Clarke AP14GFM User Manual download pdf (Page 8)

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PAINT THINNING

Paint thinning is particularly important when spraying. Many paints are

supplied ready for brush application and need to be sufficiently diluted for

spraying purposes. Always follow the paint manufacturers instructions. If in

doubt, always consult the paint manufacturer.

A Viscosity Cup (not supplied), will assist in determining the correct thickness of

the paint.

The ideal viscosity for most paints is as follows:

1. Dip the cup into the paint and fill to the brim. Time how long it takes for the

cup to empty.

2. Thin as required until times are achieved.

3. Alternatively if a viscosity cup is not available, the following information

can be used as a rough guide.

• Water based paints (emulsions) 10-20% water.

• Oil based paints (gloss) up to 10% thinners.

• Cellulose paints up to 50% cellulose thinners.

If in any doubt, contact the paint manufacturer.

4. Having mixed the paint thoroughly in a separate container, pour into the

spray gun paint container through a fine filter.

• DO NOT OVERFILL PAINT CONTAINER - never more than three

quarters full.

Water based paints 35-45 secs

Oil based paints 15-25 secs

Enamel paints 15-25 secs

Primers 20-30 secs

Varnishes 20-25 secs

Aluminium paints 15-25 secs

Wood preservatives Do not dilute

Wood Stains Do not dilute

Smooth masonry paint Dilute by 10-15%

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Clarke AP14GFM User Manual Page 8