LECO Australia Latest News (Page 3 of 48)

Have you ever let long-cure epoxy mounts cure overnight, only for the setscrew to push into the mount when you went to load it into your grinder/polisher’s fixed specimen holder? When the epoxy is soft, the specimen isn’t secure in the mount or in the specimen holder, and proper grinding and polishing becomes impossible. The eight hour cure time for long cure epoxy means you can’t just whip up a new one; if something goes wrong, you’ve effectively lost an entire day as the replacement also needs eight hours to cure.

But if you left your mounts to cure overnight, shouldn’t that have been more than enough time? What could have gone wrong?

Cracks in your mount are never a welcome sight. While a scratched specimen doesn’t always have a cracked mount, a mount with radial cracks is far more likely to cause a future scratched specimen. While we covered the scratches in an earlier tip, we can’t ignore the cracks.

There is a certain sort of frustration that comes with putting a completed multi-step metallographic preparation beneath the microscope, taking a look, and seeing a discolored or stained surface. While a few types of stains can be ignored, many stains mean something went wrong during the preparation.

In this era of incredible plug and play technology, a Video Measuring System or reticle disc for your microscope eyepiece feels like it should be enough to begin accurately measuring metallographic samples, but if you skip your calibration steps, your results could be wildly inaccurate.

98% of the world's soybean meal is used as animal feed, principally as a protein supplement. With the importance of protein in animal growth and development, knowing what's in your soybean meal is vitally important. There is more to protein than the crude protein concentration number, however. If an animal can't digest the protein, if it isn't a 'soluble' protein, then it doesn't actually provide the nutritional value needed. LECO's FP828 is capable of both total and soluble protein analyses.

The first Time-of-Flight (TOF) mass spectrometer was proposed in 1946, and the design has been refined and iterated upon ever since. With an unlimited mass range visible in each spectrum and a high spectral generation speed, the advantages of TOF mass spectrometry were immediately clear. Though the instruments improved, they did eventually hit physical limitations that restricted the resolving power. More work had to be done.

For decades, LECO's supply catalogs have gone hand-in-hand with the instruments they support. With everything from consumables to accessories to spare parts, the catalogs are key additions to a LECO laboratory. The newest catalog updates for our analytical products have reformatted these workhorses to make them even more useful than ever before.

Thermogravimetric analysis (TGA) first started in the early 20th century, and while the technology has advanced, the basic principles remain the same. With TGA, the rate of change of reactions in the chemical and physical properties of materials as functions of temperature or time is what is used to assess the properties of the sample materials. Most TGA these days is done with either micro TGAs (using milligram-size samples) or macro TGAs (using gram-size samples).

Charred oak barrels that were once used to age bourbon have found new life as they get repurposed for a variety of foods and beverages to add a new flavor profile to familiar delicacies. But how much can an old bourbon-soaked barrel change the chemical makeup? LECO used ChromaTOF® Tile to differentiate regular and barrel-aged maple syrups and quantify the difference.

When magnification was as simple as one eyepiece and one objective, finding your total magnification was as easy as multiplying the two values together. The addition of film brought a third value to the equation, but the result remained a static, concrete number.

And then along came the computer.

With a huge variety of video camera chips and monitor sizes and camera couplers and screen resolution, suddenly viewing something at 500X magnification became much more challenging. There was no way to take into account all of the permutations possible. For example, even if two systems were otherwise exactly the same, but one had a 23" monitor and the other had a 24" monitor, the magnification would be different.

It was time to replace the magnification focus with a different way of looking at things: the Field of View (F.O.V.)