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Monday, April 27, 2015

A Story from the Testing Lab: What is the top of the Sheffield Roughness scale?

Sheffield Measurement Head
According to TAPPI Test Method T 538, "Roughness of paper and paperboard (Sheffield method)", "This method is a measurement of the air flow between the specimen (backed by flat glass on the bottom side) and two pressurized, concentric annular lands that are impressed into the sample from the top side.  The rate of air flow is related to the surface roughness of paper or paperboard."

Older Sheffield testers had three tubes for the different recommended ranges:
  + Tube #1 (SU) 170 - 400
  + Tube #2 (SU) 56 - 170
  + Tube #3 (SU) 0 - 56

Modern Sheffield testers just provide a digital display of the current Sheffield roughness measurement.

In the Summary, the Test Method states: "The effective measuring range of this method is from 0 to approximately 445 Sheffield units." In the description of the Apparatus, the method defines "An air flowmeter, having the capability to measure the range of flow required for the samples to be tested. A range of 0 to 3400 mL/min (0-400 SU) is recommended."

Generally speaking, most modern instruments will display a value with the wording "out of range" or a flashing display if the values are above 400 or 420 SU.

Friday, April 24, 2015

TAPPI Awards Fellows for 2015

In association with TAPPI PaperCon '15, April 19, 2015, TAPPI hosted a luncheon which recognized the TAPPI Fellows class of 2015.  TAPPI (Technical Association of the Pulp and Paper Industry), founded in 1915, has grown into the world’s largest professional association serving the pulp/paper, nonwovens, converting and packaging industries. Being named a TAPPI Fellow is quite an accomplishment. Less than one percent of TAPPI’s members have this title. It is a designation given to individuals who have made extraordinary technical or service contributions to the industry and/or the Association.
Jerry and Todd Popson at the Fellows Luncheon
  • Michael Exner, Retiring Director and TAPPI Member since 2011
  • Kerry Figiel, International Paper, TAPPI Member since 1993
  • Carl Houtman, US Forest Products Laboratory, TAPPI Member since 1998
  • Seyhan Nuyan, Metso Automation, TAPPI Member since 1987
  • Gary Nyman, International Paper, TAPPI Member since 1988
  • Todd Popson, Technidyne Corporation, TAPPI Member since 1993
  • Clayton Teague, Retiring Director and TAPPI Member since 2011
  • Junyong Zhu, US Forest Products Laboratory, TAPPI Member since 1994
Jerry Popson, Founder and Chairman of Technidyne Corporation, was recognized as a TAPPI Fellow in 2012.

Monday, April 20, 2015

Optical Calibration: What is OPAL?

I am in Atlanta this week for TAPPI PaperCon and ISO TC6 (pulp, paper and paperboard) meetings. I am also participating in OPAL (Optical Properties Authorized Laboratory) meetings.  The OPAL is made up of representatives of each of the Authorized Laboratories for producing and distributing IR3 standards for optical measurements according to ISO 2469 for the measurement of ISO 2470, 5631, 11475, 11476, and 22754 (and others).  This group is led by the Chairman of ISO TC6/WG3 (optical properties).  Representatives are from:
  • Technidyne Corporation - USA
  • Innventia - Sweden
  • CTP - France
  • FPInnovations - Canada
In order to maintain a high level of agreement among the labs, they participate in monthly inter-laboratory comparisons. This means the labs produce and ship standards to each of the other labs each month. They read the standards that were received and generate a series of tables showing the monthly comparisons of spectral reflectance (minimally 400-700 nm), fluorescent (UV Level D65 & C) and non-fluorescent levels.. This data is then maintained on a common website for later analysis.  This aids the labs in detecting differences or changes among the group.

In regularly scheduled meetings (like the one in Atlanta, GA), each lab reports and discusses any observed trends, changes or differences. This helps build a cohesive group for issuing standards. The idea is to provide the best agreement among customers that receive standards from any of the Authorized Labs. A new report will be issued by the OPAL in the near future which illustrates the inter-laboratory reproducibility.

To learn more about Technidyne's calibration process and materials, contact Nick Riggs and see our website Technidyne Laboratory Services

Technidyne...for good measure. Visit us at

Thursday, April 16, 2015

TAPPI PaperCon 2015 (Atlanta): What's New at Technidyne?

Next week TAPPI PaperCon '15 is being held in Atlanta, GA April 19-22, 2015.  Booth 325 will have a variety of products from Technidyne and it's partners such as Emtec, Techpap and ACA.

