Originally Posted by TOGWT
I have to respond to this because you posted something very similar on detailing world (I am not a contributor there). Yes, many detergents contain agents which inhibit water spotting. Unfortunately alcohol alkoxylates don`t really fall into this category. Sodium - what? Sodium ions? Sodium ions (counter ions) are in practically everything that has water in it and are most definitely not sheeting agents.
Many of the sorts of agents you refer to will specifically increase gloss, not decrease. It is agents like alcohol ethoxylates which will decrease gloss, primarily due to failure to form uniform films. In fact you will find that many car wash products contain the gloss/sheeting type agents you refer to - it is far from unique to dish washing liquids.
Originally Posted by TOGWT
That is pure conjecture with regards to the abrasive character. SLES is ubiquitous in shampoos and you will find it in many vehicle cleaning products and I believe it is actually used in Car pro eraser so you cannot accuse it of being abrasive there. DDBSA and NaOH react to give you one of the most important cleaning surfactants out there - a sulphonate. Lets look at this logically. You maybe use 200:1 dilution, the wash soaps are rarely above 30% active so that basically means about 0.1% activity in your bucket. Now lets look at something like Iron-X - it is something like 30% active and you apply it neat. It is probably 300x more `active` and it is little more than a salt. So, if your suggestion was correct about washing up liquid, Iron-X and similar should surely be like sandpaper. Only they are not.
In solution, all of these components are ions. They are sub nano and of no concern from an abrasive perspective. Taking DDBSA and similar surfactants - do you know what happens when they dry out? They do not dry into crystals, they dry into a sticky mess. Long before you get crystals, you will get a sticky residue and you won`t be buffing it because your cloth will stick. They don`t dry out in the way NaCl does from seawater! But the concentration is of paramount importance here. With the high dilutions used for hand wash product there is simply so little material present that what you are saying is scaremongering. By all means make the argument with other products, have a fight about De-ironiser and the manufacturer suggesting safety about it drying in situ but enough with it on hand washing products.
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