A simple experiment to show surface tension is to take a dish of water and sprinkle pepper in it. Then drip a single drop of dish soap in the center and all the pepper will move away from the center to the edge of the dish.
The only stupid question is one that isn't asked. What's happening is the washing up detergent is breaking the surface tension of the water which allows for meduims such as glue or paint. for example, if your applying flock to a peice of terrain apply the wet water first and then apply your watered down PVA and it will soak through all the different layers and give you a secure bond and the flock won't be falling off. I hope that helps, feel free to throw anymore questions you might have.
If i dont have this Fairy brand of dish liquid could i see dawn dish detergent? if its different radio, what would the radio to water be? I think the dawn dish liquid is a lot more concentrated.
it should be fine, you'll get more bang for your buck as dishwasher rinse aid is more concentrated than normal washing up detergent. I've never tried it myself though, give it a try and let me know the results.
Rinse aid is much much better than dish soap. It doesn't have most of the other ingredients that dish soap is made with. It doesn't create as much suds, ... and it is literally the part of the dish Soap that aids the flow, without all the tons of other stuff in it, that isn't needed at all. It's much safer to use in paint, than dish soap. Many people don't know about this
