Devices of the complex control of a condition of coatings and devices of complex quality assurance of sheetings

Viscosity Flow Cup DIN 4

DIN 53221

Purpose and Application

Viscosity Cups remain the most important quick and simple method to measure the consistency of fluids in the laboratory and in production. These easy to use cups determine the flow time of paints, varnishes and other Newtonian (or near Newtonian) fluids. The measured kinematic viscosity is generally expressed in seconds (s) flow time, which can be converted to Centistokes (cSt) if the Standard stipulates a conversion method.

Measurining Principle

The viscosity is established in terms of the time in seconds in which a precisely controlled volume of fluid flows out through the orifice of the viscosity cup.
Design Details
Viscosity Cups consist of a hollow cylinder which terminate in a orifice in the bottom. Excess fluid is collected in a gutter channel.
Flow cups are made of aluminum body with a stainless steel orifice.

Technical characteristics

• Flow cup DIN 4 with orifice diameter of 4 mm;
• This cup holds 100 ml ± 1 ml;
• Efflux time with the range of 25 to 150 s;
• Viscosity range 90-682 cSt;
• Limit of value of the basic error in measurement of time of the expiration no more ± 3% of average arithmetic value of time of the expiration;
• Outline dimensions of the device (without a flow cup stand):
  • Diameter: No more than 86 mm;
  • Height: No more than 86 mm.

Test Procedure

The general test process is described as follows:

1. Level stand, using spirit level
2. Place cup in the stand
3. Close nozzle
4. Fill the cup with fluid
5. Wipe off surplus material across the edge of the cup with a glass plate
6. Open orifice and simultaneously set stopwatch in motion
7. At the first break off in the fluid flow stop stopwatch and note time

Delivery Set

The flow cup, flow cup stand, the operating manual, packing.

Viscosity flow cup ISO 2431

ISO 2431, ASTM D 5125

Purpose and Application

Viscosity Cups remain the most important quick and simple method to measure the consistency of fluids in the laboratory and in production. These easy to use cups determine the flow time of paints, varnishes and other Newtonian (or near Newtonian) fluids. The measured kinematic viscosity is generally expressed in seconds (s) flow time, which can be converted to Centistokes (cSt) if the Standard stipulates a conversion method. Viscosity flow cups ISO 2431 are selected to provide an efflux time with the range of 20 to 100 s and viscosities up to 700 cSt (700 mm2/s).

Measuring Principle

The viscosity is established in terms of the time in seconds in which a precisely controlled volume of fluid flows out through the orifice of the viscosity cup.

Design Details

Viscosity Cups consist of a hollow cylinder which terminate in an orifice in the bottom. Excess fluid is collected in a gutter channel. Flow cups are made of aluminum body with a stainless steel orifice.

Technical characteristics

• Flow cup ISO 2431 No3 with orifice diameter of 3 mm. Viscosity range 7-42 cSt;
• Flow cup ISO 2431 No4 with orifice diameter of 4 mm. Viscosity range 35-135 cSt;
• Flow cup ISO 2431 No5 with orifice diameter of 5 mm. Viscosity range 91-325 cSt;
• Flow cup ISO 2431 No6 with orifice diameter of 6 mm. Viscosity range 188-684 cSt;
• Limit of value of the basic error in measurement of time of the expiration no more ± 3% of average arithmetic value of time of the expiration;
• Outline dimensions of the device (without a flow cup stand):
  • Diameter: No more than 86 mm;
  • Height: No more than 86 mm.

Test Procedure

The general test process is described as follows: Level stand, using spirit level. Place cup in the stand. Close orifice. Fill the cup with fluid. Wipe off surplus material across the edge of the cup with a glass plate. Open orifice and simultaneously set stopwatch in motion. At the first break off in the fluid flow stop stopwatch and note time.

Delivery Set

The flow cup, flow cup stand, pin (under the separate order), the operating manual, packing.

Specific Gravity Cups/Picnometer/Density Cups

ISO 2811-1

Purpose and Application

The cups are used to quickly and accurately determinate the density or specific gravity of liquid paint, varnish and similar products.

Measuring Principle

The method consists in definition of weight of the examinee of the material placed in cup with known capacity at certain temperature.

Design Details

This instrument consists of an aluminium cylindrical container and cover with a hole for exhaust excess liquid.

Technical characteristics

• Capacity 100 cc or 50 cc;
• Overall dimensions, no more 52x75 mm or 47x55 mm;
• Weight, no more 90 gramms.

Test Procedure

1. Determine the weight of a clean cup in grams
2. Remove cover and fill within 2mm of brim with the material to be tested
3. Carefully replace cover so that air and excess material is expelled through vent
4. Wipe over cover to remove surplus and reweigh. By subtracting the original weight of the cup the weight of the contents will be found. If a tare weight was used at the start the balance will show the weight of the contents
5. Clean thoroughly immediately after use
6. Specific gravity is assess with formula
   Pt = (m₂ - m₀) / V, where:
   m₀- weight empty cup in grams,
   m₂ - weight cup with the examinee a material in grams,
   V - capacity, cc.

