As I was writing the recent post about gravimetric Millipore testing it occurred to me that I was trying to boil a good-sized part of a 180+ page document into 500 or so words. It also occurred to me that many people don’t have the time for or interest in reading endless pages of specifications …
Millipore testing is all about evaluating cleanliness based on the presence of particles or other solid, non-soluble contaminants. In general, it can not be used to detect the presence of hydrocarbons or other contaminants which will be solubilized in the extraction process. The results of Millipore testing are generally expressed by weight using gravimetric analysis …
I just spent a couple of hours re-reading several of the ISO specifications related to “Millipore” testing including ISO16232-3 and -7. I put the word Millipore in quotes here because although these are normally called Millipore specifications, none of them mentions the word Millipore. (Millipore happens to be the name of a company that developed …
Until recently, I was only able to theorize about the mechanism involved in the perforation of aluminum foil by ultrasonic cavitation. I no longer have to theorize! My theory had always been that perforation of aluminum foil was due to the repeated flexing of aluminum foil as cavitation implosions occurring on opposite sides of the foil …
Using the right amount of chemistry is important to successful industrial cleaning. Since there is no standard convention for expressing the amount of chemistry to use, it sometimes takes a little effort to sort things out. Chemistry is supplied in either liquid or powder form with several different conventions for each. Let’s look at liquids …
Drying is the last and often a critical part of a cleaning process. In many cases it is also the most time and energy consuming. It is often the most difficult part of the process to specify and control. Although there are several drying technologies available, blowing with hot air is simple and by far …
With its well-deserved credentials for chemical resistance and durability, stainless steel and particularly 316 grade stainless steel is a “go to” for the fabrication of ultrasonic cleaning tanks. Although it performs well in most applications, there are still those where stainless steel has its limitations. Stainless steel achieves its “stainless” characteristic by developing a very …
Hi, I’m John Fuchs and I’ve been asked by CTG to come back from the depths of retirement to host the NEW CTG Clean Blog. Many of you know me as the “slinky guy” or just “guru.” In over 40 years working with hundreds of users and a variety of industrial cleaning technologies I’ve accumulated …
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