Sacrificial Soils in Critical Cleaning
By John B. Durkee, Ph.D., P.E.
Sacrificial soils are materials added to a soiled surface to help that surface become less soiled.
All the News That’s Fit to Print...
By John B. Durkee, Ph.D., P.E.
This column reports on three unrelated outcomes about which you need know to manage critical cleaning work, and points out their significance.
On the Quality of Cleanroom Wipers
By Sandeep Kalelkar, Ph.D., Jay Postlewaite, Ph.D.
In assessing the quality of cleanroom wipers, it is vital to consider the consistency of their cleanliness as an integral property that allows the expected performance measures to be achieved.
In Development of Technology, Patience is Key
By John B. Durkee, Ph.D., P.E.
Most of my industrial career with a large chemical company was spent doing development work.
GOOGLE(TM) is Not Enough
By John B. Durkee, Ph.D., P.E.
Google can find targeted content in articles, books, and other material. I use it every day to answer specific questions, and to find specific references and information.
Superfluous or Essential: Part I
By Barbara Kanegsberg, Ed Kanegsberg
An art exhibit in London inspired us to ponder changing views about the definitions and implications of soil, residue, contamination, and especially the design and operation of controlled environments.
CO2 Snow-jet Cleaning in Micro-production
By Doris Schulz
More than just surface-clean
Do Vacuum Pumps Actually Pump Vacuum?
By John B. Durkee, Ph.D., P.E.
Current industry activity is strong in production of enclosed cleaning machines which allow cleaning solvents to be used under vacuum conditions.
Hazards of Aerosol-Dispensed Cleaning Agents: Flammability
By John B. Durkee, Ph.D., P.E.
Many doing critical cleaning have used aerosol-dispensed cleaning agents to reach certain portions of valuable surfaces so that the cleaning agent could do its “magic” and be removed with soil by a worker using a fabric wiper.
Respiratory Hazards of Aerosol-Dispensed Cleaning Agents
By John B. Durkee, Ph.D., P.E.
Many doing critical cleaning have used aerosol dispensed cleaning agents to reach certain portions of valuable surfaces so that the cleaning agent could do its “magic” and be removed with soil by a person using a fabric wiper.
Design for Cleaning, Part 2: Good Words or Good Idea?
By John B. Durkee, Ph.D., P.E.
Design for Cleaning (DFC) is an approach to management of operations so that one seeks compromise in the part design or position within the cleaning machine to enable reduction of defects due to inadequate cleaning.
Design for Cleaning, Part 1: Good Words or Good Idea?
By John B. Durkee, Ph.D., P.E.
This is a topic on which I have previously written and provided consulting service. I think it’s a valuable approach. Some think its nonsense or just common sense.
Can There Be Life Without Exposure Limits?
By John B. Durkee, Ph.D., P.E.
This column updates the May 2010 column, and January 2011 column in which I reported on a whipsaw (a lose-lose situation) faced by the U.S. Department of Labor’s Occupational Safety and Health Administration (OSHA).
Point of View Matters
By John B. Durkee, Ph.D., P.E.
Born without a right leg, Tony Robles is a champion college wrestler from Arizona State University. In 2011, his senior year, he may well win the NCAA collegiate championship.
OSHA's Generic Escape from a Whipsaw?
By John B. Durkee, Ph.D., P.E.
This column updates the May column, in which I reported on a whipsaw (a lose-lose situation) faced by the U.S. Department of Labor’s Occupational Safety and Health Administration (OSHA).
The Basics of Non-Evaporative Parts Drying
By John B. Durkee, Ph.D., P.E.
In last month’s column about the basics of drying, we covered removal of water from surfaces by evaporation.
Basics of Isolator Cleaning
By Dr. Thomas H. Treutler
Proper decontamination and cleaning of isolators is critical to the long term success of materials produced in controlled environments.
Why The Swab Matters In Cleaning Validation
By Sandeep Kalelkar, Ph.D.
In recent years, increased emphasis has been placed on the development of validated and robust cleaning protocols.
Back to Basics - Who is to Blame for Critical Cleaning
By John B. Durkee, Ph.D., P.E.
For most managers of critical cleaning operations, drying is synonymous with evaporation.
MSDS - Necessary But Not Sufficient
By Barbara Kanegsberg, Ed Kanegsberg
If you think that a Material Safety Data Sheet (MSDS) provides adequate information to determine if a process chemical could be hazardous to your product, think again.
The Basics of Rinsing - A Case Study
By John B. Durkee, Ph.D., P.E.
A familiar client called. He wanted me to be at his manufacturing plant ASAP to inspect his rinsing system, to tell his management that it was fine, and to stop bugging him about it. He said he was doing things the right way.
Who Is To Blame For Critical Cleaning?
By John B. Durkee, Ph.D., P.E.
This is one of those columns you have to read (and write) every couple of years or so.
Materials Compatibility Basics
By Ed Kanegsberg, Barbara Kanegsberg
You Know Materials Compatibility Problems When You See Them
Back To Basics - How Cleaning Really Works, Part II
By John B. Durkee, Ph.D., P.E.
In the last C4 column, I started my contribution to compliance with Controlled Environment’s 2010 editorial calendar by communicating some of the basics behind cleaning science.
Point of View: Facilities Cleanliness Requirements
By Scott Mackler
When the solution is simple, God is answering. - Albert Einstein