„The testing chamber, and the staff's approach and willingness beyond requirements — I can only recommend them.“
Tomáš Matús
Google review
Microscopic Analysis
In our materials testing laboratory we offer microscopic analysis, manual and automatic quality control of samples, determination of dimensions and analysis of the material structure.
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Over 30 years of experiencein the supply & service of testing technology
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Warranty & post-warranty servicefor our own and competitors' equipment
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Training of your employeesto increase their expertise
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Accredited laboratoriesfor external tests and calibrations
Microscopic analysis
Our laboratory offers services in the field of materials analysis using the most modern technologies.
We provide image documentation for detailed visualisation of structures, interactive measurement for precise and flexible evaluation of samples, and automatic image analysis, which ensures fast and objective results.
We also specialise in specific measurements according to the nature of the material and offer analyses tailored to the individual requirements of customers.
Thanks to the combination of expertise and innovation, we are a reliable partner for research, development and quality control.
Evaluation of test results
We carry out visual inspection after mechanical, climatic and vibration tests. We evaluate above all the size of cracks, material degradation, material corrosion and material failure.
Optical inspection of electronics
We inspect electronics and printed circuit boards (PCB) both regularly after production runs and as individual products. We are able to measure the position and orientation of components or to check the quality of soldering, manufacturing or individual layers.
Measurement of welds and porosity
Microscopic evaluation of a weld serves for a detailed assessment of the internal structure of the weld metal, the heat-affected zone and the base material. Observed, for example, are the size and shape of grains, uniformity of structure, the presence of phases or possible defects such as cracks or inclusions that are not visible to the naked eye.
Thickness of layers and coatings
For an accurate assessment of the quality of these layers, the optical microscopic method is used, which allows direct measurement of the thickness on a cross-section of the sample. During measurement the interface between the coating and the substrate is visually observed, whereby it is possible to accurately determine not only the layer thickness, but also its uniformity and adhesion quality.
Grain size
We carry out material analysis, above all for measuring single-phase structures (e.g. austenite, aluminium)
Measurement of two-phase structures (e.g. ferrite-austenite, ferrite-pearlite)
Various measurement methods: planimetric, linear, circular, Abrams, comparison charts.
Own measurement methodologies.
Measurement according to standards:
- ASTM E112-13 (2013)
- ASTM E1382-97 (2015)
- ISO 643 (2012)
- JIS G 0551 (2013)
- GB/T 6394 (2017)
Cast iron
Analysis of cast iron for the classification of graphite in cast iron according to standards:
- ISO 945-1 (2006)
- ASTM A247-06 (2006)
- JIS G5502 (2007)
We are also able to use measurement of the ferrite/pearlite ratio or your own measurement methodologies.
We'll be happy to advise you.
Ing. Radek Lovětínský
Head of the testing laboratory
What our laboratory offers
In our microscopic analysis laboratory we specialise in the detailed evaluation of materials and their structures. We provide precise measurement of the dimensions of microscopic objects and verify their conformity with drawing documentation. We measure the thickness of various layers – coatings, paints or oxide layers – and evaluate their uniformity. In the field of welding technology we focus on measuring the geometric parameters of welds, analysing their structure and the heat-affected zone.
Scope of tests
- Material structure
- Dimensional inspection
- Grain size
- Weld measurement
- Measurement of layer and coating thickness
- Dimensional inspection of electronics
What We Test for You
Measurement of layer thickness
Optical measurement of thickness of surface layers after prior preparation by grinding and polishing. Measurement of linear layers, circular layers, general layers, calotest.
Weld inspection
Measurement of dimensions of welds according to your internal specifications and standards: fillet, lap, spot and butt weld dimensions, defects.
Material structure
Evaluation of the microstructure on sections of samples.
Which standards we test for you
Since there are countless regulations and standards in the field of materials testing, it is essential to carefully study, for every order, all the standards according to which the customer requires testing. We have access to a portal with standards from which we can download them, so in most cases it is enough to give us the designation of the standard.
