Frequently asked questions
The test kits are always in stock. In this way we can deliver them quickly. We will send the package within two working days after receiving the order or payment. Delivery time depends on the country to which it is delivered. We deliver to countries all over the world.
We are able to send the packages with the test kits worldwide.
We are proud to be the developers, manufacturer and supplier of our test kits. Therefore, the country of origin of the test kits is the Netherlands.
We use the Delivered At Place (DAP) Incoterm.
This test kit can be used to detect the presence of chromium-6 on various surfaces, such as paint layers and on metals.
Old coats of paint may contain chromium-6 to protect the metal from rust. The test kit is therefore often used to test whether old layers of paint are safe to sand or grind. Heated metals, often in combination with anti-seize agents, often contain chromium-6 on the surface. The test kit is therefore often used for testing heated components in gas turbines, wind turbines, engines, etc.
The test kit includes clear instructions and safety data sheets. The test kit can therefore be used by any adult person, and is easy to perform. Of course the safety precautions should be observed (wearing goggles and gloves) as described in the manual.
This can be done in a simple way with our TK11 test kit:
- The moistened test swab should be rubbed over the surface of the stainless steel.
- If the test swab turns purple, it indicates the presence of chromium-6 on the surface,
- If the test swab remains orange, it indicates that no chromium-6 is present.
For more information see a report about our investigations on the detection of chromium-6 in heated lubricants on stainless steel >>
This can be done in a simple way:
-The paint layer should be lightly sanded beforehand.
-The moistened test swab should then be rubbed over the paint layer.
-If the test swab turns purple, it indicates the presence of chromium-6,
-If the test swab remains orange, it indicates that no chromium-6 is present.
Chromium-6 compounds, or 'chromium-6' in short, are very harmful to human health. These compounds often are part of anticorrosion paint layers. Chromium-6 compounds can also be formed after heat treatment of chromium-containing metals such as stainless steel, for example in heated machine parts of a (wind) turbine or engine. Heating can also take place during grinding or welding. The formation of chromium-6 on metals will occur faster if lubricants (known as 'anti-seize paste') are used to prevent the seizing of bolts or parts. Often these heated lubricants look yellow/green (see photo of bolt and nut on the left). Other examples of chromium-6 on metals are zinc chromate coatings (see photo on the right). Detection of these chromium-6 contaminations on metals is important to prevent exposure to chromium-6.
Example of a stainless steel 304 (A2) bolt and nut with anti-seize paste after heat treatment. The formed yellow/green chromate is clearly visible. The test swab of the TK11™ Chromium-6 Detection Test Kit clearly turns red/purple, indicating that chromium-6 is present.
Example of a zinc chromate coating on a hinge of a fence.
You can easily do the test by yourself
Mechanics, metal workers, painters or quality employees can use our Test Kit easily, quickly and on the spot, by rubbing a moistened test swab over the metal surface. A red/purple discolouration of the test swab indicates the presence of chromium-6, whereas the test swab remaining orange indicates that no chromium-6 is present.
1. In the case of paint layers: Pre-sanding
Before testing a paint surface, lightly sand it with clean sandpaper. This will expose any chromium-6 present in the paint, resulting in a more intense purple discoloration of the test swab. (Pre-sanding is not required for testing chromium-6 on heated metals).
2. Properly moisten the test swab
You should moisten the head of the test swab well in advance with about 6 drops of test liquid so that the head of the test stick is completely wet.
A good wetting leads to the best test results because then there is enough liquid in which the chromium-6 from the paint can dissolve. The bottle from the test kit contains enough liquid.
3. Make sure you have good lighting.
With proper lighting, look at the discoloration of the test rod. For example, outside with daylight, or inside with bright artificial light. Usually the presence of chromium-6 result in a distinct purple discoloration. But a light red/purple discoloration of the test strip also indicates that chromium-6 is present in a lower concentration.