MIL-STD 202, Method 215K

Silver Fox is a leading UK manufacturer of labelling solutions and has been successfully supplying to the Energy, Oil & Gas, Power, Rail and Data & Telecom industries worldwide for over 30 years.

As a company, Silver Fox strives to provide complete solutions to labelling equipment and cables in all sectors. With the key drivers of quality and durability, time-saving and prompt delivery.

One of the ways Silver fox demonstrate our commitment to quality is by testing our solutions at independent laboratories, for a variety of critical and extreme conditions.

One such test is the MIL-STD 202, Method 215K which prescribes a chemical wash testing procedure, to verify that markings or colour coding will not become illegible or discoloured on the parts when subjected to solvents and processes normally used to clean solder flux, fingerprints, and other contaminants from printed-wiring and terminal-board assemblies, etc. The test is carried out both by soaking, and by rubbing with a toothbrush to test abrasion resistance. Four solvents are employed.

  1. 1 part (by volume of isopropyl alcohol (ACS) reagent grade or TT-10735, grade A or B and 3 parts (by volume) of mineral spirits per MIL-PRF-680), type 1, or three parts (by volume of a mixture of 80% (by volume) of kerosene and 20% (by volume) ethylbenzene.
  2. Terpene Defluxer
  3. 42 parts (by volume) of water, 1 part (by volume) of propylene glycol monomethyl ether 1 part (by volume) of monoethanolamine)
  4. Isopropyl alcohol (ACS) reagent grade or TT-1-735, grade A or B

CEO Nick Michaelson commented “The 4th part of the test with Isopropyl alcohol was introduced to the standard in 2018, thus upgrading the test to a higher, more demanding level. We believe that Silver Fox may be the first company globally in our field to successfully pass this new stricter standard”

Since Silver Fox labels are being used more and more in the Aerospace and Defence sectors, the decision was taken to undertake independent testing.

Nick Michaelson went on “Importantly, although it is possible to self-certify for this test. We also took the view that it is far better reflection of our commitment to quality and transparency, if we commissioned a properly approved and independent test laboratory to conduct these tests.”

The performance was evaluated by measuring changes in visual observation after exposure. All labels tested were intact after being exposed. The characters on the labels were all clear, not blurred – Printed words on the labels remained legible and the actual labels had not deteriorated or discoloured.

Labels successfully tested include:

Legend® Premium Heatshrink and LSZH Heatshink in both ladder and roll format in White and Yellow.
Fox® labels in White and Yellow
Legend® LNST Non-shrink in White and Yellow
Prolab® Raised Profile in Yellow, White and Silver
Endurance™ Warning Tape, Orange, and Yellow
Legend® Heatshrink in Black (with white text) and Red

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