Standards
- ČSN EN ISO 1463 Metallic and oxide coatings – Measurement of coating thickness – Microscopical method
- ČSN EN ISO 17639 Destructive tests on welds in metallic materials - Macroscopic and microscopic examination of welds
- ISO 643 Micrographic determination of grain size
- ASTM E112-13 Standard Test Methods for Determining Average Grain Size
How Does It All Work?
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1
Non-binding inquiry
Tell us your testing requirements (e.g. via the inquiry form, email or phone).
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Consultation & requirements specification
We contact you and clarify the test specification and timeline.
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3
Price quotation
You receive a structured price quotation from us.
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Ordering
After your order we reserve the date and capacity.
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5
Delivery of samples
You deliver the samples to us in person or by courier.
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Performing the test
We carry out the test on the reserved date.
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Preparing the test report
After the test we send the test report electronically.
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Follow-up support
We'll gladly go through the test results with you.
Words From Our Clients
„JD Dvořák — a company where the impossible does not exist and where it is not only about work. I am glad to have the honour of working with JD Dvořák.“
Libor Pala
TRL Space Systems s.r.o.
„We have worked with JD Dvořák for a long time in testing, the rental of climatic chambers, and the service and calibration of our equipment. We value the helpfulness and professionalism of the department heads and technicians we are in regular contact with during tests and the work carried out. Our technicians also make use of training in various areas of testing, which provides both an expansion of theoretical knowledge and practical demonstrations.“
Jiri Turek
Google review
„What I greatly appreciate is the personal approach to solving every problem. Whether it concerned specific testing requirements or the need for individual consultation, I was always met with willingness and expert help that led to a smooth and efficient collaboration. For me, JD Dvořák is not only a professional company, but also an excellent partner in research and education.“
„We have worked with JD Dvořák since 2020. Since then we have completed several installations together, and throughout they have provided service and the necessary calibrations, always at the highest professional level. They have also helped us with our special requirements and we can always rely on them. Their approach is not only professional and customer-oriented, but also very human, and the cooperation is always pleasant.“
Jan Špaček
Fresenius Kabi Horatev CZ s.r.o.
„Cooperation with JD Dvořák is at an excellent level, as proven by more than 20 years of trouble-free collaboration.“
Libor Šmíd
TÜV SÜD Czech s.r.o.
„You do good work — thank you for the long-term cooperation.“
Ing. Ivan Vavrík
Bel Power Solutions s.r.o.
„Thank you for the professional cooperation so far. You are a very reliable partner for us.“
Ing. Miloslav Mensinger
Škoda Auto a.s.
Test report
This document contains key information about the tested sample and the course of the test. We provide the report in Czech or English according to your needs.
We issue both an accredited and a non-accredited test report according to customer requirements. The type of report is determined by the chosen testing standard.
- Information about the tested sample
- Place and date of the test
- Equipment used and its calibration status
- Description of the test procedure including laboratory conditions
- Graphical record of the test
- Responsible persons
- Photo documentation of samples before and after the test
Why test with us?
Expertise in the field
Not sure how to test your sample? We'll help. We have years of experience and will recommend the most suitable procedure. And if you already know exactly what you want, we'll be your partner — without unnecessary questions.
Flexibility
Our equipment covers most requirements. If something is missing, thanks to our links with manufacturers of testing technology we can often arrange even specialised equipment outside our laboratory.
Reliability & speed
You can rely on both the equipment and our arrangements. We service and calibrate everything ourselves, so we can react quickly and adapt tests to get you results as soon as possible.
Personal approach
Every job is unique to us. We always try to understand your needs and tailor the service exactly to what you expect.
We'll be happy to advise you.
Ing. Radek Lovětínský
Head of the testing laboratory
Frequently Asked Questions
We analyse a wide range of metallic and non-metallic materials, including steels, alloys, plastics, ceramic materials and composites. The choice of method depends on the type of material and the required output.
We determine layer thickness using cross-sections and microscopic measurement. The results provide information on the uniformity, adhesion and any defects of the layer.
When evaluating welds we follow standards such as ČSN EN ISO 17639, which define procedures for the visual and microscopic examination of welded joints. The results include dimensional parameters as well as the weld structure.
Yes, we offer comparison of the actual dimensions of microscopic features with drawing documentation. We carry out measurements with high accuracy and deliver the results in the form of a report.
