• Why Should You Care Shore Hardness?
    Why Should You Care Shore Hardness? September 18, 2021
    What is shore hardness and how is it measured? The Shore durometer is a device for measuring the hardness of a material, typically of polymers, elastomers, and rubbers.Named after its inventor, Albert Ferdinand Shore, Shore hardness offers different scales for measuring the solidity of different materials. A standardised test used industry-wide, the Shore D hardness technique measures the depth of penetration of an indenter, generally using ASTM D2240 and ISO 868 test methods. With readings taken between 0 and 100, Shore hardness measures are dimensionless.Each scale will result in a value from 0 and 100, with the higher number relating to increased hardness. The Shore A and Shore D: The A scale is for softer ones, while the D scale is for harder ones. Shore A is specified for softer elastomer measurements using a needle with a blunted point. Shore D is specified for harder elastomer measurements using a needle that ends with a 30° point angle and is not blunted. How Does a Shore Hardness Test Work? Shore D Hardness is a standardized test consisting in measuring the depth of penetration of a specific indenter. Durometer, like many other hardness tests, measures the depth of an indentation in the material created by a given force on a standardized presser foot. This depth is dependent on the hardness of the material, its viscoelastic properties, the shape of the presser foot, and the duration of the test. ASTM D2240 durometers allows for a measurement of the initial hardness, or the indentation hardness after a given period of time. The basic test requires applying the force in a consistent manner, without shock, and measuring the hardness (depth of the indentation). If a timed hardness is desired, force is applied for the required time and then read. The material under test should be a minimum of 6 mm (0.25 inches) thick. GESTER Shore A Durometer GT-KD09-LX-A is designed for vulcanized rubber and plastic hardness testing. The A scale for rubbers in the normal-hardness range. This instruments simple structure and easy to use, light-type body, intuitive readings.
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  • The importance Of Color Assessment Cabinet for Fabric (textile light box)
    The importance Of Color Assessment Cabinet for Fabric (textile light box) May 12, 2021
    catching c? Color Assessment Cabinet For Fabric: Colors appear differently under different lighting sources. To avoid/reduce the assessment error when performing color contrast, we can use of a Light Booth / Viewing Booth / Color Light Box to simulate different light sources to obtain an objective assessment of color and color difference, anytime, anywhere.  Why need use olour matching light boxlight booth for color matchingHere you can see the feature of color assessment cabinets : 1. Color Assessment Cabinet for Fabricrender more accurately. With 6 different light sources (D65, TL84, CWF, F, UV, U30), which can detect the metamerism. 2. Colour matching light box: Meets or exceeds major international standards for visual color evaluation including: ASTM D1729, ISO3664, DIN, ANSI and BSI. 3. Easy to operate by using individual switches for each light source. 4. Elapsed time meter for tracking optimal lamp replacement. 5. Automatically alternating among light sources. 6. No warm-up time or flickering which insures quick and reliable color judgment. 7. Economic power consumption and low heat generation for high light efficiency
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  • What are the ways to improve the color fastness to light
    What are the ways to improve the color fastness to light April 16, 2021
    What is the light fastness Color fastness to light, also known as light fastness, refers to textiles that are usually exposed to light during use. Light can destroy dyes and cause the well-known "fading", which makes colored textiles discolored, generally lighter and darker. What is the color fastness to light machine test principle The textile and a set of blue wool standard samples are exposed to artificial light sources under specified conditions, and then the color change of the sample is compared with the blue wool standard sample to evaluate the color fastness. What is the color fastness to light machine test standard At present, there are mainly three commonly used standards for testing light fastness: GB/T 8427, ISO 105-B02, AATCC 16.3. GESTER Instrument: Light Fastness Testing Machine GT-D02A-1 Factors affecting light fastness The main factors that affect the fading of the sun include light, the molecular structure of the dye, the focus state of the dye, the depth of dyeing, the color matching of the dye, the auxiliaries required for the dyeing process, the characteristics of the fiber, and the locality. Methods to improve color fastness to light 1. The choice of dyes: dyes with high light fastness are preferred, which can prevent or reduce the occurrence of photooxidation reactions; 2. In the color matching of dyes, select component dyes with equivalent light fastness to ensure the light fastness level; 3. The fixing agent has a close relationship with the light fastness of the dye. The use of non-surfactant ammonium salt type fixing agent and reactive fixing agent can effectively improve the light fastness. Main products: nylon, cotton and light color, fluorescent color products.
