Holographyforum.org / holowiki.org

spin/veil coating, you need to dry the film off. You control the thickness by concentration of the gelatin. If I set the spin speed the same, only the viscosity or gelatin/water ratio determine the thickness? In Mold coating, when do you dry the film? and how do you control the thickness? Or do you ...

Would someone please explain these terms: I see them a lot, but don't really fully understand.

broadband, narrowband, red shift, blue shift

What is Dave's resin technique? I am way behind you. What resin do you recommend? against moisture and longevity.
How is UV vs Epoxy? Somebody said UV will yellow overtime.

I divided the steps: I want to make the process consistent every time. 1. making emulsion: T&RH not important 2. spin coating: make sure no dust, is T&RH important? 3. exposure : T& RH important 4. develop: T & RH NOT important 5. sealing: T&RH important. Which step is environmen...

Knox film is a little brownish? Is there a gelatin that is crystal clear? transparent like glass.

Wow, that is nice for CA to have that for free. I will check my local dump site for more info.

How do they dispose the jug? Just dump to sewage and charge me a ton?

what temp and humidity are we talking about? Logan Utah is actually pretty humid in winter, but dry in summer.

Ann Arbor, MI is pretty humid in the summer, What DCG place are you refering to in Utah?

https://weatherspark.com/averages/30726 ... ted-States

What is the ideal environment condition should I maintain when I go through the spin and exposure, and develop, sealing process?

My understanding is the too high RH is not good as it absorb moisture, but too dry is not good either, as it seal the top layer.

-Ahgu

I remember I read somewhere that I need to put something in the waste water to turn unused dichromate to harmless chromic salt, but could not find it anymore. Anyone has the reference or chemical to use to neutralize the dichromate?