Delivery Set

The gravity cup, the operating manual, packing.

Wet Film Thickness Gauge

ISO 2808

Application

For quick and easy thickness measurement of freshly applied wet paint.

Design Details

This precision measuring gauge made of stainless steel.

Test Procedure

1. Select scale range
2. Place gauge on wet film at 90° angle
3. Press into film
4. Withdraw and note deepest tooth or notch having paint on it and next higher tooth that is not coated
5. The wet film thickness lies between these two readings
6. Clean gauge with any suitable solvent immediately after use. Wipe dry. Do not leave gauge immersed in solvent.

Technical characteristics

Delivery Set

The wet film thickness gauge, the operating manual.

Scratch Hardness Tester Kooh-I-Noor

ASTM D 3363, ISO 15184

Purpose and Application

The scratch-hardness testing instrument uses the hardness pencil Method. This is a simple a quick method to determine the resistance of coating materials to surface scratching and is of particular use for furniture or vehicle lacquers. It is also useful in the testing of synthetic resins and other film forming materials. The speed of measuring permits test the production, e.g. Coil Coating. The test instrument enables the test to be carried out in accordance with a Wolff-Wilborn and ensures that the specified force and angle remain constant throughout. Guidance of the instrument is easy and excludes manual influences of the pencil pressure.

Technique of the control

The pencil of average hardness gets out, sharpened and located in the vertical holder. The pencil rotates in the holder under a corner 90° to an emery paper before reception of flat, smooth circular section of a pencil. The pencil is inserted into the carriage so that it concerned a flat surface. The pencil is fixed in the carriage by a clamp so that the bottom side of the carriage was parallel to the basis. The carriage establish in the beginning of tested plates and advance approximately on 6-12 mm. Turn a pencil on 90 °, return the carriage in the beginning, advance the carriage in the same party, as at the first test for 6-12 mm. Define presence of scratches and dents on a covering. At their absence repeat test with firmer pencil. Tests repeat before selection of pair pencils, one of which leaves scratches and dents on a covering, and another - is not present. The minimal hardness of a pencil which will damage a surface, is accepted to the measured value of hardness of a covering.

Technical characteristics

Hardness of applied pencils 1500 Koh-I-Noor	5B-5H
Overall dimensions of the carriage	No more than 140x140x140 mm
Effort of pressing of a slate pencil	7,5 H
Corner of installation of a slate pencil	45°

Delivery Set

The carriage, set of pencils 1500 Koh-I-Noor (12 pieces), emery paper, the vertical holder, packing, the operation manual.

Wet Film Thickness Wheel

ISO 2808

Application

Specially developed for use on wet lacquers, paint and coil coated surfaces.

Description

These gauges is in the form of a stainless steel wheel approximately 50 mm in diameter made up of 3 disk sections. Machined from a single piece of stainless steel stock, the two outer disks are of the same diameter. The center disk is somewhat smaller and is eccentric to the outer disks. When the gauge is rolled over a wet film the eccentric disk will pick up the material only at and below the actual thickness which permits its immediate and direct reading.

Technique of the control

Clasp the gauge with the thumb and forefinger so that the gauge body is free to turn. Place the gauge on a freshly coated surface at the maximum graduation mark and roll the gauge one-half a revolution to the "0" mark. Lift the gauge and place on another part of the surface with the maximum mark in contact with the coating. Then roll the gauge in the opposite direction to the "0" mark. Examination of the center disk will show thickness at which pickup of the wet coating thickness has taken place and the averaging of these values may be the true wet coating thickness.

Technical characteristics

Modification	Diameter, mm	Range, µm
EK200	50	0-200
EK500	50	0-500

 

Delivery Set

The wet film thickness gauge, the operating manual.

Grindometers

ISO 1524

Purpose and Application

From development of coatings and inks in the laboratory to testing during the production process, quick and precise measurement of the particle size of the material - be it pigments or other similar materials - is one of the essential measurement techniques required for reliable and repeatable results.
Grindometer is precision instrument to determine particle size and fineness of many materials like paints, lacquers, pigments, filler, chocolate etc.

Design Details

Fineness of grind gauges comprise of hardened tool steel blocks (base) and scraper. Each channels on block are precision ground in a uniformly increasing depth from zero at one end to as specified depth at the other, identified by the scale on the gauge.
Scrapers are made of hardened tool steel.
Models are available in microns graduation.

Test Procedure

1. Place the material to be tested on the lowest (deepest) part of the groove
2. The material is drawn up the slope in the opposite direction with the scraper.
3. The place where a large number of particles appears indicates the particle size.

Technical characteristics

Modification	Range, µm	Step of the measurement, µm
Grindometer 15	15	1,5
Grindometer 25	25	2,5
Grindometer 50	50	5,0
Grindometer 100	100	10,0
Grindometer 150	150	15,0

Overal dimensions:

• The base: 175x35x20mm with 125 mm groove length.
• The scraper: 60x40x6 mm.

Delivery Set

The base, the scraper, the operating manual, packing.

NDT1 KRAFT 2009