1st time on DCG Project

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Re: 1st time on DCG Project

by Zeta » Sat Apr 21, 2018 4:17 am

Hello

My plate looks dimmer and not clear.
Is this because old emulsion, my develop is bad or under/over exposed ?
A7171B73-CF21-41D3-8243-838F35558BA9.jpeg
Coat yesterday
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DBAE41D3-BC55-47CD-A8AA-FE0AF5DB00B6.jpeg
Coat last week
DBAE41D3-BC55-47CD-A8AA-FE0AF5DB00B6.jpeg (90.76 KiB) Viewed 6745 times

How can I get rid of that fringe line while using mirrors?

Re: 1st time on DCG Project

by Zeta » Sat Apr 14, 2018 1:40 pm

Another depth test

https://youtu.be/zx4jb_JuZ6g
DA9F9CB6-C33B-433A-8E31-AB3FA8EC6134.jpeg
DA9F9CB6-C33B-433A-8E31-AB3FA8EC6134.jpeg (1.66 MiB) Viewed 6868 times
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364D0DBD-61D2-487A-B47B-6C11284D9423.jpeg (1.72 MiB) Viewed 6868 times

Re: 1st time on DCG Project

by Zeta » Fri Apr 13, 2018 1:32 pm

Hello

Update test for depth

https://youtu.be/ucwrjBUwATA
C87FDDD3-82E7-4069-9A25-A0C8DE25D863.jpeg
C87FDDD3-82E7-4069-9A25-A0C8DE25D863.jpeg (1.8 MiB) Viewed 6888 times
I have another one but it is not very good in depth.
Just an inch away from the upper part, too blur to see anything.
Is there any way to increase the depth? Or I miss some things?

Re: 1st time on DCG Project

by Steven » Tue Apr 10, 2018 8:41 pm

Zeta wrote:Is it better to get closer to 90degree or 56degree is the best?
The easiest way to get the correct angle for minimum reflection, is to place an uncoated piece of glass, a slide in your case on
your setup and adjust the angle of your laser beam to give you minimum reflection of the beam on your ceiling.

I have a very similar setup and that is what I do. I don't measure angles.

Re: 1st time on DCG Project

by pluto » Tue Apr 10, 2018 6:46 pm

Zeta wrote:Finally

The best one (at this moment)
Thank you pluto and everyone.

278FF892-7053-4FFC-98A8-11574780ACFA.jpeg

https://youtu.be/x8As5vZkGeU

So the left side 1min is call Narrow band and right side 5min is call Broadband right? Or I just overexposed it.

Is it better to get closer to 90degree or 56degree is the best?

If I do a bigger plate do I have to change a develope time in each bath?
Nice! Yes, 56 degrees is about right for glass.

I would try screws next, as this will test whether you can get some depth. The coin holograms are very shallow, almost appearing as photographs.

Bigger plates will need more time in both water and IPA, as you need to wash out more dichromate and dehydrate more surface area.

Just keep at, don't change too many variables at once and keep good notes.

I post every hologram I make, whether good or bad onto YouTube with some info in the title describing the parameters of the exposure.

Keep at it!

Re: 1st time on DCG Project

by Zeta » Tue Apr 10, 2018 1:37 pm

Finally

The best one (at this moment)
Thank you pluto and everyone.
278FF892-7053-4FFC-98A8-11574780ACFA.jpeg
278FF892-7053-4FFC-98A8-11574780ACFA.jpeg (227.07 KiB) Viewed 6923 times
https://youtu.be/x8As5vZkGeU

So the left side 1min is call Narrow band and right side 5min is call Broadband right? Or I just overexposed it.

Is it better to get closer to 90degree or 56degree is the best?

If I do a bigger plate do I have to change a develope time in each bath?

Re: 1st time on DCG Project

by pluto » Mon Apr 09, 2018 11:05 pm

Zeta wrote:Came back with nothing.

This is my setup diagram.
7301002C-9351-452E-B678-8E596F4E3270.jpeg

Today subjects
15AC2D4D-318C-43A9-BBA3-82D1A6B8274A.jpeg

What I got
30mindark 1minfixer 5minwater 1min59% 1min84% 3min99% dry hotgun

E9F7A673-66AF-451D-AF3F-394B6DD27DE7.jpeg

Is this call burn in effect?

https://youtu.be/kaZUhbqYrts
There may be movement during your exposure. Simplify your developing process so you can figure out how your process is affecting the result. Fix your hologram by exposing it to a 100 watt lightbulb for 30 seconds instead of a fixer. Wash in water for upto 5 minutes, then 70% IPA, then 99% IPA.

Touch your plate to the subject of the hologram, so if there is movement, then everything will move together.

Don't try to have your plate "hover" above your subject. Try simply placing your plate (emulsion side down) on a pile of screws. Let it settle for 5-10 minutes, then turn on the laser (preferably remotely). Aim for a 5x5cm hologram to start, which should need only 2-4 minute exposure time, depending on how much light is being lost.

Try to strike the plate at brewser's angle (56 degrees) to minimise reflection. You can find this angle experimentally by observing the amount of light being reflected onto a wall.

Re: 1st time on DCG Project

by Zeta » Mon Apr 09, 2018 3:25 pm

Came back with nothing.

This is my setup diagram.
7301002C-9351-452E-B678-8E596F4E3270.jpeg
7301002C-9351-452E-B678-8E596F4E3270.jpeg (348.11 KiB) Viewed 4902 times
Today subjects
15AC2D4D-318C-43A9-BBA3-82D1A6B8274A.jpeg
15AC2D4D-318C-43A9-BBA3-82D1A6B8274A.jpeg (534.86 KiB) Viewed 4905 times
What I got
30mindark 1minfixer 5minwater 1min59% 1min84% 3min99% dry hotgun
E9F7A673-66AF-451D-AF3F-394B6DD27DE7.jpeg
E9F7A673-66AF-451D-AF3F-394B6DD27DE7.jpeg (1.74 MiB) Viewed 4905 times
Is this call burn in effect?

https://youtu.be/kaZUhbqYrts

Re: 1st time on DCG Project

by admin_jsfisher » Sun Apr 08, 2018 9:33 pm

In addition to the under-exposed comments, I think the five minutes in the final alcohol bath seems a bit long. Monitor the final bath under normal lighting. If/when an image appears you are just about done.

Re: 1st time on DCG Project

by pluto » Sun Apr 08, 2018 7:31 pm

Zeta wrote:Finally some part of an image appears.
5min exp 50mw 532 30mindark 2min fixer 5min water 2min58% 2min85% 5min99% dry with heat gun

https://youtu.be/rPUqp83xrWM

But only the lower part of the body appears.

B6AA08E3-5C26-4918-BBF3-159E4E39C94F.jpeg

I have a questions.

After finishing coating the plate and wait for 1hr should I put it in refrigerator(in the box) or just store it in the dark?

My plate looks over or under exposed?

Can dcg be over exposed and what it will look like?
After coating you should store the plates in a warm dark place to dry for 4-12 hours. You can store in a refrigerator, but it might cause condensation on the plates. They need to be sealed to prevent this.

Your hologram looks underexposed, overexposure tends to leave a "burned in" effect.

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