based paints · ··· ··· · ···· ···· ·· ·· ···· ·· ·· ·· ·· ·· ·· ···· · ·· · 15-50
Pr i mers ···· ·· ·· ···· · ··· · ·· · ···· ···· ···· ···· · ·· - · ··· · ··· · ··· ·· ·· ·· ·· 25-50
Pickling ···· ···· ···· ··· · ·· ·· ·· ·· ···· · ··· ···· ···· · ··· ··· · no need to dilute
2C omponent paints ···· ···· ···· ···· ···• · ··· ···· · ··· ·-·· ········ ···· 20-50
Varnishes ···· ···· ···· ···· ·· ·· ··· · ·· ·· ···· ···· ···· ···· ···· · ··· ···· 15-40
Wate r borne paints ···· · ··· · ·· · ·· ·· · ··· ·· ·· ···· ··· · · ··· ···· ···· ···· 20-40
Automot i ve topcoats ··· · · ··· • ··· ···· ···· ···· · ··· ·· ·· ···· ···· ···· 20-40
Wood preservatives ··· · ·· ·· ···· ···· ···· ·· ·· · ··· no need to dilute
Clear Sealer, Polyurethane , Stain ···· ···· ···· no need to dilute
Enamel , Latex Paint
........ 25-40
If the paint takes longer than the recommended time to empty , then further th in ning is requ i red .
Mix in a small quantity of the appropr i ate thinner and use the viscosity test until the correct
thickness is achieved .
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