If you have deduced from the preceeding few blogs that heat is one of the major factors in drying, you are right. But before we talk more about heat, let’s “set the stage.” Heat is that stuff that increases temperature of a substance when added and reduces temperature when absorbed. Temperature is the level of …
In reading the last couple of blogs it would be easy for the reader to come to the conclusion that the addition of heat is all that is needed to dry things. It would be nice and easy if that was the only consideration. The fact is that evaporative cooling is working against us in …
In the preceding blog, we learned that relative humidity of air is affected by temperature. Although I really didn’t say it, I’m sure readers have come to the conclusion that lower relative humidity will result in air which is “hungry” for water. Air that is at a low relative humidity, then, is beneficial to drying. …
I first talked about drying a long time ago in the blog called “Don’t Forget Drying.” In that blog, I stressed the importance of drying as a part of the cleaning process. In some cases, changes in the cleaning process can affect drying but, for now, let’s just concentrate on drying. Drying simply means removing liquid …
A few days ago, one of our customers asked one of our sales people what would seem like a very simple question. The question, in paraphrase, was – – “Do you know the relationship between ultrasonic frequency and the ability of ultrasonics to clean within a certain sized orifice.” Being a bit rushed when I received …
As a leading ultrasonic manufacturer, we are often asked to manufacture large, industrial ultrasonic cleaning systems producing a particular ultrasonic power density based on laboratory trials. In fact, it may not be appropriate to base the watts per gallon requirement for a large industrial application on those found effective on a laboratory scale. A paper at the following …
Solvents are a bit difficult to understand for a number of reasons. Even for someone who has worked with solvents as much as I have, the permutations of solvents, their combinations and their capabilities are bewildering. But, let’s start with the simple stuff. A solvent dissolves what is called a solute. In what is probably the …
It doesn’t matter if you call it soap, solvent, surface preparation, or whatever, chemistry is an important part of nearly every cleaning process. The first purpose of the chemistry in a cleaning application is to either dissolve the contaminant or, using some other mechanism, to break the attachment that the contaminant has to the substrate. …
Liquid motion within and around a submerged part is one of many ways of enhancing both cleaning and rising processes. In an earlier blog, The BIG Four agitation was described as one of the “big four” variables having a major impact on cleaning and rinsing. In simple terms, agitation means moving the processing liquid relative to …
Preceeding blogs have discussed de-ionized or “DI” water, its benefits and its uses at some length. Today’s blog will discuss “Reverse Osmosis” water otherwise known as “RO” water. RO water is like a second cousin of de-ionized water. In the de-ionization process, potentially ALL ions are removed resulting in water that can approach the ultimate limit for pure …
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