Technidyne will have a variety of new including the TEST/Plus line of instruments and the Color Touch™ X. 

The first instrument in a new line of stand alone instruments, the TEST/Plus Gloss instrument (seen at the right) will be on display.  The TEST/Plus line utilizes a tablet user interface and allows customers to purchase software features such as statistics through an App.  Other instruments in the TEST/Plus line will be released in the coming months.

Color Touch™ X
A new generation of ISO-conforming spectrophotometer with expanded wavelength capability beyond the normal visible spectrum. Touch screen user interface, built-in swing-in standard, automatic calibration and trending capability. Contact Rodger for more information.

The best way to find out about these things is to follow this blog, see updates on our websiteTechnidyne on Facebook and see us at trade shows around the world.  Some of the other upcoming trade shows are:
Please check out our ever-changing Technidyne Website.

Monday, April 13, 2015

FPAutoSpeck™: Stickies Measurement

The FPAutoSpeck which was developed by FPInnovations, screens and measures heavy and light stickies. Historically, most people use TAPPI T277 for stickies measurement. However, this process is very time consuming and subjective. This leads to poor repeatability. It also does not provide information quick enough to make adjustments to the process when 'stickies storms' or other disruptions occur. The FPAutoSpeck can be run manually or connected with an auto-sampler to provide automatic sampling and testing.  Below is a brief comparison of the FPAutoSpeck with TAPPI T277.

Some advantages to the FPAutoSpeck™ compared to TAPPI T277:
  1. Automatic testing
  2. Four measurements per hour
  3. Objective & repeatable  

Studies are ongoing. Please let us know if you want to test some samples or have questions about applications.

Thursday, April 9, 2015

Introducing - Color Touch™ X

Color Touch™ X is the next great development from the most trusted name in the world for optical measurements in the Paper Industry, Technidyne!

In May 2015, Technidyne will be in production of the newest technology in color measurement for the Pulp, Paper and Allied Industries, the Color Touch™ X.

Color Touch™ X
A new generation of ISO-conforming spectrophotometer

  • Xpanded wavelength capability beyond the normal visible spectrum
  • Xtremely tight measurement resolution
  • Xtraordinary repeatability and reproducibility
  • Xceptional touch screen user interface
  • Xclusive, built-in swing-in standard
  • Xpress automatic calibration
  • Xplosive trending capability
  • Xtensible measurement capabilities
  • Xquisite new look and design
  • Xcellent reputation for quality
Orders have already been received from all around the world for the most anticipated improvement in optical measurement, Color Touch™ X.  The next in the line of color instruments provided by the most trusted name in optical measurement in the Paper Industry, TECHNIDYNE!

Contact Technidyne for more details.

Monday, April 6, 2015

Fluorescence: Greening

(top) Non-fl & (bottom) Fl under black light
Office lighting

At low concentrations of FWA's (Fluorescent Whitening Agents), each molecule is isolated such that the local environment around the FWA consists of the paper and paper products.  As concentrations increase, all the available attaching sites become full and the FWA molecules begin aggregating and reacting with other FWA molecules.  This results in altering the fluorescing effectiveness of each molecule.  The net result is that the quantum efficiency of the FWA decreases.  This means that the increase in fluorescing effect due to each added unit of FWA decreases.  Therefore, the addition of more FWA's will result in an increase in TOTAL fluorescence, but the wavelength of the emission peak will shift toward the green.

More work still needs to be done to better understand when the greening limit is being approached.  This may result in a measurement that will predict greening before it is too late.

Thursday, April 2, 2015

Technidyne Receives Above & Beyond Award

At the annual awards dinner on March 13, 2015, Technidyne received the Above & Beyond Award.  This award is presented by ESGR State Committees to recognize employers at the local level who have gone above and beyond the legal requirements of the Uniformed Services Employment and Reemployment Rights Act (USERRA) by providing their Guard and Reserve employees additional, non-mandated benefits such as differential or full pay to offset lost wages, extended health benefits, and other similar benefits.  The award is given in limited numbers by each state and is considered a prestigious honor.

Technidyne was nominated by US Sales Manager, Rodger Segelstrom, and the award recognized VP-Sales & Marketing, Tom Crawford, and CEO, Todd Popson.

Technidyne had previously been recognized as a Patriotic Employer by the Office of the Secretary of Defense.