Viscosity

The method of measuring of the density consist of determining the mass of tested material, which is placed to the container (pycnometer) of  known volume at a certain temperature. To calculate the density the obtained weight divided  by volume of tested liquid.

Density tester (pycnometer) NOVOTEST P-2811 is complies with ISO 2811-1.

 

Operation principle

 

The tested material is poured into pycnometer, after that the cap is covered with overflow hole. Surpluses of fluid, which are flowing through overflow hole carefully removed with a soft material (if necessary, moistened with solvent).

 

The density of paint or other material is calculated by formula:

ρ = (m2 — m0) / V, where

m0 – mass of empty pycnometer, g

m2 – mass of pycnometer with tested material, g

V – volume of pycnometer cm3.

Viscosity Flow Cup NOVOTEST VZ is designed for rapid determination of the relative viscosity (flow time) of paints and other (Newtonian) liquids.

Viscosity cup could be manufactured in compliance with: DIN 53211-87 (DIN 4), UNE ISO DIN 2431, ASTM D 120087 (FORD), ASTM D 4212-93 (ZHAN).

 

Viscosity cup is available in two models: on a tripod – Viscosity Flow Cup NOVOTEST VZ and a submersible type – Viscosity Dip Cup NOVOTEST VZ-P.

Viscosity cup is a reservoir shaped like a funnel with three interchangeable nozzles.

 

The operating principle of the viscometer is based on determining of the time of the expiration of a certain volume of the testing liquid through the nozzle. Viscosity Flow Cup NOVOTEST VZ is produced of stainless steel.

Viscosity cup – is one of the fundamental parameters measuring tool for consumables. It is used to control the viscosity of applicable liquids, as varnishes, paints, oils, liquid inks, and others. The conventional viscosity value is determined by the time (in seconds) during which a known volume of fluid flowing through the nozzle of a certain diameter.

The kinematic viscosity is determined by formulas or by tables and graphs out of measured flow time.

Viscosity Dip Cup NOVOTEST VZ-P is designed for rapid determination of the relative viscosity (flow time) paints and other related products (Newtonian liquids).

Viscosity cup could be manufactured in compliance with: DIN 53211-87 (DIN 4), UNE ISO DIN 2431, ASTM D 120087 (FORD), ASTM D 4212-93 (ZHAN).

 

Viscosity cup is available in two models: on a tripod – Viscosity Flow Cup NOVOTEST VZ and a submersible type Viscosity Dip Cup NOVOTEST VZ-P.

Viscosity cup is a reservoir shaped like a funnel with three exchangeable nozzles. Viscosity Dip Cup NOVOTEST VZ-P is produced from stainless steel.

 

The operating principle of the viscometer is based on determining the time of the expiration of a certain volume of the test liquid through the nozzle.

Viscosity cup – one of the fundamental parameters measuring tool of consumables. When working with varnishes and liquid inks (flexo) it is used to measure the viscosity of the funnel. The viscosity value is determined by the number of seconds (the time at which the liquid runs out of the crater-filled).

Conventional viscosity of paints, is measured by time of continuous flowing (in seconds) of definite quantity of test material through the calibrated nozzle of viscometer. Kinematic viscosity is determined by formulas or by tables and graphs according to  measured flow time.

Viscosity Dip Mug is used to determine the convectional viscosity of the dispersion polyvinyl-acetate homopolymers coarse dispersion.
 
The device is a cylindrical brass vessel with a handle and three orifices, two of them are located at the lateral wall of the cylinder (by manual – lateral orifices), and the third – at the centre of the base (base orifice).
 
Conventional viscosity using the standard viscosity mug is to be determined at (20 ± 2) ° C. The dispersion need to be thoroughly mixed, and poured a full mug. Than lift it and watch the level of the dispersion. When the dispersion level in the viscosity mug decreases and opens the upper lateral orifice – start the stopwatch. The stopwatch is to be stopped at that moment when the dispersion comes to the level of the lower lateral orifice. The viscosity index is definite by the time (in seconds) that takes the dispersion to lower the level  from the upper lateral orifice to the lower lateral orifice. The result of the testing is the average value of three parallel testing (the discrepancy between of them should not exceed 10%).

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