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6-Month Shelf Life Guarantees 

Free Quotes Within 3 Days 

Over 38 Years of Experience

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RAPIDTEST 38®

North America and Mexico

6-Month Shelf Life Guarantees 

Free Quotes Within 3 Days 

Over 38 Years of Experience

Request Lorem Epsom

Hero Request Form

Get Accurate Surface Tension Testing You Can Trust

When you need precise surface tension testing for your materials, RAPIDTEST 38® from Lotar LLC delivers the reliability you're looking for. As the original manufacturer of test inks and test pens, we've been providing quality testing solutions throughout North America and Mexico since 1989. Our products help you ensure proper adhesion and coating performance for your applications. Reach out to us for your free quote today.

Surface Tension Testing Matters for Your Operations

When you're printing, coating, or bonding materials, knowing the surface energy of your substrates makes all the difference. RAPIDTEST 38® helps you verify that your surfaces are properly treated and ready for processing. 


Here's why accurate testing is essential:

  • Ensures ink and coating adhesion
  • Prevents production failures and waste
  • Confirms corona or flame treatment effectiveness
  • Maintains consistent quality control standards

Our testing solutions help you catch surface tension issues before they become costly problems, keeping your production running smoothly.

Why Choose Lotar

Lotar stands behind every RAPIDTEST 38® product we manufacture. As a family- and woman-owned business with nearly four decades in the industry, we understand what quality means to your operations. 


Here's what sets us apart:

  • Free quotes delivered within 3 days
  • Nearly 40 years of testing expertise
  • Six-month shelf-life guarantee on pens and inks
  • Working with Arcotest GmbH, the original manufacturer, since 1989


When you choose us, you're partnering with the company that invented these testing methods and continues to perfect them.

arcospray®38

Contact Us

Ready to ensure your materials meet the surface tension requirements for your applications? Lotar is here to provide the RAPIDTEST 38® solutions you need. Our team will work with you to determine the right testing products for your specific requirements, and we'll get you a quote fast.


Contact us today to discuss your surface tension testing needs.

Messung des Dyne Levels mit arcotest® BLAU

Surface energy, testing with the test pen

arcotest® RAPIDTEST 38®, nachfüllbar

Testtinte arcotest® ORGANIC

arcotest® Determination of the surface tension

Lotar LLC

arcotest® Determination of the surface tension

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