hi joao.. i know that this thread has been a long time ago, but i'm very interested in making my own cheap densimeter for my experiments.. i think that maybe i could get the exact formula of the ingredients if i know the exact density or gravity of each of the ingredients, so i could apply it for my next lamps to come.. (hopefully)
i'm wondering if it is too complicated to make, for a non-engineering student like me..??
Sorry for the delay to answer you. Well, in fact this thread is completely stopped since long time ago! I think the people in the community are not too much interested in this issue. No problems, I’m ever disposed to give information and help anyone interested to build the densimeter. It need only cheap parts cheap and is very easy to build. Please inform one email where you want receive the text with the directions to build the device.
Best regards,João Roberto Gabbardo
it's definitely not a late answer..!! lol.. in fact you are replying much faster than i expected, for an old thread like this.. =D
of course..!! you can send me the text to this email: firstname.lastname@example.org
i am totally excited to build myself one (if it is not too complicated for me of course), because i am having quite a trouble tweaking with the right gravity of each of the ingredients and it just made me end up with 11 times of trials and errors..
so i really am giving a hope for a densimeter..
Since I put the text telling about the densimeter in the thread I expected for someone interested to build the device and I was expecting that sooner or later it would happen. Well, later is much better than never! But one advice: since the densimeter works only comparing the densities of liquids it will be useful to determine the density of the salt brine or even the density of the mix of water and ethylene glycol but not too the ooze! You need determine the ooze density indirectly using the salt brine or the salt brine. For example, you can make a mix of water and ethylene glycol, put a drop of ooze inside the recipient and add more water or ethylene glycol until the drop doesn’t sink or float. If it stays at the mid height of the mix the densities of both are the same. Measuring the density of the resulting mix you will able to see if it is 1.03 g/cm^3 like described on the text describing the Retro Basic Formula. Of course using the densimeter you can get the mix directly with this value by measuring the density after adding more water or ethylene glycol to the mix and later see if the ooze density is the same of the mix.
João Roberto Gabbardo
Yes, you are sure! I don’t know how I could make this mistake when I put the message in the board. Probably I was searching for other recipe and copied the wrong link. The title of video is
How to Make A Real Lava Lamp
and the right link is:
The students added some extra comments since the time I found the video by means of banners at the top of images. For example, now they told the use of an extra solution composed of 60ml of distilled water and 40ml of ethylene glycol during the video. This information was only told by the narrator on the end of the video. Also now they suggest add some bleach and ammonia to the ooze. According them, the ooze color become darker and lighter when heat and cool. Why not test the idea to see if it really works?
João Roberto Gabbardo
if you still follow oozinggoo and read this: Could you be so kind and post your technique here, a short tutorial?
That would provide further interested people reading in the forum with the construction details, without always first having to annoy you to get them.
I'd be very interested in your insights and the whole topic of measuring the liquid density, and what you wrote sounds very promising.