Stars Over Eden logo with “(11) The laser board” text.

Frequency asked questions about this tutorial's topic

(Q) I was mixing up the mixture to paint a foam board. When I added the the water and glue and mixed them up the mixture was fine, but when I added the blue glow powder the mixture quickly congealed and in about 20 seconds of stirring it set up like jello. I tried glue from a different container of glue all, but I still came up with it congealing in about 20 seconds of stirring. So what am I doing wrong? I would appreciate any insight you could give me.

Thanks,

Philip

 

(A) Hello, Philip. Your email about making a laser board was very
timely. Even as I write this, our six year old is having two of her
friends sleep over and the friends are very fascinated with our laser
board.

As to the congealing glow paint, the exact same thing happened to me when I made the violet glow paint for my laser board. For me, the other glow colors did not congeal, but based on your email it seems the blue paint does it as well.

I never found a real solution to the congealing problem. If you feel like
experimenting, perhaps try decreasing the amount of glue in the paint
formula. Another possible factor might might be the temperature of the
water in the paint formula. Perhaps try using very hot or very cold water
to see if that affects the congealing.

If none of the above work, consider trying a different paint color. As I
mentioned, I only had problems with the violet paint congealing.

As a work-around to the entire problem, you can paint the board with the
glue water mixture without any glow powder, and then sprinkle the glow
powder onto the board with a salt shaker as the glue is drying. This is
what I ended up doing for the violet portion of my laser board. The
coverage of the sprinkled glow powder is not as smooth as painting it on,
but if you sprinkle as evenly as you can, it comes out acceptably.

 

Take care,

 

Stars

Star burst image.

(Q) Hello, again. I used hot and cold water and it dissolved the powder really well, but each time I added the glue it congealed almost instantly. So I used a water based polyurethane, with a matte finish, instead of the glue, that dissolved the powder without congealing.


I want to thank you for your help and again I want to say that I enjoyed your presentation it was really put together well. I hope to see some of your other projects in the near future.
Thanks,
Philip

 

(A) Hi again, Philip. I'm glad you found an answer. Thank you for letting me know about it and for your kind words.

Take care,

Stars

Star burst image.

 

(Q) The recipe for the glow paint is given with 1/8 cup as the unit of measurement (1/8 cup glow powder, 2/8 cup water, and 2/8 cup glue) but the video seems to show 1⁄4 cups being used, not 1/8 cups.

 

(A) The video does indeed show 1⁄4 cup being used as the unit of measurement for the glow paint recipe. In other words, the paint recipe was doubled on the video. This was an accident. The 1/8 cup is the correct measurement unit for enough paint to cover the laser board.

Star burst image.

(Q) Your explanation of the quantum mechanics of the electrons was pretty good overall, but the outer orbital (the one that the violet photons boosted the electron into) must be more than two wavelengths long. If it was only two wavelengths, the glow in the dark paint would emit violet photons when it glowed.

 

(A) That is correct. I understand physics only at an elementary level, and then I simplified what little I do know for clarity on the video. My apologies to all quantum physicists out there!

Star burst image.

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