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  • Textile color fastness test items
    Textile color fastness test items March 23, 2021
    Color fastness is also called color fastness and dyeing fastness. It refers to the resistance of the color of textiles to various effects during processing and use. The fastness grade is evaluated according to the discoloration of the sample and the staining of the undyed lining fabric. Textile color fastness test is a routine test item in the internal quality test of textiles. During its use, textiles will be exposed to various external effects such as light, washing, ironing, perspiration, friction and chemical agents. Some printed and dyed textiles are also subjected to special finishing processes, such as resin finishing, flame retardant finishing, sand washing, and grinding. This requires the color of printed and dyed textiles to maintain a certain degree of fastness. Color fastness test items Washing color fastness: The sample is sewn together with the standard lining fabric, washed, washed and dried, and washed under suitable temperature, alkalinity, bleaching and friction conditions, so that the test results can be obtained in a short time .Use machine: color fastness to washing GT-D07 Color fastness to dry cleaning: Same as color fastness to washing, except that washing is changed to dry cleaning.Use GESTER machine:Dry Cleaning And Washing Cylinder GT-C36 Color fastness to rubbing: Put the sample on the rubbing fastness meter, rub it with a standard white cloth under a certain pressure for a certain number of times. Each group of samples needs to be dry rubbing color fastness and wet rubbing color fastness. The color stained on the standard rubbing white cloth is graded with a gray card, and the grade obtained is the measured rubbing color fastness. The color fastness to rubbing needs to be tested for dry rubbing and wet rubbing. All the colors on the sample must be rubbed. Use machine: Electronic Crockmeter GT-D04 Light fastness: Textiles are usually exposed to light when they are in use. Light can destroy dyes and cause the well-known "fading", which makes colored textiles lighter and darker, and some color changes will also occur. , It is necessary to test the color fastness. The light fastness test is to put the sample and blue wool standard cloth of different fastness grades together under the specified conditions for sunlight exposure, and the sample and the blue wool The cloth is compared to evaluate the light fastness. The higher the blue wool standard cloth, the better the light fastness. Use machine: Air-Cooled Light Fastness Tester GT-D02A-1 Color fastness to perspiration: sew the sample together with the standard lining fabric, put it in a sweat solution, and place it on the perspiration fastness tester, put it in an oven at a constant temperature, then dry, and grade it with a gray card. Get the test results. Different test methods have different perspiration liquid ratios, different sample sizes, and different test temperatures and times. Use GESTER machine:Perspiration Tester GT-D09 Color fastness to water stains: Test as ...
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  • Comparison of mask filtration performance standards
    Comparison of mask filtration performance standards January 29, 2021
    As we all know, an important transmission route of the new coronavirus is aerosol transmission. Therefore, when people choose masks, they should not only pay attention to the filtration efficiency of BFE, but also the filtration performance of PFE, which directly determines the protective performance of the entire mask. General international standards for masks 1.American Standard NIOSH 42 -84 "NIOSH Guide to the Selection and Use of Particulate Respirators" Issued by NIOSH (National Institute of Occupational Safety and Health), it is the technical regulations of the CFR of the United States Federal Regulations. The relevant standards (or parts of the chapters) and relevant guidelines (or parts of the chapters) specified in the CFR become the mandatory technical specifications of the United States. 2.Japanese standard JIS T 8151: 2018 "Particulate respirators" JIST8151: 2018 is the Japanese national standard, issued by the Japanese Industrial Standards Committee (JISC). 3.Australia and New Zealand standards AS/NZS 1716-2012 《Respiratory protective devices》 This standard is a national standard used by Australia and New Zealand. International standards for medical masks The main function of medical masks is to filter particles in the air, blocking droplets, blood, body fluids, secretion droplets, etc. The key technical indicators that play a protective performance in medical masks are the filtration efficiency of particulates and bacteria, and blood penetration resistance. 1.European standards EN 14683-2019 "Medical face masks-Requirements and test methods" This standard is a European standard, formulated and issued by the European Committee for Standardization CEN, and implemented in 34 EU countries. The standard itself is not mandatory, but it may be subject to the laws of EU countries The citation of regulations becomes the technical regulations (mandatory standards) within each country. 2.American Standard ASTM F2100-2019 "Standard Specification for Performance of Materials Used in Medical Face Masks" is a standard of the American Society for Testing and Materials. The association has a history of 120 years. More than 12,500 members from more than 140 countries and more than 30,000 participated A number of ASTM standards, ASTM standards are widely used all over the world, becoming the de facto "international standards" in various industries. GESTER Mask Testing Equipment: BFE testing machine - Mask Bacterial Filtration Efficiency Tester PFE tester - Particulate Filtration Efficiency Tester
