News From CSC Scientific

What I Didn't Know About Mixing

hlevi@scientificgear.com (Hank Levi) — Sat, 16 Aug 2025 20:57:55 GMT

Shear Rate - What is it? Should You Care? All About Viscosity

hlevi@scientificgear.com (Hank Levi) — Mon, 21 Jul 2025 18:00:00 GMT

Shear Stress - Shear Rate

Viscosity! If you ever think about it, what do you see?

Which Type of Tensiometer do I Need?

cjang@cscscientific.com (Cho Jang) — Tue, 29 Apr 2025 19:10:05 GMT

As followers of these rants know, we manufacture and distribute tensiometers. As a tensiometer manufacturer, we are often asked, “if I am going to replace my tensiometer, which one should I get?”

Let's explore the alternatives and compare their respective capabilities.

Enhancing QC with Mid-Point Sieves Precision in Particle Size Analysis

cjang@cscscientific.com (Cho Jang) — Wed, 02 Apr 2025 19:13:02 GMT

The Need for Mid-Point Sieves

ASTM and ISO establish standards for the acceptable range of openings in a wire mesh sieve. For larger mesh sizes, the variation between the largest and smallest acceptable openings has little impact on sieve performance. However, as mesh sizes decrease, the potential for performance differences between sieves becomes significant. These discrepancies, especially when an old sieve is replaced in a master stack, can lead to problematic QC data. Mid-Point sieves can help alleviate this issue.

What is a Mid-Point Sieve?

A mid-point sieve has had the mesh inspected after mounting. The sieve is then selected as a mid-point if the results give tolerances that are in the middle of the ASTM standard.

Understanding the Role of Platinum in Du Nouy Tensiometer Rings

cjang@cscscientific.com (Cho Jang) — Mon, 12 Aug 2024 21:53:51 GMT

Discover the significance of platinum in du Nouy Tensiometer Rings and its impact on accurate surface tension measurements.

Instrument Accuracy? Is it only an illusion?

cjang@cscscientific.com (Cho Jang) — Mon, 12 Aug 2024 20:57:22 GMT

Regularly I’m asked the question; “How accurate is this moisture balance?”

The questioner asks for the answer in terms of percent (%) moisture. When I answer “it depends”, I always get the unspoken response, “Why did I ask this stupid idiot?”

Absolute Measurement

When inquiring about the precision of measurements such as weight or temperature, the responses are clear-cut and tied to the accuracy of the instruments. For instance, 25 grams or 50 degrees with a margin of plus or minus (+/-) 0.1 gram or 1/2 degree.

Percent is A Relative Measurement

When questioning the accuracy of your percentage reading, the answer can be quite complex. This complexity arises from the fact that percentage (%) is a relative measurement. Take, for example, the outcome of a Loss on Drying (LOD) moisture test, which is heavily influenced by the size of the sample used.

To better grasp this concept, consider how the result of an LOD moisture test is derived. It involves subtracting the weight of the sample at the end of the test from its initial weight, and then dividing this difference by the original weight of the sample. This calculation ultimately yields a % moisture reading.

Sample Size

The upcoming analysis will shed light on the impact of both sample size and instrument precision. We will delve into a sample containing 23.5% moisture, examined using an electronic LOD moisture balance with a sensitivity of 0.001 grams and a repeatability of +/- 0.005 grams.

Sample Analysis

"Certify vs. Calibrate Sieves: Which Should You Do?"

cjang@cscscientific.com (Cho Jang) — Fri, 21 Jun 2024 21:25:13 GMT

The ongoing debate between the value of a sieve certification process and sieve calibration has long intrigued me.

Static Electricity and Sieves: No Problem -- Maybe

cjang@cscscientific.com (Cho Jang) — Fri, 21 Jun 2024 20:29:21 GMT

I'm sure many of you have felt the jolt of static electricity when walking on a cozy wool rug in the winter and then reaching for a metal door knob. This same static electricity can cause chaos in your sieving process.

Evolution of Sieve Testing: Ancient Egyptian Ways to Modern Methods

cjang@cscscientific.com (Cho Jang) — Thu, 20 Jun 2024 21:25:03 GMT

The Importance of Food Texture Analysis: Sensory Experience

cjang@cscscientific.com (Cho Jang) — Thu, 25 Apr 2024 20:36:13 GMT

While savoring a delicious meal, the age-old saying "It's all about the taste, not the appearance" often resonates. The visual aspect simply enhances the overall flavor experience. When a dish both looks and tastes exceptional, diners are quick to give it high praise.

Food purchasers and food manufacturers understand that taste isn't the only factor at play. If a food product lacks the right feel or appeal, the initial bite may also be the final one. They require an objective measure of these sensory aspects that is both consistent and reproducible. These sensory aspects fall into a category called texture.