Search found 23 matches
- Tue Jun 06, 2017 10:55 am
- Forum: DCG
- Topic: Best coating method
- Replies: 1
- Views: 7455
Best coating method
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 ...
- Tue Jun 06, 2017 9:56 am
- Forum: Beginning Holography
- Topic: definition of broadband, narrowband, red shift, blue shift
- Replies: 1
- Views: 2437
definition of broadband, narrowband, red shift, blue shift
Would someone please explain these terms: I see them a lot, but don't really fully understand.
broadband, narrowband, red shift, blue shift
broadband, narrowband, red shift, blue shift
- Tue Jun 06, 2017 9:18 am
- Forum: DCG
- Topic: Capping DCG
- Replies: 1
- Views: 7662
Re: Capping DCG
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.
How is UV vs Epoxy? Somebody said UV will yellow overtime.
- Tue Jun 06, 2017 9:16 am
- Forum: DCG
- Topic: ideal temp and RH for working with DCG process
- Replies: 5
- Views: 9792
Re: ideal temp and RH for working with DCG process
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...
- Sun Apr 02, 2017 10:29 am
- Forum: DCG
- Topic: cyrstal clear gelatin film?
- Replies: 1
- Views: 7090
cyrstal clear gelatin film?
Knox film is a little brownish? Is there a gelatin that is crystal clear? transparent like glass.
- Fri Mar 31, 2017 10:52 am
- Forum: DCG
- Topic: neutralize unused ammonium dichromate for proper waste disposal
- Replies: 5
- Views: 10214
Re: neutralize unused ammonium dichromate for proper waste disposal
Wow, that is nice for CA to have that for free. I will check my local dump site for more info.
- Thu Mar 30, 2017 1:36 pm
- Forum: DCG
- Topic: neutralize unused ammonium dichromate for proper waste disposal
- Replies: 5
- Views: 10214
Re: neutralize unused ammonium dichromate for proper waste disposal
How do they dispose the jug? Just dump to sewage and charge me a ton?
- Thu Mar 30, 2017 1:35 pm
- Forum: DCG
- Topic: ideal temp and RH for working with DCG process
- Replies: 5
- Views: 9792
Re: ideal temp and RH for working with DCG process
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
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
- Tue Mar 28, 2017 9:28 am
- Forum: DCG
- Topic: ideal temp and RH for working with DCG process
- Replies: 5
- Views: 9792
ideal temp and RH for working with DCG process
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
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
- Tue Mar 28, 2017 12:05 am
- Forum: DCG
- Topic: neutralize unused ammonium dichromate for proper waste disposal
- Replies: 5
- Views: 10214
neutralize unused ammonium dichromate for proper waste disposal
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?