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  • About EN 149:2001+A1:2009(E)
    About EN 149:2001+A1:2009(E) "Respiratory Protective Equipment-Particulate Protection Filter Half Mask-Requirements, Testing and Marking" August 20, 2020
    In the EU market, the “CE” mark is a compulsory certification mark. Whether it is a product produced by an EU enterprise or a product produced in another country, if you want to circulate freely on the EU market, you must affix the “CE” mark to show that the product complies with The basic requirements of the EU "New Methods of Technical Coordination and Standardization" directive. This is a mandatory requirement of EU law on products. Among them, the applicable regulations for protective masks are (EU) 2016/425 "Personal Protective Equipment Regulations", which belong to category III products. The test standard is EN 149:2001+A1:2009(E) "Respiratory Protective Equipment-Particulate Protection Filter Half Mask-Requirements, Testing and Marking" Respirators that meet the requirements of EN149:2001 are designed to prevent solids, water-based aerosols and oil-based aerosols, and can be dust, fog, or fiber resistant. The standard puts forward 16 indicator requirements, among which the key indicators are practical performance, total leakage, penetration rate of filter material, flammability, carbon dioxide content in inhaled air, exhalation valve (flow treatment, cover fastness), breathing Resistance etc. According to the different particulate protective filter materials, they are tested and classified by NaCl (sodium chloride) and DOP (paraffin oil) aerosols. According to the protection level of masks, it is divided into FFP1, FFP2 and FFP3. The mask testing equipment needed: Mask Flame Retardant Tester GT-RA06 Filter oscillation test chamber GT-RB01 Masks Universal Tensile Strength Tester GT-C02-1 Mask And Respirator Breathing Resistance Tester GT-RA03B Automatic Particulate Filter Efficiency PFE Tester GT-RA09 Programmable Temperature And Humidity Test Chamber GT-C52 Protective Clothing Against Solid Airborne Particles Tester GT-RA08 Non-power Air-purifying Particle Respiratory Protective Tester GT-RA05
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  • Protective Clothing Test Items
    Protective Clothing Test Items March 31, 2020
    Mask Bacterial Filtration Efficiency Test For the testing of medical protective clothing, medical protective masks, and medical surgical masks, to verify the barrier performance of airborne particulates, small non-oily particles with a certain airflow are passed through the medical protective articles to test their filtering efficiency. Protective Clothing Blood Penetration Resistance Test For the testing of medical protective clothing, the simulated blood is squeezed for a long time to check whether the blood penetrates from the medical protective clothing. Water resistance test According to the detection of medical protective clothing, water pressure test is carried out on the medical protective clothing at a certain pressure boosting speed to check whether there is water seepage in the medical protective clothing. Flame retardant test For the detection of medical protective clothing, the sample of medical protective clothing is burned on a flame, and the length of time of burning and the length of burning are detected to judge the flame retardancy. Antistatic test The test for medical protective clothing is to detect the harm caused by static electricity caused by friction of protective clothing, such as adsorption of harmful dust. Put the treated protective clothing into a friction machine to charge it with friction, and read the protective clothing's charge to determine.
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  • About Masks Testing Items
    About Masks Testing Items March 23, 2020
    Mask synthetic blood penetration test For the detection of medical surgical masks and medical protective masks, simulate the rapid blood spray to the outside of the masks, and observe the permeability of blood to the masks. Tightness test For the detection of medical protective masks, a total of 10 subjects, 5 men and 5 women, were selected to simulate the use of medical staff. Air leakage performance after matching the mask with the face. Mask Flame Retardant Test For the detection of medical protective masks and medical surgical masks, metal head molds and burners are used to simulate the situation where the mask wearer passes in a high-temperature flame to detect the flame retardant effect of the mask. Tensile test For the detection of medical protective clothing, the cut protective clothing materials were stretched at the specified speed until breaking through the tensile testing machine to test the strength of the key parts of the protective clothing. Mask Differential Pressure Test Aiming at the detection of medical surgical masks and disposable medical masks, to verify whether wearing a mask will make it difficult to breathe, test the ventilation resistance of the mask, and determine the pressure difference between the two sides of the mask. Mask Bacterial Filtration Efficiency Test For the testing of medical protective clothing, medical protective masks, and medical surgical masks, to verify the barrier performance of airborne particulates, small non-oily particles with a certain airflow are passed through the medical protective articles to test their filtering efficiency.
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