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Wet Paint Analysis

DENSITY

	Definition	Mass per unit volume of a material at a specified temperature.
	Standards	ASTM D 4138, D 1475, D 2805 BS 3900 A 19 DIN 53217 ISO 2811
	Significance	If density is not within specification, there is a high probability of error in batch charging. Density acts as an important check on solids content of paint.

NON VOLATILE MATTER

	Definition	The volume of the dried coating divided by the volume of liquid coating, multiplied by 100, provides the volume percent non-volatile matter inthe total liquid coating.
	Standards	ASTM D 2697
	Significance	Indicates the weight solids in paint. Higher solids means higher coverage

Viscosity by Ford Cup

	Definition	Viscosity is the force per unit area that resists the flow of two parallel fluid layers.
	Standards	ASTM D 1200
	Significance	Flow & levelling properties. Anti-sag properties.

Volume Solids

	Definition	Defined as the total volume of non-volatile solids present in one litre of paint.
	Standards	ASTM D 2697
	Significance	A measure of spreading capacity of paint Higher volume solids product will give higher coverage at a given DFT. Higher volume solids products are being preferred due to VOC regulations in developed countries.

Brookfield LV

	Definition
	Standards
	Significance

VISCOSITY

	Definition	Stormer viscometers
	Standards	ASTM D 562
	Significance	Paddle is immersed in the paint and load in weight applied throught string Paddle is immersed in the paint and load in weight applied throught string Stroboscopic timer will indicate the motionless lines when 200 rmp is achieved

Blast Clean Test

	Definition	The pottassuim ferricyanide test for water-soluble iron salt that from at the bottom of rust pits after blast-cleaning.
	International Standards	BS 5493
	Significance	Simply spray a film of deionised water on an area of the blast-cleaned steel.held the test paper against the surface for about 10 seconds Any soluble iron salts present are drawn out of the rust pits by capillary action and react with the potassium ferricyanide to form blue spots The presence of blue spots on the test paper indicates that the surface should be re-blasted.

Bresle Test

	Definition	International Standards: ISO 8502-6 and ISO 8502-9 Contaminating the surface prior to the coating application due to salts such as chlorides and sulphates
	Standards
	Significance	Take 10 ml of distilled water into the beaker. Determine the conductivity. Apply the Bresle patch on the test surface. Inject and extract back 2.5 ml of test water up to 10 cycles. Transfer the test water back into the beaker. Check the conductivity again. Multiply reading by 0.4 = quantity of salt in g/cm = ppm

Wet Film Thickness

	Definition	Dete rmined as being between the clearance of the deepest notch face wetted and the clearance of the next deeper notch face not wetted by the film.
	Standards	ASTM D 4414-A
		DFT = WFT x % Vol.Solid The wet-film thickness is determind as being between the clearance of the deepest notch face wetted and the clearance of the next deeper notch face not wetted by the film.

Flash Point

	Definition
	Standards
	Significance

Sag-Index-Applicator

	Definition
	Standards
	Significance