Viba Scientific Instruments LLP

Coatings and paints can protect, decorate substrate or conceal the defects of substrate, and these three functions are related with coatings hardness. And hardness is the important performance for paint mechanical strength, as well as the important indicator to judge paint quality. One of important indicators to evaluate coatings hardness is scratch tester.

ISO 1518 《Paints and varnishes -- Determination of scratch resistance》specifies a test method for determining under defined conditions the resistance of a single coating or a multi-coat system of paint, varnish or related product to penetration by scratching with a scratch stylus loaded with a specified load. Penetration of the stylus is to the substrate, except in the case of a multi-coat system, in which case the stylus can penetrate either to the substrate or to an intermediate coat.

This test has been found to be useful in comparing the scratch resistance of different coatings. It is most useful in providing relative ratings for a series of coated panels exhibiting significant differences in scratch resistance. 

Before 2011, there is only one standard which is used to evaluate paint scratch resistance, which against to evaluate scientifically to paints scratch resistance under different applications. After revise this standard on 2011, this test method is divided two parts: One is constant-loading, i.e the loading to panels is constant during the scratch test, and the test results is shown as max. weights which don’t damage coatings. The other is variable loading, i.e. the loading on which stylus loads test panel is increased continuously from 0 during the whole test, then measure the distance from finial point to the other point when the paint appear scratch. Testing result is shown as critical loads. 

As a important member of Chinese Paint & Coating Standard Committee , Biuged is responsible for drafting the relative Chinese standards on the base of ISO 1518, and developed BGD 520 scratch testers which conforms the newest ISO 1518:2011.

 

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◆ Big working table can be moved left and  right—convenient  for measuring different areas in the same panel

◆ Special fixing device for sample---can test different size substrate

◆ Sound-light Alarm system for puncturing through sample panel---more visual

◆ High hardness material stylus---more durable

BGD 500 Digital Pull-off Adhesion Tester is a portable, hand-operated instrument which is used to measure the force required to pull a specified test diameter of coating away from its substrate using hydraulic pressure. The pressure is displayed on a digital LCD and represents the coating’s strength of adhesion to the substrate.

  It evaluates the adhesion (pull-off strength) of a coating by determining the greatest tensile pull-off force that it can bear before detaching. Breaking points, demonstrated by fractured surfaces, occur along the weakest plane within the system consisting of dolly, adhesive, coating layers and substrate.

 

   BGD 500 Digital Pull-off adhesion Tester conforms to ASTM D 4541, ASTM D 7234, EN 13144, ISO 4624, ISO 16276 etc.

we   viba   scientific instrument  provides all types   of   scientific   instruments required in labs

Established in year 2014, “Viba Scientific Instruments LLP” is manufacturing Digital Refactometer, Testing Machines, Flame Photometer etc.

Biuged series Color Assessment Cabinets provide different lights and are controlled by a microprocessor LCD Screen that shows each Lighting usage Time. Each Button controls the individual set of Lights. The CLR（Clear）button allows the resetting of the Lighting Usage Time to ZERO when new lights are replaced. The ON/OFF Switch button must be switched off during long hours（more than 3 to 4 hours）of non-operation. This is to reduce the possibility of heat-up as well as to increase the life span of the electronic ballast. All Lights can be switched on at the same time as according to the user needs. The optional Diffused Glass Panel below the lights ensures the elimination of direct reflection of lights to viewing products, There is no Warm-Up time/Flickering of Lights when there is a constant electrical supply. All electrical components used are of low power consumption and heat generation for energy efficiency in.

The international approved Light Gray Non-Reflective Surface ensures that no light is being reflected from the surface during color matching, so, what you see of your products in our Biuged Color Assessment Cabinets will be as natural as what you view them under the natural color matching conditions. The Non-Reflective Surface has certain degree of roughness not only acts as light absorption when light are illuminated, but it is also scratched-resistance, Many Color-Matching Cabinets do not have this dual ability.

All Biuged Color Assessment Cabinets conform to ISO 3668, ISO 13076，ASTM D 1729