Nice buy on the rain lamp! Photos to come? I've not seen one verifiably from Italy before; in the US they used to have a reputation for being an Italian thing, through they were actually invented in the USA.
I'm a novice at this stuff, but I hope to gain some knowledge as well as share what I've been up to.
I guess I should jump right in. I've emptied the contents of a store-bought lava lamp into another bottle to fabricate a new custom lava lamp. I know that manufacturers uniformly discourage opening them, and most say that doing so will ruin it. But at the same time, enthusiasts uniformly deny and disregard that directive...Haha. I have already emptied the contents of the store bought lamp into my custom bottle.
What I have seen very little about is the re-capping process. Is it better to do it cold? Or do it while it is hot and in motion? I think if if I cap it cold positive pressure (probably significant) will develop. If I cap it hot, it will draw a vacuum as it cools. One person I found online said you cap it cool and "burp it" as it heats up the first time. I think that would leave me back in the vacuum scenario when it cools again.
Any thoughts or experience on this one? I admit I haven't perused the site much yet so for all know this is the most F.A.Q.
Hi Modulo '70, you visited Mathmos factory in Poole, did you? Could you take a look at the workers filling the bottles? Did they wear protective clothing like gloves or a mask or something? I wonder if it's a good idea to do exchange of the fillings or other work on lava-lamps in my kitchen and the basin of my kitchen... where I also prepare my food. Markus.